You have an error in your SQL syntax; check the manual that corresponds to your MySQL server
    version for the right syntax to use near
    sql语句 

    1. DELETE FROM test t  WHERE t.abc = 'abc'

    原因：再删除语句中加了别名了
    两种解决办法：
    第一种：去掉别名 

    1. DELETE FROM test  WHERE abc = 'abc'

    第二种：
    在delete 后加上别名

    1. DELETE t FROM test t  WHERE t.abc = 'abc'