A、<span style="font-size:16px;font-family: 宋体">DML </span><span
C、<span style="font-size:16px;font-family: 宋体">DQL</span>
D、<span style="font-size:16px;font-family: 宋体">DDL</span><span style="font-size:16px;font-family: 宋体">定义</span>
style="fon、<span style="font-size:16px;font-family: 宋体">DCL </span><span style="font-size:16px;font-family: 宋体">控制</span>