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17 lines
369 B
Plaintext
17 lines
369 B
Plaintext
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CREATE TABLE t1(a,b,c);
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CREATE INDEX t1x1 ON t1(a,b);
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INSERT INTO t1 VALUES(1,NULL,200);
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CREATE TABLE t2(x,y,z);
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INSERT INTO t2 VALUES(1,NULL,55);
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SELECT c FROM t1 WHERE (a,b) IN (SELECT x,y FROM t2 WHERE z==55);
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INSERT INTO t1 VALUES(2,3,400);
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INSERT INTO t2 VALUES(2,3,55);
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SELECT c FROM t1 WHERE (a,b) IN (SELECT x,y FROM t2 WHERE z==55);
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