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using same table multiple times in SQL SCRIPT using amdp

Apr 25 at 04:36 PM


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i created a amdp where i have used a single table multiple times to fetch same columns distinct values into different fields.So my question is doing so does it effects any performance?

2)i have also joined nearly 9 tables in a single join does it effects any performance in sql does i should break it into multiple tables and write the select.

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