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Developer-C 11.1
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CREATE TABLE Table1( PN varchar(20) , SN varchar(20) ,Num varchar(20) ); CREATE TABLE Table2( PN varchar(20) , SN varchar(20) , Num varchar(20) ); INSERT INTO Table1(PN,SN,Num) VALUES ('A0001', 'S0001','1') , ('A0001', 'S0002','0') , ('A0001', 'S0003','0') , ('A0002', 'S0004','1') INSERT INTO Table2(PN,SN,Num) VALUES ('A0001', 'S0005','1') , ('A0001', 'S0006','0') , ('A0001', 'S0007','0') , ('A0002', 'S0008','0') select PN,SN,Num from (select PN,SN,Num from Table1 UNION select PN,SN,Num from Table2) as A where A.Num='1'
PN
SN
Num
A0001
S0001
1
A0001
S0005
1
A0002
S0004
1