Two browser tabs, two default addresses. Here is how a filtered unique index keeps the rule in the database and how to switch defaults safely.
TempDB Operating System Error 3: Fix a Wrong TempDB Path
TempDB operating system error 3 means a tempdb file path cannot be found, for example after a typo in a move. This post reproduces the error safely, shows how error 3 differs from error 2 and lists the repair steps when the service will not start.
Performance Troubles – Function on Date Variable – SQL in Sixty Seconds #192
However, I have a really good reason to use that. Today we are going to discuss Performance Troubles – Function on Date Variable.
Performance: Between and Other Operators – SQL in Sixty Seconds #191
If we use BETWEEN what will be the impact of performance. Let us watch Performance: Between and Other Operators.
Most Used Database Files – SQL in Sixty Seconds #190
If a client has many databases, this script finds the most used database files. Here is my SQL in Sixty Seconds video on it.
Reads and Writes per File: Rank Files by Bytes Moved
Reads and writes per file show which data or log file SQL Server uses the most. This post ranks the files of a demo database by bytes moved with sys.dm_io_virtual_file_stats and explains what the tally can and cannot tell you.
Optimize DATE in WHERE Clause – SQL in Sixty Seconds #189
During Comprehensive Database Performance Health Check, I often get questions about how to Optimize DATE in the WHERE Clause.
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.
Recovering One Dropped Table From a Full Backup
Recover one dropped table through a separate restored database, choose the recovery point, copy its data, and rebuild the table rules.
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.