Decoding MySQL INSERT SELECT Errors: From Syntax Traps to Data Truncation (Error 1265)

Ever encountered frustrating syntax errors or the 'Data truncated' (Error 1265) message when copying data between tables using MySQL's `INSERT INTO ... SELECT`? This article dives deep into these two common issues, from incorrect parenthesis usage to column length mismatches. We provide clear diagnostic steps and practical solutions to help you master your data migration tasks.