26 lines
827 B
Plaintext
26 lines
827 B
Plaintext
create database join_on
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use join_on;
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create table t1 (a int , b int);
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create table t2 (c int , d int);
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create table t3 (e int , b int);
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select * from t1 left join (t2 left join t3 on c+1=e) on t1.b=t3.b;
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select * from t1 left join (t2 left join t3 on d+1=e) on t1.b=t3.b;
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select * from t1 left join (t2 left join t3 on d+1=b) on t1.b=t3.b;
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select * from t1 left join (t2 left join t3 on c+1=b) on t1.b=t3.b;
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create table t_1 (a1 int, a2 int);
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create table t_2 (a1 int, b int);
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create table t_3 (c1 int, c2 int);
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create table t_4 (c2 int);
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insert into t_1 values (1,1);
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insert into t_2 values (1,1);
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insert into t_3 values (1,1);
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insert into t_4 values (1);
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select * from t_3 join (t_1 join t_2 using (a1)) on b=c1 join t_4 using (c2);
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# duplicated join using
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select * from t1 join t3 using(b, b, b);
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drop database join_on
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