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For side-by-side syntax and behavior across database engines, browse the cross-database SQL comparison guides.

MySQL Error 1062: Fix Duplicate Entry for Key

Diagnose MySQL Error 1062 by finding the conflicting primary or unique key and choosing whether to reject, ignore, or update the duplicate row.

MySQL Error 1064: Fix SQL Syntax Errors

Diagnose MySQL Error 1064 by checking the reported token, missing punctuation, reserved identifiers, quoting, and server-version syntax.

MySQL Error 1093: You Can't Specify Target Table for Update

Fix MySQL Error 1093 by rewriting a self-referencing UPDATE with a self-join or a materialized derived table.

MySQL Error 1175: Safe Update Mode

Fix MySQL Error 1175 with a key-based WHERE clause or a carefully limited update, and check sql_safe_updates for the current session.

MySQL Error 1205: Lock Wait Timeout Exceeded

Troubleshoot MySQL Error 1205 by finding the lock blocker, checking InnoDB wait state, and safely handling retries.

MySQL Error 1206: Lock Table Full

Fix MySQL Error 1206 by shrinking oversized transactions, batching row changes, checking query indexes, and sizing the InnoDB buffer pool.

MySQL Error 1213: Deadlock Found When Trying to Get Lock

Fix MySQL Error 1213 by retrying the rolled-back transaction, inspecting the latest deadlock, and keeping lock order consistent.

MySQL Error 1264: Out of Range Value for Column

Fix MySQL Error 1264 by checking the column’s numeric range, correcting the input, or safely changing the data type for valid values.

MySQL Error 1364: Field Doesn't Have a Default Value

Fix MySQL Error 1364 by supplying a required column value or defining an appropriate default; check strict SQL mode and the table schema.

MySQL Error 1406: Data Too Long for Column

Diagnose MySQL Error 1406 by checking character length, column size, character set, and strict SQL mode before changing data or schema.