Since NULL represents an unknown value, looking for values in the outer table that are not unknown (i.e. employees’ ids that are not in a list that contains NULL values) would return 0 rows.
11 August 2019
NOT IN and NULL ( a dangerous combination)
Since NULL represents an unknown value, looking for values in the outer table that are not unknown (i.e. employees’ ids that are not in a list that contains NULL values) would return 0 rows.
07 August 2019
Subscribe to:
Posts (Atom)
-
Page Types There are several types of database pages: Data Page details how the data is stored inside the data files, database. I... -
1 Installation, Updates and Patches Ensure Latest SQL Server Service Packs and Hotfixes are Installed SELECT SERVERPROPERTY('Produc...
-
https://ittutorial.org/sql-server-dba-scripts-all-in-one-useful-database-administration-scripts/ Stored Procedure – Clean Cache and C...