SQLҵ
1.Ƚѹsmsѹ
2.ֱӸݿ⼴
3.ҪǶĿ԰ѱͼݿȫСעԶֵҪֶ

ע:ݿ쳣ֹͣŷҲֹ֮ͣȻݿWINSMS