A、<span style="font-family: 宋体;font-size: 14px"> DROP myindex </span></p><p></p>
B、<span style="font-family: 宋体;font-size: 14px">DROP mytable.myindex </span></p><p></p>
C、<span style="font-family: 宋体;font-size: 14px"> DROP INDEX myindex </span></p><p></p>
D、<p style="line-height:23px"><span style="font-family: 宋体;font-size: 14px">DROP INDEX mytable.myindex</span></p><p></p>
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