17 lines
272 B
SQL
17 lines
272 B
SQL
CREATE TABLE t1(a, b);
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CREATE INDEX i1 ON t1(a);
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INSERT INTO t1 VALUES('aaa',1);
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INSERT INTO t1 VALUES('ccc',3);
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SELECT b FROM t1
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WHERE a IN ('aaa','ccc');
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ALTER TABLE t1 DROP COLUMN b;
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CREATE INDEX idx2
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ON t1(a COLLATE NOCASE)
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WHERE a IS NOT NULL;
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SELECT * FROM t1; |