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Developer-C 11.1
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create table PROD(id int, vendor int PRIMARY KEY (ID,Vendor)); create table PRODX(id int, vendor int);
insert into PRODX values (1,1),(1,2),(1,3), (2,1),(2,1),(2,3); insert into PROD select distinct * from PRODX x where not exists ( select 1 from PROD p where p.ID=x.ID and p.Vendor=x.Vendor ); select * from PRODX; select * from PROD;
id
vendor
1
1
1
2
1
3
2
1
2
1
2
3
id
vendor
1
1
1
2
1
3
2
1
2
3