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25 lines
614 B
Plaintext
25 lines
614 B
Plaintext
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CREATE TABLE t8(b TEXT, c TEXT);
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INSERT INTO t8 VALUES('a', 'one');
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INSERT INTO t8 VALUES('b', 'two');
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INSERT INTO t8 VALUES(NULL, 'three');
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INSERT INTO t8 VALUES(NULL, 'four');
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SELECT coalesce(b, 'null') || '/' || c FROM t8 x ORDER BY x.b, x.c
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CREATE UNIQUE INDEX i1 ON t8(b);
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SELECT coalesce(b, 'null') || '/' || c FROM t8 x ORDER BY x.b, x.c
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DROP INDEX i1;
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CREATE UNIQUE INDEX i1 ON t8(b, c);
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SELECT coalesce(b, 'null') || '/' || c FROM t8 x ORDER BY x.b, x.c
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CREATE TABLE t2(a, b NOT NULL, c);
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CREATE UNIQUE INDEX t2ab ON t2(a, b);
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CREATE UNIQUE INDEX t2ba ON t2(b, a);
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