Relational databases go out of their way to execute SQL, however bad the crimes against Codd and relational theory within the query might be. The 'conditional join' can be executed, but at great cost. As always, it is much better to sit back and restate the problem in a set-based way - Dwain Camps explains.
2015-10-02
7,474 reads
Using wildcard to find patterns in strings going from the basics to some more complicated conditions.
2017-02-10 (first published: 2015-09-29)
19,306 reads
2015-09-24
1,723 reads
2015-09-23
1,677 reads
2015-09-22
1,573 reads
Before SQL Server had SQL window functions, SQL Server developers had to use all manner of tricks and algorithms to come up with ways to rapidly process large amounts of data. Do we need these techniques now that we can express a SQL task in terms of window functions? Kathi revisits a famous SQL challenge to find out.
2015-09-18
4,213 reads
2015-09-30 (first published: 2015-09-17)
1,776 reads
2015-09-15
1,801 reads
2015-09-14
1,901 reads
2015-09-03
1,917 reads
By Steve Jones
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In SQL Server 2025, I have a table (dbo.UserPermission) that contains this data:
UserID UserPermissions 15 23 37What is returned when I run this code:
select bit_count(UserPermissions) as PermissionCount from dbo.UserPermission where UserID = 3;See possible answers