To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Please refer to your browser's Help pages for instructions. What kind of tool do I need to change my bottom bracket? Well I solved the problem by using in a model a tool named "Pivot Tabel" - this tool practically transposed all my rows in columns which is all I needed. When writing this code in an 'imperative' way, you'd like to generate more rows out of one, possibly using something like flatMap (or equivalent in your programming language). You can also use PIVOT and UNPIVOT to more easily migrate from your existing data warehouse systems to Amazon Redshift. Javascript is disabled or is unavailable in your browser. select (row_number () over (order by true))::int as n into numbers from food limit 100; This will create numbers table. The demo in this article based on a database from the TechNet Gallery.. PIVOT rotates a table-valued expression by turning the unique values from one column in the expression into multiple columns in the output, and performs aggregations where they are required on any remaining column . Solution 1: Preserve the old data: EXEC sp_rename 'MyTable.OldCol', 'RenamedOldCol . Redshift PIVOT and UNPIVOT are two separate manifestations of the same relationship/relational operator. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 6. right click the .sql file again and select "Open With." > "Choose Default Program" 7. The PIVOT IN list values cannot be column references or I'm Vithal, a techie by profession, passionate blogger, frequent traveler, Beer lover and many more.. First, set up a sample table (as shown below) and use it to run the subsequent queries. I was able to use Cross Join logic to have my solution. How to delete duplicate rows in SQL Server? It is based on PostgreSQL, but being a columnar distributed database, it does not support all functions that are available in PostgreSQl. Find centralized, trusted content and collaborate around the technologies you use most. Click the .sql file it should open SSMS 9. . However, the count In the connect inDB tool, put your custom SQL, send that straight to a Write Data inDB tool. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Amazon Redshift now supports PIVOT and UNPIVOT SQL operators that can help you transpose rows into columns and vice versa with high performance, for data modeling, data analysis, and data presentation. https://www.db-fiddle.com/f/kojuPAjpS5twCKXSPVqYyP/3, Given that you have 150 columns to transpose, I do not think its feasible to do it with SQL. brackets. Thanks. How to Connect to Databricks SQL Endpoint from Azure Data Factory? When selecting the max ID you acquire a U lock on the row. [TblDeparmentEmployee] ( [Department] [nvarchar] (max) NULL, [EmployeeName] [nvarchar] (max) NULL . How can I drop 15 V down to 3.7 V to drive a motor? The AS keyword is optional. Amazon Redshift is relatively new to relational databases. Sci-fi episode where children were actually adults. The UNPIVOT operator accepts optional aliases on each IN list value. Asking for help, clarification, or responding to other answers. We're sorry we let you down. Your query will be something like below. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. If the IN list values do not have aliases, PIVOT generates default column You can apply PIVOT and UNPIVOT to tables, sub-queries, and common table expressions (CTEs). Redshift Transpose Rows to Column Example Pivot or transpose rows to columns is very common requirement in a data warehouse environment. Pivoting with "Data Pivot" Pipeline Step. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. In this article, we will check how to split delimited fields into table records or rows using Redshift built in function. Following is the example of Teradata STRTOK_SPLIT_TO_TABLE function. Unique, primary key, and foreign key constraints are permitted, but they are informational only. 09-14-2018 09:32 AM. strings: To concatenate columns that might contain nulls, use the NVL function. The sample query results in booking dates listed next to short phrases that indicate which hotels are booked. Here's how to do it: Select the range of data you want to rearrange, including any row or column labels, and press Ctrl+C. Thanks for letting us know we're doing a good job! Note: Ensure that you copy the data to do this, since using the Cut command or Ctrl+X won't work. 5. close notepad. can be correlated internally or on the PIVOT input table. The default stack name is aws-blog-redshift-column-level-encryption. One approach would be to add the missing members to all structs so that the approach of my previous answer works again.. cols = ['a', 'b', 'c'] #create a map containing all struct fields per column existing_fields = {c: list (map (lambda field: field . The platform provides150+ ready-to-use integrationswitha range of data sources and is trusted by hundreds of data-driven organizations from 30+ countries. How to intersect two lines that are not touching. An example is the following: ["first", {"one":1}, "second", 3, null]. Supported browsers are Chrome, Firefox, Edge, and Safari. In a JSON key:value pair, the key is a string in double quotation marks. How are we doing? But you can change row data to columns, in a similar manner to an aggregation with PIVOT, with a query like the following. Please refer to your browser's Help pages for instructions. use the unpivot operation in redshift select date,id,column_name,col from table_name unpivot (col for column_name in (alpha,beta,gamma,)) Share Follow answered Sep 21, 2022 at 6:30 Akash Singh 171 1 10 Add a comment 0 Concatenating Multiple columns in an Access table to one specific row. STATE values from the VENUE table but delimits the resulting string with a comma and these additional clauses, see the COUNT. Not the answer you're looking for? provides customization of the data in each value column. I've a column called "Description" in a table called "Food" which includes multiple food item names delimited by , such as chicken, soup, bread, coke, How can I extract each item from the column and create multiple rows. These First, we'll need a table with a day column and a count column: Next, we'll write a Redshift common table expression (CTE) and use a windowed SUM function to get the cumulative sum/running total: Is there an easy way to transpose rows and columns in SQL? Extracting string and converting columns to rows in SQL (Redshift), The philosopher who believes in Web Assembly, Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. stack requires that all stacked columns have the same type. So let's look how to transpose these rows into columns. Sometimes you need to transpose columns into rows, or unpivot table in MySQL. The only difference is, the PIVOT operator returns 0 for column 2 and the manufacturer M3. Thanks for letting us know we're doing a good job! Thanks for letting us know this page needs work. An expression can contain SQL functions. The UNPIVOT name column is of type VARCHAR. 2 Ask your analyst to change the data model to adapt to real use cases modelling. Maybe is possible to create a python function to create some kind of dynamic query. The aggregate arguments Your query would become: valid value for the IN operator. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Amazon Redshift SQL does not implicitly define system columns. unpivot (col for column_name in (alpha,beta,gamma,..)), Now Redshift supports Pivot and Un-pivot operations,You can use these operations to get the desired output as per this use case you have mentioned. Javascript is disabled or is unavailable in your browser. JSON_EXTRACT_ARRAY_ELEMENT_TEXT consider that max of 10 items can be there and hence Item10. The PIVOT aggregate expression has to be a call of a supported aggregate function. The table contains monthly sales quantity. Amazon Redshift column store architecture. These two communicate with each other using the industry-standard JDBC and ODBC drivers for PostgreSQL. Making statements based on opinion; back them up with references or personal experience. In what context did Garak (ST:DS9) speak of a lie between two truths? How small stars help with planet formation. I'm pulling the data via API and pushing the same into the Redshift using post sql statement option of output tool. ), Scale your data integration effortlessly with Hevos Fault-Tolerant No Code Data Pipeline. or UNPIVOT expressions. (Even The SQL is more than 8k rows long). Thanks for contributing an answer to Stack Overflow! Task: transpose rows to columns for each group. You need to add some conditional magic and Voila!. Redshift Split Delimited Fields into Table Records and Examples, Quick and Best way to compare two tables in SQL, Redshift Decode Function syntax and Example, Amazon Redshift CASE Function Syntax, Usage and Examples, Reuse Column Aliases in BigQuery Lateral Column alias. The following output for the above-mentioned query is as follows: Note: Redshift PIVOT operator returns similar data (with the query given below), including GROP BY. returns the average prices in rows, rather than in columns. Now, PIVOT on partname with an AVG aggregation on price. Each value must be type compatible with the FOR column reference. 0. expressions, recursive CTEs, PIVOT, or UNPIVOT expressions. However, this is a slow process as you have to convert individual rows into columns. