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create table asd(name int check(name=1), age int(1)primary key); create table qwe(mane int, gae int(1) references asd(age)); create table pow(aa int); insert into asd values(1,2); insert into qwe values(1,2); insert into pow values(1); select name, age from asd inner join qwe on asd.name=qwe.mane right join pow on pow.aa=asd.name; desc asd; desc qwe; alter table asd drop constraint name; show create table asd;
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