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22 lines
642 B
MySQL
22 lines
642 B
MySQL
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CREATE TABLE user(id UInt32, name String) ENGINE = Join(ANY, LEFT, id);
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INSERT INTO user VALUES (1,'U1')(2,'U2')(3,'U3');
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CREATE TABLE product(id UInt32, name String, cate String) ENGINE = Join(ANY, LEFT, id);
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INSERT INTO product VALUES (1,'P1','C1')(2,'P2','C1')(3,'P3','C2');
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CREATE TABLE order(id UInt32, pId UInt32, uId UInt32) ENGINE = TinyLog;
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INSERT INTO order VALUES (1,1,1)(2,1,2)(3,2,3);
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SELECT ignore(*) FROM (
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SELECT
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uId,
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user.id as `uuu`
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FROM order
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LEFT ANY JOIN user
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ON uId = `uuu`
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);
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SELECT ignore(*) FROM order
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LEFT ANY JOIN user ON uId = user.id
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LEFT ANY JOIN product ON pId = product.id;
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