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63 lines
1.1 KiB
Plaintext
63 lines
1.1 KiB
Plaintext
-- { echoOn }
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SELECT 'Union constants';
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Union constants
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SELECT 1 UNION ALL SELECT 1;
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1
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1
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SELECT '--';
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--
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SELECT 1 UNION DISTINCT SELECT 1 UNION ALL SELECT 1;
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1
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1
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SELECT '--';
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--
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SELECT 1 INTERSECT SELECT 1;
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1
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SELECT '--';
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--
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SELECT 1 EXCEPT SELECT 1;
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SELECT '--';
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--
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SELECT id FROM (SELECT 1 AS id UNION ALL SELECT 1);
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1
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1
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SELECT 'Union non constants';
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Union non constants
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SELECT value FROM (SELECT 1 as value UNION ALL SELECT 1 UNION ALL SELECT 1);
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1
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1
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1
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SELECT '--';
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--
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SELECT id FROM test_table UNION ALL SELECT id FROM test_table;
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0
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0
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SELECT '--';
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--
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SELECT id FROM test_table UNION DISTINCT SELECT id FROM test_table;
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0
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SELECT '--';
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--
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SELECT id FROM test_table INTERSECT SELECT id FROM test_table;
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0
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SELECT '--';
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--
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SELECT id FROM test_table EXCEPT SELECT id FROM test_table;
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SELECT '--';
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--
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SELECT id FROM (SELECT id FROM test_table UNION ALL SELECT id FROM test_table);
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0
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0
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SELECT '--';
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--
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SELECT id FROM (SELECT id FROM test_table UNION DISTINCT SELECT id FROM test_table);
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0
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SELECT '--';
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--
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SELECT id FROM (SELECT id FROM test_table INTERSECT SELECT id FROM test_table);
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0
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SELECT '--';
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--
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SELECT id FROM (SELECT id FROM test_table EXCEPT SELECT id FROM test_table);
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