Triggers come in two kinds, Instead of and After. Here is how an Instead of Trigger can intercept an insert, update or delete on a table, with an example.
SQL Server emergency? Email pinal@sqlauthority.com with URGENT in the subject line.
TRIM Function in SQL Server: SQL in Sixty Seconds #040
The TRIM function removes spaces from the ends of a string, and SQL Server has had it since 2017. The tests here show which characters TRIM leaves behind, the LEADING and TRAILING keywords, and a WHERE clause that read 884 pages against 3.
SharePoint Conference Singapore 2013: A Great Experience
I had the great pleasure of presenting at SharePoint Conference Singapore 2013, my second visit to the event. I shared three database tips in a session inspired by SQL in Sixty Seconds, and the room overflowed. Here is my recap, with photographs.
Grandfather-Father-Son Retention: Choosing Which Backups to Keep
Which backups survive when you keep three days, two weeks and two months? A small query answers it, and then you check the real files.
Designing a Date Dimension
A date dimension makes reporting calendars explicit with fiscal periods, holidays, weekdays, and a repeatable SQL Server build script.
Why Table Size Numbers Disagree: Reserved, Used and Unused Space
Reconcile table size reports by reading reserved, used, data, index, and unused pages from sys.dm_db_partition_stats on SQL Server.
SQL SERVER – A List of Various SQL Server RTM and Service Pack Number
Which SQL Server version are you running, and is it the latest? My list of RTM and Service Pack Number values to check your production server against.
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