发布时间:2014-05-19 11:46:19
一、insert(增)1、将一个表的某些字段重新建为一个表insert into `tbnamea`(a,b,c) select a,b,c from `tbnameb`二、delete(删)1、删除表中多余的重复记录,重复记录是根据单个字段(peopleid)来判断,只留有rowid最小的记录delete from tbname where peopleid in (select peopleid from tbname group by peopleid.........【阅读全文】
发布时间:2014-05-06 11:20:27
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发布时间:2014-05-04 11:24:51
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