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17 lines
589 B
Plaintext
17 lines
589 B
Plaintext
drop table if exists t1,t2;
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create table t1 (id int not null, f_id int not null, f int not null,
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primary key(f_id, id)) engine=innodb;
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create table t2 (id int not null,s_id int not null,s varchar(200),
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primary key(id)) engine=innodb;
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INSERT INTO t1 VALUES (8, 1, 3);
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INSERT INTO t1 VALUES (1, 2, 1);
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INSERT INTO t2 VALUES (1, 0, '');
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INSERT INTO t2 VALUES (8, 1, '');
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commit;
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DELETE ml.* FROM t1 AS ml LEFT JOIN t2 AS mm ON (mm.id=ml.id)
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WHERE mm.id IS NULL;
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select ml.* from t1 as ml left join t2 as mm on (mm.id=ml.id)
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where mm.id is null lock in share mode;
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id f_id f
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drop table t1,t2;
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