Endi Zhupani is a university graduate from Tirana with a degree in Information Systems. He currently works for Pragmatic Software, a company in Tirana that develops transaction and operation management systems as web applications. Throughout his entire development experience, Q&A and blog posts from other developers have saved my day more times that he can count, so he thought he’d start giving back by writing about my work and solutions he has come up with for some interesting problems.

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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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