dynamic-sql

I need to select rows from two and more tables ("A", "B"). They have differences columns and I don't use inheritance for it. So. For example: SELECT * FROM "A" UNION SELECT * FROM "B" ERROR: each UNION query must have the same number of columns I can understand why. I try get intersected columns from root schema in root table: SELECT column_name FROM information_schema.columns WHERE table_schema = 'client_root' AND table_name ='conditions' It's ok! But I don't use query: SELECT (SELECT column_name FROM information_schema.columns WHERE table_schema = 'client_root' AND table_name ='conditions')

I have three MYSQL tables, simplified, with following columns: ModuleEntries (MDE_ID) ModuleFields (MDF_ID, MDF_Label) ModuleEntryFieldValues (MFV_ID, MFV_MDE_ID, MFV_MDF_ID, MFV_Value) As you can see from the simplified column list, ModuleEntryFieldValues is the table which states that "for an entry, this field has this value". Now, I would like to retrieve this information in one "flat" recordset. I have managed to get things working, but not entirely to what i want. With the help of a different SO article, I managed to get the dynamic, variable amount of columns to work, by using a cursor.

I have a UDF that splits a character string delimited by a space. As the function loops through each string if it finds a space and makes a split an ordinal number is inserted into the results table in its own column along with the split string. I have pivoted on this ordinal number but of course these numbers change based on the character string. I need to query these ordinal numbers and use them in my pivot. Could someone show me how this could be done with dynamic sql? I have seen examples on different forums but I think this could be more simple than what I've seen. My proceedure is below.

CREATE OR REPLACE FUNCTION drop_now() RETURNS void AS $BODY$ DECLARE row record; BEGIN RAISE INFO 'in'; FOR row IN select relname from pg_stat_user_tables WHERE schemaname='public' AND relname LIKE '%test%' LOOP IF EXISTS(SELECT row.relname.tm FROM row.relname WHERE row.relname.tm < current_timestamp - INTERVAL '90 minutes' LIMIT 1) THEN -- EXECUTE 'DROP TABLE ' || quote_ident(row.relname); RAISE INFO 'Dropped table: %', quote_ident(row.relname); END IF; END LOOP; END; $BODY$ LANGUAGE plpgsql VOLATILE; Could you tell me how to use variables in SELECT which is inside IF EXISTS ? At the present

I have a stored procedure with an nvarchar parameter. I expect callers to supply the text for a sql command when using this SP. How do I execute the supplied sql command from within the SP? Is this even possible?- I thought it was possible using EXEC but the following: EXEC @script errors indicating it can't find a stored procedure by the given name. Since it's a script this is obviously accurate, but leads me to think it's not working as expected. Use: BEGIN EXEC sp_executesql @nvarchar_parameter END ...assuming the parameter is an entire SQL query. If not: DECLARE @SQL NVARCHAR(4000) SET

I writing an application using Oracle 10g. I am currently facing this problem. I take in "filename" as parameter of type varchar2. A sample value that filename may contain is: 'TEST || to_char(sysdate, 'DDD')'. In the procedure, I want to get the value of this file name as in TEST147. When i write: select filename into ffilename from dual; I get the value ffilename = TEST || to_char(sysdate, 'DDD') whick makes sense. But how can I get around this issue and invoke the function in the string value? Help appreciated. Thanks. It's easy enough to dynamically execute a string ... create or replace