If we use BETWEEN what will be the impact of performance. Let us watch Performance: Between and Other Operators.
Splitting OR Conditions Into UNION ALL for Index Seeks
Test splitting OR conditions into disjoint UNION ALL branches, preserve NULL behavior and row identity, and compare actual index access.
Data Compression for Performance – SQL in Sixty Seconds #188
Earlier I wrote a blog post about how Data Compression for Performance can help improve the efficiency of SQL Server.
ZIP Codes Stored as int: Lost Zeros and How to Repair Them
An int column turns 01234 into 1234 and never gives the zero back. Here is how to fix the column, and how to repair old rows without guessing.
tempdb-Heavy Queries: Finding Them in Query Store
The tempdb spike is over before you log in. Query Store remembers who caused it, and here is how to ask.
Scalar Subqueries: An Empty Input Produces NULL
Scalar subqueries contribute one value to an outer row. Keep row absence separate from a present NULL and enforce the at-most-one-row contract.
Get Current Time Zone – SQL in Sixty Seconds #187
Lots of people often ask me how to get the current time zone in SQL Server when I am working on Comprehensive Database Performance Health Check.