Validate codes, email shapes and phone numbers with REGEXP_LIKE in SQL Server 2025, using clear patterns and CHECK constraints.
SQL SERVER – 2005/2000 Examples and Explanation for GOTO
How the GOTO statement jumps to a label in the same T-SQL batch. My explanation for GOTO covers the syntax, the rules and when I still use it.
SQL SERVER – Creating Comma Separate Values List from Table – UDF – SP
Three ways to build a Comma Separate Values List from a table: COALESCE, a smart SELECT, or a cursor. Written for SQL Server 2005 with VARCHAR(MAX).
SQL SERVER – UDF – Function to Convert List to Table
A UDF, udf_List2Table, to convert list to table with any delimiter you choose. Written for SQL Server 2005 with VARCHAR(MAX), and easy to adapt for 2000.
SQL SERVER – 2005 Enable CLR using T-SQL script
In SQL Server 2005 the CLR is off by default. Here is the sp_configure script to enable CLR, turning on show advanced options and then clr enabled.
SQL SERVER – UDF – User Defined Function to Find Weekdays Between Two Dates
A user defined function that returns the number of weekdays between two dates, skipping Saturday and Sunday. It was written by Alexander Chigrik.
ASIN: A Sine Ratio Does Not Recover Every Original Angle
ASIN returns an angle from a sine ratio. Preserve the original branch, use explicit units and keep invalid or missing ratios visible.
What Is a Heap in SQL Server?
A heap in SQL Server is a table with no clustered index. Forwarded records pushed one count from 11,113 reads to 199,844, and a single REBUILD put it back. When a heap is fine and when it is not.
SQL SERVER – What DBCC Memory Cache Commands Actually Clear
SQL Server retains memory caches to support later work. I investigate memory pressure before trying to release them.
SQL SERVER – Enable Login – Disable Login using ALTER LOGIN – Change name of the ‘SA’
ALTER LOGIN can enable, disable or rename a SQL Server login. I verify another administrative access path before changing sa.