A very popular question we will answer today Where are Table Variables Stored? Recently I have posted a few videos on my YouTube Channel,
Creating Covering Index to Eliminate Join – SQL in Sixty Seconds #090
How to improve performance so today we are going to see a video about creating converting index to eliminate join and improve query performance.
SQL SERVER – 7 Follow Up Answers to Remove Bookmark Lookup
My video on bookmark lookups brought many questions. Here are 7 follow up answers to remove bookmark lookup doubts, starting with STATISTICS IO overhead.
Temp Tables For Destruction: Why the Counter Stays Near Zero
The Temp Tables For Destruction counter stays flat at zero while Temp Tables Creation Rate moves, and that confuses people. This post explains what each counter counts, reads both from T-SQL, measures a creation loop, and shows that a cached temp table in a procedure moves neither counter.
Remove Bookmark Lookup – SQL in Sixty Seconds #089
We fixed the query performance by removing the bookmark lookup. Let us learn about that in today’s blog post, how we can fix this issue.
Identify Index Used for Query – SQL in Sixty Seconds #088
How do you identify index used for query? It is a popular question in my health checks, and this SQL in Sixty Seconds video shows the easy way.
Query Percentage Complete: Watch a Long Query Finish
Query percentage complete is not a column in any view, but sys.dm_exec_query_profiles reports how many rows each operator has produced against the plan’s estimate. This post builds a monitor query for a running statement, explains why a percentage can pass 100 or even run into the thousands, and shows which operators to trust.