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SQLize.online is a free online SQL environment for quickly running, experimenting with and sharing code.
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-- Интересная задача, которая помогла мне лучше понять left outer join create table t1( nom integer ); create table t2( nom integer ); /* insert into t1 values (1), (2), (3); insert into t2 values (4), (5), (6), (7); */ insert into t1 values (1), (1), (1); insert into t2 values (1), (1), (1), (1); /* abc */ /*1 2 3*/ select * from t1 left join t2 on t1.nom = t2.nom; -- Минимально вчегда будет 3 строки, максимально будет 12 строк.
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