- Original T-SQL used a cursor to iterate and update holdings row-by-row. - Rewritten as single UPDATE statement — set-based is 10-100x faster. - @@ROWCOUNT replaced with GET DIAGNOSTICS for row ...
- Original used sp_executesql with parameter sniffing. - Static query is faster and safer — no injection risk. - JOIN to StockItemHoldings for inventory level in single call.
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