Question: Can an Index Reduce Performance of SELECT Query? There is a huge misconception that Indexes does not impact SELECT queries negatively.
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Dynamic SQL Temp Table: Why It Disappears and How to Keep It
A dynamic SQL temp table is dropped when its dynamic batch ends, so the main code cannot read it. A global temp table keeps the data, and a per session name keeps it safe. Every step is tested, including the second session clash.
msdb Upgrade Error 916: Fix the Database Owner
A msdb upgrade error can stop the service at the last upgrade step. The post reads the ERRORLOG, shows a read-only owner check, and walks through the four steps that fix the owner of msdb. The fix is one ALTER AUTHORIZATION statement.
SQL Agent Job Backslash Puzzle: Why Both Rows Were Deleted
A SQL Agent job backslash at the end of a comment line can turn a one row delete into a delete of the whole table. This puzzle sets up the job, explains the cause and tests the effect in T-SQL. It ends with a safe way to write the step.
Disable Resource Governor: Why RECONFIGURE Turns It On
To disable Resource Governor, run ALTER RESOURCE GOVERNOR DISABLE. The post shows why RECONFIGURE enables the feature, with a tested script that restores the state it finds. It also explains how saved pool limits come back to life.
SQL SERVER – Swap Column Values In Table
Here is a question asked to me during Comprehensive Database Performance Health Check. The question was about how to swap column values in a table.
SQL SERVER – Microsoft Official Support End Dates for Different Versions
SQL Server Support end dates belong in upgrade planning before the deadline. My original post followed the July 2019 support transition.
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