88 lines
1.5 KiB
MySQL
88 lines
1.5 KiB
MySQL
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--
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-- join.sql
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--
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-- Test join clauses
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--
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CREATE TABLE JOIN_TBL (
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i integer,
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j integer,
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x text
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);
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CREATE TABLE JOIN2_TBL (
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i integer,
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k integer
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);
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INSERT INTO JOIN_TBL VALUES (1, 3, 'one');
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INSERT INTO JOIN_TBL VALUES (2, 2, 'two');
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INSERT INTO JOIN_TBL VALUES (3, 1, 'three');
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INSERT INTO JOIN_TBL VALUES (4, 0, 'four');
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INSERT INTO JOIN2_TBL VALUES (1, -1);
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INSERT INTO JOIN2_TBL VALUES (2, 2);
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INSERT INTO JOIN2_TBL VALUES (3, -3);
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INSERT INTO JOIN2_TBL VALUES (2, 4);
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--
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-- Inner joins (equi-joins)
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--
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SELECT '' AS "xxx", *
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FROM JOIN_TBL CROSS JOIN JOIN2_TBL;
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SELECT '' AS "xxx", *
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FROM JOIN_TBL NATURAL JOIN JOIN2_TBL;
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SELECT '' AS "xxx", *
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FROM JOIN_TBL INNER JOIN JOIN2_TBL USING (i);
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SELECT '' AS "xxx", *
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FROM JOIN_TBL JOIN JOIN2_TBL ON (JOIN_TBL.i = JOIN2_TBL.i);
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SELECT '' AS "xxx", *
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FROM JOIN_TBL JOIN JOIN2_TBL ON (JOIN_TBL.i = JOIN2_TBL.k);
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SELECT '' AS "xxx", *
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FROM JOIN_TBL CROSS JOIN JOIN2_TBL;
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--
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-- Non-equi-joins
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--
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SELECT '' AS "xxx", *
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FROM JOIN_TBL JOIN JOIN2_TBL ON (JOIN_TBL.i <= JOIN2_TBL.k);
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--
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-- Outer joins
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--
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SELECT '' AS "xxx", *
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FROM JOIN_TBL OUTER JOIN JOIN2_TBL USING (i);
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SELECT '' AS "xxx", *
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FROM JOIN_TBL LEFT OUTER JOIN JOIN2_TBL USING (i);
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SELECT '' AS "xxx", *
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FROM JOIN_TBL RIGHT OUTER JOIN JOIN2_TBL USING (i);
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SELECT '' AS "xxx", *
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FROM JOIN_TBL FULL OUTER JOIN JOIN2_TBL USING (i);
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--
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-- More complicated constructs
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--
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--
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-- Clean up
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--
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DROP TABLE JOIN_TBL;
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DROP TABLE JOIN2_TBL;
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