Technical Article

Dynamic SQL inside User defined functions

The script details about the workaround for using Dynamic SQL inside T-SQL user defined functions. Basically, T-SQL doesn't allow developers to perform/write any actions/statments which would affect the database's state. As a key note factor for any migration process from oracle to sql server developers need to do a work around on using execute immediate(for […]

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2007-04-18 (first published: )

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Question of the Day

STRING_AGG's behavior

Executing the following script (Sql Server 2022), you get the table t0 with 10 rows:
CREATE TABLE t0
( id     INT PRIMARY KEY
, field1 VARCHAR(1000)
, field2 VARCHAR(MAX));
INSERT INTO t0
SELECT
  gs.value
, REPLICATE ('X', 1000)
, REPLICATE ('Y', 1000)
FROM generate_series(1, 10, 1) gs;
GO
What happens if you execute the following statements?
  1. select STRING_AGG(field1, ';') within group (order by id)  from t0;
  2. select STRING_AGG(field2, ';') within group (order by id)  from t0;

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