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2790
create table t1 (id int not null default '0');
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2791
insert into t1 values (123),(191),(192);
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2793
insert into t2 values ('58013'),('58014'),('58015'),('58016');
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2795
insert into t3 values (123,null),(123,null),(123,null),(123,null),(123,null),(123,'58013');
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from t1 inner join (t3 left join t2 on t2.id = t3.b_id) on t1.id = t3.a_id;