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. and HAVING. input arguments. Below is the syntax of redshift split_part function. Hum. We will name the output columns a and b for the Presto key, and we'll include the id in our result set. source_sql is an SQL statement that produces the source set of data. To rotate from rows to columns we will add an id to make aggregation easy. SELECT UserId, FromDate, ToDate, Project, Comment FROM ( SELECT r.UserId, r.Text, c.ColumnName, SetNo = ROW_NUMBER () OVER (PARTITION BY r.UserId, r.ColumnId ORDER BY r.Id) FROM dbo.Columns AS c INNER JOIN dbo.Response AS r ON c.Id = r.ColumnId ) AS derived PIVOT ( MAX (Text) FOR ColumnName IN (FromDate, ToDate, Project, Comment) ) AS p ; For example, consider below example of student result table. I write about Big Data, Data Warehouse technologies, Databases, and other general software related stuffs. Then run the query. Convert comma delimited values into rows, How to concatenate text from multiple rows into a single text string in SQL Server, Splitting variable length delimited string across multiple rows (SQL), Efficiently convert rows to columns in sql server. T-SQL does not have an easy way to transpose a row and a column. That way it will be easy to compare the temperatures both horizontally, between adjacent months, and vertically, between different years. How can we transpose a Redshift table from columns to rows? What's the best method to convert these columns Item1 to Item10 to store as rows? The query gives out the following output: Redshift PIVOT operator accepts optional aliases on the aggregate expression, and for each value for the IN operator, too. def is a binary value (with hexadecimal representation of 646566). The result for the above-mentioned query is as follows. You can convert the table to a range first, or you can use the TRANSPOSE function to rotate the rows and columns. The UNPIVOT IN list must contain only input table column references. In theory, their use case might seem basic, but in reality, their usage leaves cascading effects on the project management landscape as a whole. Let's get practical with a real data set! This website uses cookies to ensure you get the best experience on our website. The Columns of the input table that are not referenced in the UNPIVOT definition are To use the Amazon Web Services Documentation, Javascript must be enabled. Commonly used Redshift String Functions and Example, Redshift WITH clause Syntax, usage and Examples, Amazon Redshift Regular Expression Functions and Examples, Reuse Column Aliases in BigQuery Lateral Column alias. column or columns. PIVOT supports the COUNT, SUM, MIN, MAX, and AVG aggregate functions. What is the term for a literary reference which is intended to be understood by only one other person? {FoodID, FoodName, Description} ==> {123, Meal, chicken}, What does a zero with 2 slashes mean when labelling a circuit breaker panel? Seamlessly load data from 150+ sources to Redshift in real-time with Hevo. Solution 1: You will need to use backticks around group which, as you said, is a mysql reserved keyword. What kind of tool do I need to change my bottom bracket? Many relational databases supports pivot function, but Amazon Redshift does not provide pivot functions. It depends on what you want to do with non-unique rows. Amazon Redshift architecture is based on an extensive communication channel between the client application and the data warehouse cluster. column. 03-11-2015 12:17 AM. Why don't objects get brighter when I reflect their light back at them? The data represents booking dates for a key:value pairs in a single JSON string and eliminate the sparsely-populated table columns. Thanks for letting us know this page needs work. How to Unpivot Table in MySQL. PIVOT cannot be applied to any JOIN Yash Arora AWS support for Internet Explorer ends on 07/31/2022. The query below shows UNPIVOT with quality as an implicit column. collection of hotels. January 7th, 2022. Use VARCHAR if the strings include multi-byte characters. Actually I am using copy command to push the data to redshift DB from S3. The HAVING clause is used Your queries return an _id or _count column when the table is defined to have such a column, or when the query explicitly computes it.. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. In the previous example, the results are transformed into columns. If you don't know the column names before hand, or want to display row values as columns in MySQL dynamically, you can create dynamic pivot tables in MySQL using GROUP_CONCAT function, as shown below. PIVOT and UNPIVOT are parameters in the FROM clause that rotate query output from rows to columns and columns to {123, Meal, soup}, This website uses cookies to ensure you get the best experience on our website. How can I detect when a signal becomes noisy? PIVOT in the above example returns similar information as the following query, which includes GROUP BY. appended to the column name with an underscore to separate the names. Thanks for letting us know this page needs work. Connect and share knowledge within a single location that is structured and easy to search. UNPIVOT on input columns red, green, and blue. rev2023.4.17.43393. Redshift. Otherwise, the aggregate alias is appended to the column name with an underscore to separate the names. Pivot the data After you have set up the data source, in the grid, select two or more columns. Otherwise, the aggregate alias is Broken pipelines, data quality issues, bugs and errors, and lack of control and visibility over the data flow make data integration a nightmare. In the relational database, Pivot used to convert rows to columns and vice versa. What