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33 lines
1.8 KiB
SQL
33 lines
1.8 KiB
SQL
SET optimize_duplicate_order_by_and_distinct = 1;
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EXPLAIN SYNTAX SELECT DISTINCT number FROM numbers(1);
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EXPLAIN SYNTAX SELECT DISTINCT number FROM (SELECT DISTINCT number FROM numbers(1));
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EXPLAIN SYNTAX SELECT DISTINCT number * 2 FROM (SELECT DISTINCT number * 2, number FROM numbers(1));
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EXPLAIN SYNTAX SELECT DISTINCT number FROM (SELECT DISTINCT number * 2 AS number FROM numbers(1));
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EXPLAIN SYNTAX SELECT DISTINCT b, a FROM (SELECT DISTINCT number % 2 AS a, number % 3 AS b FROM numbers(100));
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EXPLAIN SYNTAX SELECT DISTINCT a FROM (SELECT DISTINCT number % 2 AS a, number % 3 AS b FROM numbers(100));
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EXPLAIN SYNTAX SELECT DISTINCT a FROM (SELECT DISTINCT a FROM (SELECT DISTINCT number % 2 AS a, number % 3 AS b FROM numbers(100)));
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EXPLAIN SYNTAX SELECT DISTINCT a FROM (SELECT DISTINCT a, b FROM (SELECT DISTINCT number % 2 AS a, number % 3 AS b FROM numbers(100)));
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EXPLAIN SYNTAX SELECT DISTINCT a, b FROM (SELECT DISTINCT b, a FROM (SELECT DISTINCT number a, number b FROM numbers(1)));
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EXPLAIN SYNTAX SELECT DISTINCT a, b FROM (SELECT b, a, a + b FROM (SELECT DISTINCT number % 2 AS a, number % 3 AS b FROM numbers(100)));
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EXPLAIN SYNTAX SELECT DISTINCT a FROM (SELECT a FROM (SELECT DISTINCT number % 2 AS a, number % 3 AS b FROM numbers(100)));
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EXPLAIN SYNTAX SELECT DISTINCT number FROM (SELECT DISTINCT number FROM numbers(1)) t1 CROSS JOIN numbers(2) t2;
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EXPLAIN SYNTAX SELECT DISTINCT number FROM (SELECT DISTINCT number FROM numbers(1) t1 CROSS JOIN numbers(2) t2);
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EXPLAIN SYNTAX SELECT DISTINCT number FROM
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(
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(SELECT DISTINCT number FROM numbers(1))
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UNION ALL
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(SELECT DISTINCT number FROM numbers(2))
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);
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--
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SELECT DISTINCT number FROM
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(
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(SELECT DISTINCT number FROM numbers(1))
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UNION ALL
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(SELECT DISTINCT number FROM numbers(2))
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)
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ORDER BY number;
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