Effectively mapping primary key – foreign key relations
This script maps the primary key - foreign key relations regardless if the column names are the same or not.
2012-05-15 (first published: 2007-11-07)
2,929 reads
John Liu
2008-09-05 (first published: 2008-07-10)
2,678 reads
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STRING_AGG's behavior
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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;
GOWhat happens if you execute the following statements?
select STRING_AGG(field1, ';') within group (order by id) from t0;
select STRING_AGG(field2, ';') within group (order by id) from t0;