screws can be used with Aluminum windows? CREATE TABLE [dbo]. efficiently query hierarchical data. Click the drop-down arrow next to the column name, and then select Pivot. This makes switching rows to columns easy. cases, PIVOT inserts NULL if a row doesn't have input data for a given column. I propose more general and error prone solutions: 1 Ask programmers to do their job and provide queries adapted to your data model. An expression formed from one or more columns that exist in the tables referenced by the query. Amazon Redshift is relatively new to relational databases. Please check the below link to know more details. To learn more, see our tips on writing great answers. Not the answer you're looking for? Let's say you have the following pivot table You can use the TRANSPOSE function for converting multiple rows into a single column in Excel. Input table columns that are not referenced in the PIVOT definition are e.g. ignored. Transpose columns in postgresql - lateral join? without needing to add columns to a table. table expressions (CTEs). This statement must return one row_name column, one category column, and one value column. suppose you have a sparse table, where you need to have many columns to fully represent all It does not provide functions such as regexp_split_to_table or array functions. Can a rotating object accelerate by changing shape? SQL : How to transpose rows to columns with large amount of the data in BigQuery/SQL?To Access My Live Chat Page, On Google, Search for "hows tech developer . Thanks for contributing an answer to Stack Overflow! Solution 1: Try this: BEGIN TRAN INSERT INTO TBLKEY VALUES( (SELECT MAX(ID) + 1 AS NVARCHAR) FROM TBLKEY WITH (UPDLOCK)),'EHSAN') COMMIT. How do philosophers understand intelligence (beyond artificial intelligence)? By using JSON for storage, you might be able to store the data for a row in key:value pairs in a single JSON string and eliminate the sparsely-populated table columns. Easy enough in Chartio's Data Explorer. arguments. Is there a free software for modeling and graphical visualization crystals with defects? But I don't know if it will be possible to the result using something like. The category and value columns must be the last two columns, in that order. Get max date from columns in Redshift using a dynamically changing list of columns and tables with Python? It is based on PostgreSQL, but being a columnar distributed database, it does not support all functions that are available in PostgreSQl. added implicitly to the result table. Asking for help, clarification, or responding to other answers. You can also use PIVOT and UNPIVOT to more easily migrate from your existing data warehouse systems to Amazon Redshift. color | cnt-+red | 15red | 35red | 10green | 20green |green | 23blue | 7blue | 40blue |. In this sample query, booking records are tallied to give a total for each week. Some rows will have more than one null entry somewhere. It may also have one or more "extra" columns. Making statements based on opinion; back them up with references or personal experience. That operation is also called to transpose (Alteryx), unpivot (Snowflake), pivot Columns to Rows (Tableau Prep) or melt a table (Panda). By using JSON for storage, you might be able to store the data for a row in Though Amazon Redshift supports JSON functions over In most they are all compatible with. We will use Redshift WITH clause to generate the position number to extract the required values. The output for the above-mentioned query is shown below: The next query shows the UNPIVOT operator with aliases for IN lists values. A Comprehensive Amazon Redshift Tutorial 101, Best Redshift Data Modeling Tools in 2023. Thank you Red Boy. The data type of the expression is the same type as the to a parent query are also not supported. So I used a number iterator along with Cross Join. You can also have a look at the unbeatablepricingthat will help you choose the right plan for your business needs. You would need to hard-code the column names into the query. Below is the MySQL code for the generic procedure which will take the student_id as a parameter. However, the PostgreSQL system column . Why is current across a voltage source considered in circuit analysis but not voltage across a current source? Theorems in set theory that use computability theory tools, and vice versa, What are possible reasons a sound may be continually clicking (low amplitude, no sudden changes in amplitude), YA scifi novel where kids escape a boarding school, in a hollowed out asteroid, Mike Sipser and Wikipedia seem to disagree on Chomsky's normal form. Also not supported are SUPER unnested expressions and Redshift Spectrum nested tables. Redshift. difference is that PIVOT returns the value 0 for column 2 and the manufacturer small parts co. White space between JSON structural elements (such as { }, [ ]) is For an example of A PIVOT example with manufacturer as an implicit column. Amazon Redshift support for PIVOT and UNPIVOT is available in all AWS commercial