The information schema is the slow and sure way: it is standardized and largely portable to other databases that support it. However, views in the information schema often join in many tables from the system catalogs to meet a strictly standardized format - many of which are … To adjust the values in columns like GDP or Dividends, you may automate this with a dynamic UPDATE similarly to the CREATE TABLE, if the columns that need the updates exist under identical names in all these tables (but that seems unlikely except if the schema was designed up-front with this constraint in mind). Here Client1, Client2... are the values from the database. These queries can be DDL, DCL, and/or DML statements. The function works, but I need a different one for every table we want to produce the clipping. Unlike the static SQL statement, a dynamic SQL statements’ full text is unknown and can change between successive executions. SQL Server definitely executed the empty string correctly. I've tried several ideas and searched all over looking for a solution. my column name stored in another table. CREATE OR REPLACE FUNCTION update() RETURNS VOID AS $$ DECLARE cur SCROLL CURSOR FOR select * from my_tbl; r1 RECORD; BEGIN OPEN cur ; FOR counter IN 2000..2017 … Employee Name Client1 Client2 Client3 Client4 Emp1 100 102 90 23 Emp2 56 0 23 98 Emp3 34 45 76 0. Is there any way in postgres to write a query to display the result in matrix form. I did not mention that originally, just to keep the question short. Thanks, Jyoti Assign to NEW by key in a Postgres trigger; How to set value of composite variable field using dynamic SQL Anything that is not an actual column name is not returned. If so, you have to do that outside the dynamic SQL string, in the format argument list. You do not have an easy way to just check a "variable column". ). I'm trying to write a function that uses dynamic column names to fetch the results within those columns. columnname. I have written the following, however, the result is the name of the column, not the value within the column. (where column names are dynamic) For eg. Passing column names dynamically for a record variable in PostgreSQL (1) . Using PostgreSQL, column values from a table for 1st record are stored in a record variable. Does anyone know if there is one? I want to display my dynamic column value in select query. "if the column name is null, use the column name col instead"? gives the value of the column name specified. If you found this article useful, make sure to check out the book Learning PostgreSQL 10, to learn the fundamentals of PostgreSQL 10. @GustavoAdolfo Hang on, are you trying to coalesce the column name, i.e. – … But there are ways around this limitation: Proof of concept. There is a (not very elegant) way of achieving this result, by using a CASE:. select ColumnName from LCompanySpecificColumns CSC where CSC.Label='Duration' and CSC.CompanyCode = 'DE' and CSC.TableName = 'LProducts' and … for ex: let the variable be: recordvar recordvar. And dynamic field names are currently not possible, neither in SQL nor PL/pgSQL. It turns out I was using an incorrect query to build the dynamic SQL and as such built an empty string. But values are better provided with the USING clause. I have looked into the All field names and types are the same, only geom is updated and clipped_geom_wkt is added. Note that the reason I need this to occur, rather than simply hard coding the column names, is that the column names are user configurable. And it will keep working across major versions. Column names cannot be dynamic, so format the query (with format() for convenience) and use EXECUTE. 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