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--TRY
insert tb3
select newid(), a.name1,b.name2 from tb1 a,tb2 b where a.name1=1 and b.name1=2
INSERT INTO tb3
SELECT NEWID(), t1.ID, t2.ID
FROM
(SELECT ID FROM tb1 where Name1=1) t1,
(SELECT ID FROM tb2 where Name1=2) t2,
insert into tb3
select newid name1,name2 from tb1 where name1=1
union all
select newid name1,name2 from tb2 where name1=2