regions where Amazon Redshift is available. Please refer to your browser's Help pages for instructions. Billions of data events from sources as varied as SaaS apps, Databases, File Storage and Streaming sources can be replicated in near real-time with Hevos fault-tolerant architecture. From columns in Redshift using a dynamically redshift sql transpose rows to columns list of columns and tables with python | 23blue | |., between different years to separate the names ( beyond artificial intelligence ) however, is. Browsers are Chrome, Firefox, Edge, and AVG aggregate functions add. 3.7 V to drive a motor speak of a supported aggregate function be applied any... Is disabled or is unavailable in your browser 's Help pages for instructions warehouse systems to Amazon.. And foreign key constraints are permitted, but being a columnar distributed database, it does not PIVOT... Tutorial 101, best Redshift data modeling Tools in 2023 by hundreds data-driven. Would become: valid value for the above-mentioned query is shown below: the next query shows the operator! For the in operator a Redshift table from columns in Redshift using a dynamically changing list of columns and versa! 7Blue | 40blue | to Databricks SQL Endpoint from Azure data Factory, one category column, category. Drive a motor between the client application and the manufacturer M3 or is unavailable your. Custom SQL, send that straight to a range first, or responding to other answers Given that you to! Formed from one or more columns term for a literary reference which intended. Or transpose rows to columns we will add an ID to make aggregation easy systems to Redshift... Pivot and UNPIVOT is available website uses cookies to ensure you get the best method to convert these Item1! Is very common requirement in a JSON key: value pair, the COUNT, SUM,,. Source considered in circuit analysis but not voltage across a voltage source considered in circuit analysis but not voltage a. Key, and then select PIVOT, as you have to convert these columns Item1 Item10. Column example PIVOT or transpose rows to columns is very common requirement in a single that... A row does n't have input data for a Given column questions tagged, Where developers technologists. This statement must return one row_name column, one category column, one category column, and Safari PIVOT! Https: //www.db-fiddle.com/f/kojuPAjpS5twCKXSPVqYyP/3, Given that you have set up the data model adapt. To our terms of service, privacy policy and cookie policy can I detect when a signal noisy! Good job an extensive communication channel between the client application and the manufacturer.... Integration effortlessly with Hevos Fault-Tolerant No Code data Pipeline for PIVOT and UNPIVOT to easily! That max of 10 items can be there and hence Item10, Databases, and one value.! Sample query results in booking dates listed next to the column name with an underscore to separate the names you! Min, max, and Safari Redshift Tutorial 101, best Redshift data modeling Tools in 2023 expressions recursive... Sql Endpoint from Azure data Factory from Azure data Factory to adapt to real use redshift sql transpose rows to columns! Records are tallied to give a total for each group PIVOT input table information as the following query which! Value pairs in a JSON key: value pair, the aggregate alias is appended to the column name and! Columns in Redshift using a dynamically changing list of columns and vice.... A lie between two truths use most prices in rows, rather than in columns visualization crystals defects... Find centralized, trusted content and collaborate around the technologies you use most Ask your analyst to change my bracket...: transpose rows to columns and vice versa for PIVOT and UNPIVOT is available SUM, MIN, max and. The rows and columns sample query, which includes group by based on an communication... Voltage across a current source into rows, rather than in columns vice. Below: the next query shows the UNPIVOT operator accepts optional aliases on each in list value 20green |! Redshift with clause to generate the position number to extract the required values what is the type. Drive a motor two columns, in that order, Edge, and Safari must redshift sql transpose rows to columns input!: DS9 ) speak of a supported aggregate function drivers for PostgreSQL table records or rows using Redshift in... And one value column SUM, MIN, max, and other general software related.. Create a python function to create some kind of dynamic query will take student_id... Given column get the best method to convert rows to columns for each group quality... Columns red, green, and one value column effortlessly with Hevos Fault-Tolerant No Code data Pipeline provide... Way it will be possible to the column name with an underscore to separate the names columns in! Is based on PostgreSQL, but Amazon Redshift architecture is based on an extensive communication between! Is appended to the column names into the query definition are e.g example returns similar as. Below: the next query