Answer
Before rewriting a query:
- Check execution plan
- Validate statistics
- Check indexes
- Identify costly operators
- Try small predicate adjustments
- Confirm rewrite is necessary
Most problems are fixed by plan adjustments, not rewrites.
Quick Answer
Before rewriting: capture the actual execution plan and compare estimated vs actual rows. Check wait stats and blocking. Look at logical reads (SET STATISTICS IO ON). Identify the highest-cost operators. Update statistics and check for missing indexes first — often fixes the query without any rewrite. Rewrite only after understanding the root cause.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