SQL Query Optimisation
Charl Van Zyl
Rewriting slow or broken SQL: reading query profiles, removing redundant joins and scans, using CTEs, window functions and QUALIFY, and delivering clean, tested queries with a plain-English explanation of the change.
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Posted Oct 20, 2026
Rewriting slow or broken SQL: reading query profiles, removing redundant joins and scans, using CTEs, window functions and QUALIFY, with clean, tested queries.
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