Every documented MySQL error with causes, fixes, and code examples. Part of DB Error Reference.
1062 Duplicate Entry1064 SQL Syntax Error1045 Access Denied for User1146 Table Doesn't Exist1451 Foreign Key Constraint Fails on Delete or Update1452 Foreign Key Constraint Fails on Insert1048 Column Cannot Be Null1054 Unknown Column1215 Cannot Add Foreign Key Constraint1205 Lock Wait Timeout Exceeded1213 Deadlock Found When Trying to Get Lock1364 Field Doesn't Have a Default Value