insert into hh (fielda,fieldb,fieldc) select fieldx,fieldy,fieldz from mm---更新计量点中不存在的数据,将台帐中的信息转移到计量点中insert into MetricPoints (MeterID,MetricPointName,[Description],DepartmentID,MediumID)(SELECT m.MeterID,m.MetricItems+m.InstallPlace as m_MetricPointName,m.MetricItems,m.DepartmentID,m.MediumID FROM Meters m WHERE NOT EXISTS (SELECT 1 FROM MetricPoints WHERE MetricPoints.MeterID = m.MeterID ) and m.MediumID =2)声名：a,b ,都是表--b表存在（两表结构一样）insert into b select * from a若两表只是有部分（字段）相同，则insert into b(col1,col2,col3,col4,...) select col1,col2,col3,col4,... from a where...把表a插入到表b中去。--b表不存在select * into b from a//select (字段1，字段2，...) into b from asql将一个表中的数据插入到另一个表中,布布扣,bubuko.com
原文：http://www.cnblogs.com/LessNull/p/3708577.html