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TSQL Tuesday #188 Growing community

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How a Legacy Logic Choked SQL Server in a 30-Year-Old Factory

By Chandan Shukla

Comments posted to this topic are about the item How a Legacy Logic Choked...

do i lose "what this object depends on" etc when moving sprocs to etl server

By stan

Hi i was surprised to see the approach my coworkers used to sunset talend...

People Make Odd Choices

By Grant Fritchey

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Question of the Day

Query Plan Regressions --

For the Question of the day, I am going to go deep, but try to be more clear, as I feel like I didn't give enough info last time, leading folks to guess the wrong answer... :) For today's question:  You’re troubleshooting a performance issue on a critical stored procedure. You notice that a previously efficient query now performs a full table scan instead of an index seek. Upon investigating, you find that an NVARCHAR parameter is being compared to a VARCHAR column in the WHERE clause. What is the most likely cause of the query plan regression?

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