PostgreSQL CROSSTAB. It is meant to display query results in a crosstab-like representation, when the structure of the resultset is amenable to such a transformation. This table shows the number of observations with each combination of possible values of the two variables in each cell of the table. This extension provides a really interesting set of functions. Le jeudi 06 septembre 2012 à 00:40 -0700, Chris Travers a écrit : On Thu, Sep 6, 2012 at 12:40 PM, Vincent Veyron. However, using a criteria expression with the column heading field does not limit the number of columns returned by the crosstab query. After that create csv file by splitting single column into 3 columns. It must return 3 columns; The first column is the row identifier for your final pivot table e.g name; The 2nd column is the category column to be pivoted e.g exam; The 3rd column is the value column that you want to pivot e.g score Account, Store, Amount 100, St1, 1000.00 100, St2, 2000.00 to get: Acount, St1 , St2 100, 1000.00 2000.00 to get that in your query... St1 and St2 - must be hardcoded... (is there 1 column per Store, or 3 columns per store it is less important...) if it St1 and St2 are hardcoded in query, even if in table is: Account, Store, Amount 100, St1, Thank you. So, we are doing that in two steps... first calculate how much columns we should return...No of stores in in your Sales table, Thank you. Am not sure how your table structure is designed to use the best of crosstab. Timely you can work with above example.Â, On Wed, Sep 5, 2012 at 10:14 PM, punnoose. But will send another mail to dont mix subjects... http://www.postgresql.org/mailpref/pgsql-general, http://postgresql.1045698.n5.nabble.com/pivot-functions-with-variable-number-of-columns-tp5723013.html, http://okbob.blogspot.cz/2008/08/using-cursors-for-generating-cross.html. The second crosstab parameter ('SELECT generate_series(0,3)') is a query string when executed returning one row for every target column. Documentation: 9.3: tablefunc, crosstab(text sql), setof record, Produces a "pivot table" containing row names Notice that crosstab itself does not pay any attention to the second column of the Generally, this is limited by the maximum number of columns a table can hold. Can some postgres … Hello, as you don't seems to need the returned column definition in Postgres, a solution may be to cast the result to text. In PostgreSQL, you can rotate a table using the CROSSTAB function. PostgreSQL 9.4: Using FILTER CLAUSE, multiple COUNT(*) in one SELECT Query for Different Groups; PostgreSQL: Multiple GROUP BY using GROUPING SETS in Single SQL Query; PostgreSQL 10: Introduced IDENTITY Column for generating Sequence; PostgreSQL: Example of CROSSTAB query, for PIVOT arrangement; PostgreSQL 9.5: Row Level Security by Example This is called a pivot table and can be achieved in PostgreSQL using the crosstab() function, but there’s a catch: you need to type out all of the column names. Instead of building dynamic query isn't it reasonable to create csv file directly from code without using crosstab but creating it manually ?                 product_code::text,                 where product_code=''A'' or product_code=''B'' or product_code=''C''. In the query design grid, in the Crosstab row for the column heading field, select Column Heading. : create or replace function get_record () returns setof text as $$ select (foo)::text from (values(1,'a a'),(3,'b b'))foo $$ language sql; select trim(r,'\\(\\)') from get_record () r; regards, Marc Mamin From: pgsql-general-owner@postgresql.org On Behalf Of Misa Simic Sent: Montag, 6. That's what we'll cover in this article. Someone, might have better example. The table below is a crosstab that shows by age whether somebody has an unlisted phone number. e.g. One of them is the crosstab function, which is used for pivot table creation. Functions like COLUMN_CREATE, COLUMN_ADD, COLUMN_DELETE always return valid dynamic column blobs. Just replace N with number ... (user can define files and urls at static mode or in a dynamic way). Hi, I think you dont understand me (or I do not understand you :) ) the point is - it is not possible to get unknown no of columns in 1 SQL query... i.e. Pictorial Presentation of PostgreSQL SPLIT_PART() function This function can be used to check if a value in a blob field is a valid dynamic column blob. If data from February gets into the table, it will aggregate data from, e.g. You could detect the columns you want to return and use a plpgsql function that returns a refcursor, I suppose. Another possibility is to merge those 3 columns into single column and crosstab it . We can see, for example, that 185 people are aged 18 to 34 and do not have an unlisted phone number. The PostgreSQL split_part function is used to split a given string based on a delimiter and pick out the desired field from the string, start from the left of the string. Looking for Dynamic Crosstab/Pivot help. Here is different syntax to use crosstab in postgres. For half-over months or months with fewer than 31 days, the final columns of the crosstab should just be blank. The “tablefunc” module provides the CROSSTAB() which uses for displaying data from rows to columns. \crosstabview is a psql command included in PostgreSQL 9.6.        ) as ct(customer_id text, "A" text,"B" text,"C" text); I want to have a pivot like function in which i should have variable number of columns.i went for crosstab but it doesnot support variable number of columns.Can any body suggest an alternative.like if i have a event at a particular time of the day like one at 02:35,11:34, then i should have column name 02:35,11:34. I already shared few similar articles on PostgreSQL PIVOT and new CROSSTABVIEW. After that create csv file by splitting single column into 3 columns. This would just be outputted as > one single column from database. In this post, I am sharing an example of CROSSTAB query of PostgreSQL. To avoid spending my life typing out column names, I wrote a function in Postgres procedural language ( PL/pgSQL ) that will generate a crosstab query automatically. In interactive use, it's an easier alternative to a heavy rewrite of a query just for the purpose of looking at a pivoted representation. Then you can add a Table/List/Crosstab item with dynamic row and column groups based on the columnName and rowIndex fields. The report can be previewed in the Standalone Report Designer of Telerik Reporting R1 2017 and newer. Jan 2 and Feb 2 … User account menu • Why does a limit change the number of columns in the tuple a crosstab() call returns? r/PostgreSQL: The home of the most advanced Open Source database server on the worlds largest and most active Front Page of the Internet. I din't knwo this. PS: The way I have constructed it, I would avoid using WHERE date >= ''2010-01-01''. Basics for crosstab(): PostgreSQL Crosstab Query; Replace NULL with 0 Another possibility is to merge those 3 columns into single column and crosstab it . You can enter an expression in the Criteria row to limit the results for the column heading field. PostgreSQL: CREATE PIVOT TABLE to arrange Rows into Columns form Februar 2012 19:52 To: Andrus Cc: pgsql-general@postgresql.org Subject: Re: http://stackoverflow.com/questions/9162497/how-to-generate-crosstab-with-3-columns-for-every-store-in-postgresql, http://stackoverflow.com/**questions/9162497/how-to-**, Subquery for column names of tablefunc crosstab queries, Field count in a RECORD variable - plpgsql. This seems very serious limitation which makes crosstab useless . Can some postgres array function or something like used to split. ... My table has 40 columns and is joining to another table for 1 column, if that makes a difference. The problem is not so much with crosstab as with PostgreSQL inability to deal with dynamic record types or ability to do record introspection. So the only one option for now is to use Dynamic SQL - to build your query dynamically based on data in your table (based on column what should be pivoted).. You can use your client side language to build SQL or inisde DB you could make function what returns "text" as your Dynamic SQL and then execute it from your client... Hm... To me workaround looks as exactly as the same thing? My goal is to open result En excel. However, if a dynamic column blob is accidentally truncated, or transcoded from one character set to another, it will be corrupted. On Wed, 2008-02-13 at 14:04 +0100, Tino Wildenhain wrote: > Well after all you want a CSV not a table. You could shortcut this > with a generic query which creates array out of your "columns" > and join them to a CSV line. Postgres rows to columns without crosstab. Every value not found on either side - not in the raw data or not generated by the 2nd parameter - is simply ignored. Here is a simple example to give some light on how to work with crosstab it. 1) uses Dynamic SQL to bulid query (but returns refcursor insted of text), 2) client still needs to execute 2 commands (second is fetch instead of execute 'result'). So not an option for tables with more than 1600 rows (or fewer). If you try to add an extra column using the basic crosstab option, you'll get this error: "The provided SQL must return 3 columns: rowid, category, and values." CREATE TABLE pivot_test (id integer, customer_id integer, product_code VARCHAR, quantity integer); INSERT INTO pivot_test VALUES (1, 1, 'A', 10); INSERT INTO pivot_test VALUES (2, 1, 'B', 20); INSERT INTO pivot_test VALUES (3, 1, 'C', 30); INSERT INTO pivot_test VALUES (4, 2, 'A', 40); INSERT INTO pivot_test VALUES (5, 2, 'C', 50); INSERT INTO pivot_test VALUES (6, 3, 'A', 60); INSERT INTO pivot_test VALUES (7, 3, 'B', 70); INSERT INTO pivot_test VALUES (8, 3, 'C', 80); INSERT INTO pivot_test VALUES (9, 3, 'D', 90); INSERT INTO pivot_test VALUES (10, 4, 'A', 100);  id | customer_id | product_code | quantityÂ, ----+-------------+--------------+----------,   1 |           1 | A            |       10,   2 |           1 | B            |       20,   3 |           1 | C            |       30,   4 |           2 | A            |       40,   5 |           2 | C            |       50,   6 |           3 | A            |       60,   7 |           3 | B            |       70,   8 |           3 | C            |       80,   9 |           3 | D            |       90,  10 |           4 | A            |      100. , when the structure of the two variables in each cell of the table, it will be.... 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