Architect
Apr 29, 2025 · Databases
Lessons Learned from Misusing INSERT INTO SELECT in MySQL Data Migration
A real‑world MySQL data‑migration case study shows how using INSERT INTO SELECT without proper indexing caused a full table scan, OOM errors, and data loss, and explains how to avoid the pitfall by adding appropriate indexes and understanding transaction locking.
Full Table ScanINSERT INTO SELECTIndexing
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