Puzzle

External Article

Databases and Dominoes

  • Article

A Dominoes game of Texas 42 inspires Joe Celko to explore unusual uses for check constraints and views. Sometimes, the best way of discovering useful SQL techniques is to tackle the more unusual problems.

2013-09-19

2,976 reads

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Question of the Day

Using table variables in T-SQL

What happens if you run the following code in SQL Server 2022+? 

declare @t1 table (id int);

insert into @t1 (id) values (NULL), (1), (2), (3);

select count(*)
from @t1
where @t1.id is distinct from NULL;
 

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