shows the UNPIVOT operator with aliases for lists! Clauses, see our tips on writing great answers as you said, is a MySQL keyword! Operator returns 0 for column 2 and the manufacturer M3 Redshift PIVOT and UNPIVOT are two separate of... More general and error prone solutions: 1 Ask redshift sql transpose rows to columns to do their and... Are not touching quality as an implicit column easy way to transpose a row n't! Ds9 ) speak of a lie between two truths the above example similar. To this RSS feed, copy and paste this URL into your RSS reader following query, includes. Unpivot with quality as an implicit column stack requires that all stacked columns have the type! How can I drop 15 V down to 3.7 V to drive a motor software related stuffs let #! Plan for your business needs have a look at the unbeatablepricingthat will Help choose... Dates for a literary reference which is intended to be a call of a supported aggregate function be the two! But not voltage across a current source in Redshift using a dynamically changing list columns. Organizations from 30+ countries technologists worldwide pivoting with & quot ; data PIVOT & quot ; PIVOT... Provides150+ ready-to-use integrationswitha range of data sources and is trusted by hundreds of data-driven organizations from countries... Privacy policy and cookie policy a free software for modeling and graphical visualization with... Comma and these additional clauses, see our tips on writing great answers trusted by hundreds of data-driven organizations 30+.: //www.db-fiddle.com/f/kojuPAjpS5twCKXSPVqYyP/3, Given that you have set up the data type the! Light back at them some rows will have more than 8k rows long ) general and error solutions. Of tool do I need to hard-code the column name with an to... Difference is, the COUNT records are tallied to give a total for each week Redshift transpose rows columns! A lie between two truths: value pair, the COUNT sources to Redshift DB S3... More columns make aggregation easy select PIVOT not be applied to any Join Arora. And eliminate redshift sql transpose rows to columns sparsely-populated table columns that are not referenced in the PIVOT aggregate expression to. Cross Join logic to have my solution you get the best experience on our website it is based opinion! Pivot supports the COUNT in the above example returns similar information as the to a Write data inDB...., Given that you have 150 columns to rows URL into your RSS reader questions,... With coworkers, Reach developers & technologists share private knowledge with coworkers, Reach &! References or personal experience on an extensive communication channel between the client application and the manufacturer.!, is a MySQL reserved keyword list must contain only input table columns might! Are not touching aggregate function queries adapted to your browser UNPIVOT table in MySQL 646566 ) the in... And columns pivoting with & quot ; Pipeline Step represents booking dates for a column. Provide PIVOT functions are Chrome, Firefox, Edge, and AVG aggregate functions expression from... Sql does not support all functions that are not referenced in the PIVOT operator returns for. On opinion ; back them up with references or personal experience sample query, which includes group.! Can we transpose a row and a column file it should open SSMS 9. up the data in value! The manufacturer M3 not provide PIVOT functions let & # x27 ; s get practical with comma! From 30+ countries Help pages for instructions way it will be possible create. Column names into the query below shows UNPIVOT with quality as an implicit column not all. Months, and foreign key constraints are permitted, but being a columnar distributed database redshift sql transpose rows to columns does... Then select PIVOT includes group by general and error prone solutions: 1 Ask programmers to do it SQL. Chartio & # x27 ; s data Explorer to give a total for each week red! Sql Endpoint from Azure data Factory or transpose rows to column example PIVOT or rows. My bottom bracket more than one NULL entry somewhere 1 Ask programmers to do with non-unique rows to two! Technologies, Databases, and Safari also not supported includes group by, includes. Your query would become: valid value for the in operator each in must! Distributed database, it does not support all functions that are not touching warehouse systems to Redshift... Total for each week tool do I need to use backticks around group which as. Rows will have more than 8k rows long ) python function to rotate from rows to columns for group... Primary key, and Safari cases, PIVOT, or UNPIVOT expressions Chrome, Firefox, Edge, and.! Want to do their job and provide queries adapted to your browser a real set. Migrate from your existing data warehouse systems to Amazon Redshift transpose, I do not think its to... String and eliminate the sparsely-populated table columns that might contain nulls, use the transpose function to create python!

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redshift sql transpose rows to columns