1998-05-29 15:23:02 +02:00
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--
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2000-10-05 21:11:39 +02:00
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-- UNION (also INTERSECT, EXCEPT)
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1998-05-29 15:23:02 +02:00
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--
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-- Simple UNION constructs
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SELECT 1 AS two UNION SELECT 2;
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SELECT 1 AS one UNION SELECT 1;
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SELECT 1 AS two UNION ALL SELECT 2;
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SELECT 1 AS two UNION ALL SELECT 1;
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SELECT 1 AS three UNION SELECT 2 UNION SELECT 3;
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SELECT 1 AS two UNION SELECT 2 UNION SELECT 2;
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SELECT 1 AS three UNION SELECT 2 UNION ALL SELECT 2;
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SELECT 1.1 AS two UNION SELECT 2.2;
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-- Mixed types
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SELECT 1.1 AS two UNION SELECT 2;
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SELECT 1 AS two UNION SELECT 2.2;
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2000-10-05 21:11:39 +02:00
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SELECT 1 AS one UNION SELECT 1.0;
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1998-05-29 15:23:02 +02:00
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SELECT 1.1 AS two UNION ALL SELECT 2;
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2000-10-05 21:11:39 +02:00
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SELECT 1.0 AS two UNION ALL SELECT 1;
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1998-05-29 15:23:02 +02:00
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2000-10-05 21:11:39 +02:00
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SELECT 1.1 AS three UNION SELECT 2 UNION SELECT 3;
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1998-05-29 15:23:02 +02:00
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2000-10-05 21:11:39 +02:00
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SELECT 1.1 AS two UNION SELECT 2 UNION SELECT 2.0;
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1998-05-29 15:23:02 +02:00
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2000-10-05 21:11:39 +02:00
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SELECT 1.1 AS three UNION SELECT 2 UNION ALL SELECT 2;
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SELECT 1.1 AS two UNION (SELECT 2 UNION ALL SELECT 2);
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1998-05-29 15:23:02 +02:00
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--
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-- Try testing from tables...
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--
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SELECT f1 AS five FROM FLOAT8_TBL
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UNION
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SELECT f1 FROM FLOAT8_TBL;
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SELECT f1 AS ten FROM FLOAT8_TBL
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UNION ALL
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SELECT f1 FROM FLOAT8_TBL;
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SELECT f1 AS nine FROM FLOAT8_TBL
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UNION
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SELECT f1 FROM INT4_TBL;
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SELECT f1 AS ten FROM FLOAT8_TBL
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UNION ALL
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SELECT f1 FROM INT4_TBL;
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SELECT f1 AS five FROM FLOAT8_TBL
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WHERE f1 BETWEEN -1e6 AND 1e6
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UNION
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SELECT f1 FROM INT4_TBL
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WHERE f1 BETWEEN 0 AND 1000000;
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SELECT f1 AS five FROM VARCHAR_TBL
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UNION
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SELECT f1 FROM CHAR_TBL;
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SELECT f1 AS three FROM VARCHAR_TBL
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UNION
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SELECT TRIM(TRAILING FROM f1) FROM CHAR_TBL;
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SELECT f1 AS eight FROM VARCHAR_TBL
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UNION ALL
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SELECT f1 FROM CHAR_TBL;
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SELECT f1 AS five FROM TEXT_TBL
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UNION
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SELECT f1 FROM VARCHAR_TBL
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UNION
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SELECT TRIM(TRAILING FROM f1) FROM CHAR_TBL;
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2000-10-05 21:11:39 +02:00
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--
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-- INTERSECT and EXCEPT
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--
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SELECT q2 FROM int8_tbl INTERSECT SELECT q1 FROM int8_tbl;
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SELECT q2 FROM int8_tbl INTERSECT ALL SELECT q1 FROM int8_tbl;
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SELECT q2 FROM int8_tbl EXCEPT SELECT q1 FROM int8_tbl;
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SELECT q2 FROM int8_tbl EXCEPT ALL SELECT q1 FROM int8_tbl;
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SELECT q2 FROM int8_tbl EXCEPT ALL SELECT DISTINCT q1 FROM int8_tbl;
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2000-11-09 03:47:49 +01:00
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SELECT q1 FROM int8_tbl EXCEPT SELECT q2 FROM int8_tbl;
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SELECT q1 FROM int8_tbl EXCEPT ALL SELECT q2 FROM int8_tbl;
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SELECT q1 FROM int8_tbl EXCEPT ALL SELECT DISTINCT q2 FROM int8_tbl;
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2000-10-05 21:11:39 +02:00
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--
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-- Mixed types
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--
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SELECT f1 FROM float8_tbl INTERSECT SELECT f1 FROM int4_tbl;
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SELECT f1 FROM float8_tbl EXCEPT SELECT f1 FROM int4_tbl;
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2000-11-09 03:47:49 +01:00
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--
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-- Operator precedence and (((((extra))))) parentheses
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--
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SELECT q1 FROM int8_tbl INTERSECT SELECT q2 FROM int8_tbl UNION ALL SELECT q2 FROM int8_tbl;
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SELECT q1 FROM int8_tbl INTERSECT (((SELECT q2 FROM int8_tbl UNION ALL SELECT q2 FROM int8_tbl)));
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(((SELECT q1 FROM int8_tbl INTERSECT SELECT q2 FROM int8_tbl))) UNION ALL SELECT q2 FROM int8_tbl;
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SELECT q1 FROM int8_tbl UNION ALL SELECT q2 FROM int8_tbl EXCEPT SELECT q1 FROM int8_tbl;
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SELECT q1 FROM int8_tbl UNION ALL (((SELECT q2 FROM int8_tbl EXCEPT SELECT q1 FROM int8_tbl)));
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(((SELECT q1 FROM int8_tbl UNION ALL SELECT q2 FROM int8_tbl))) EXCEPT SELECT q1 FROM int8_tbl;
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--
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-- Subqueries with ORDER BY & LIMIT clauses
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--
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-- In this syntax, ORDER BY/LIMIT apply to the result of the EXCEPT
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SELECT q1,q2 FROM int8_tbl EXCEPT SELECT q2,q1 FROM int8_tbl
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ORDER BY q2,q1;
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-- This should fail, because q2 isn't a name of an EXCEPT output column
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SELECT q1 FROM int8_tbl EXCEPT SELECT q2 FROM int8_tbl ORDER BY q2 LIMIT 1;
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-- But this should work:
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SELECT q1 FROM int8_tbl EXCEPT (((SELECT q2 FROM int8_tbl ORDER BY q2 LIMIT 1)));
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--
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-- New syntaxes (7.1) permit new tests
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--
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(((((select * from int8_tbl)))));
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