In Level 7, we looked at optimizing rowgroup elimination for a nonclustered columnstore index. For a clustered columnstore index, the same technique can be used but the steps and syntax change a bit. This will be covered later – but first, let’s take a look at another significant difference between nonclustered and clustered columnstore indexes, […]
2019-03-26 (first published: 2018-06-20)
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In this level, Hugo explains what batch mode execution is, how it differs from row mode execution, and what its limitations are.
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Learn how trusted foreign keys (FK) can help or hurt performance.
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$server = "YourServer" $db = "YourDatabase" $sqlFile = "C:\path\query.sql" $outFile = "C:\path\output.xlsx" # Run...
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Hi everyone I have a 1000 line SQL query that is too long to...