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43 lines
440 B
MySQL
43 lines
440 B
MySQL
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SELECT id
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FROM
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(
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SELECT 1 AS id
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UNION ALL
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SELECT NULL
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UNION ALL
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SELECT NULL
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)
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ALL FULL OUTER JOIN
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(
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SELECT 1 AS id
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UNION ALL
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SELECT NULL
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UNION ALL
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SELECT NULL
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) USING (id)
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ORDER BY id;
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SELECT '---';
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SELECT *
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FROM
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(
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SELECT NULL AS x
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)
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INNER JOIN
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(
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SELECT NULL AS x
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) USING (x);
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SELECT '---';
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SELECT *
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FROM
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(
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SELECT NULL AS x
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)
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FULL OUTER JOIN
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(
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SELECT NULL AS x
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) USING (x);
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