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1) Oracle 多表更新方法:
Oracle语法: UPDATE updatedtable SET (col_name1[,col_name2...])= (SELECT col_name1,[,col_name2...] FROM srctable [WHERE where_definition])
例子:UPDATE A a SET (a.a1,a.a2)=(SELECT b.b1,b,b2 FROM B b WHERE b.b3=a.a3)
2) MySql多表更新方法:
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