Does creating non clustered index impact my sql query ?
I create a soft and it getting slower and slower when i run my sql query. I found a way to analyze my query and the result is that i should create non clustered index. I'm far from a pro in SQL so i dont know the impact on my code. Did i have to rewrite some query or just run the script MSSMS already give me ?
Yep. If you want to address all the performance issues at once, instead of having to constantly create and maintain "covering indexes", run the code below.
The nonclustered index on CatItem is optional,
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