SQL/数据库错误错误
MySQL 1452MySQL 1452 — Cannot Add or Update Child Row
A foreign key prevents adding a child row because the parent does not exist.
mysql
查看详情 55P03The requested lock could not be acquired without waiting.
A NOWAIT lock request failed because another transaction holds a conflicting lock.
Retry after a delay. Increase lock_timeout. Remove NOWAIT if waiting is acceptable. Investigate the blocking transaction.
MySQL 1452A foreign key prevents adding a child row because the parent does not exist.
SQLITE_PERM (3)The requested access mode for the database file is not allowed.
54001The SQL statement is too complex for the database to process.
SQLITE_AUTH (23)The authorizer callback denied the operation.
42846The value cannot be automatically converted to the required type.
42702A column reference is ambiguous because it exists in multiple tables.