mysql error when deleting records

I found a strange error when deleting a record on the sql command line

The following statement can be executed normally:

delete from   t_mid_test_convention  where convention_id=33;

 But the following syntax error is reported:

delete from   t_mid_test_convention as mt2 where mt2.convention_id=33;

 

 

mysql>
mysql> delete from   t_mid_test_convention as mt2 where mt2.convention_id=33;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'as mt2 where mt2.convention_id=33' at line 1
mysql> delete from   t_mid_test_convention as mt2 where mt2.convention_id=33;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'as mt2 where mt2.convention_id=33' at line 1
mysql> delete from   t_mid_test_convention  where convention_id=33;
Query OK, 0 rows affected (0.20 sec)

 Database version:

Server version: 5.5.41-MariaDB MariaDB Server

 

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