Mega Code Archive
Nested subqueries
<![CDATA[
mysql>
mysql> SELECT NUMBER
-> FROM (SELECT CAST(CONCAT(DIGIT1.DIGIT,
-> CONCAT(DIGIT2.DIGIT,
-> DIGIT3.DIGIT)) AS UNSIGNED INTEGER)
-> AS NUMBER
-> FROM (SELECT '0' AS DIGIT UNION SELECT '1' UNION
-> SELECT '2' UNION SELECT '3' UNION
-> SELECT '4' UNION SELECT '5' UNION
-> SELECT '6' UNION SELECT '7' UNION
-> SELECT '8' UNION SELECT '9') AS DIGIT1,
-> (SELECT '0' AS DIGIT UNION SELECT '1' UNION
-> SELECT '2' UNION SELECT '3' UNION
-> SELECT '4' UNION SELECT '5' UNION
-> SELECT '6' UNION SELECT '7' UNION
-> SELECT '8' UNION SELECT '9') AS DIGIT2,
-> (SELECT '0' AS DIGIT UNION SELECT '1' UNION
-> SELECT '2' UNION SELECT '3' UNION
-> SELECT '4' UNION SELECT '5' UNION
-> SELECT '6' UNION SELECT '7' UNION
-> SELECT '8' UNION SELECT '9') AS DIGIT3)
-> AS NUMBERS
-> ORDER BY NUMBER;
+--------+
| NUMBER |
+--------+
| 0 |
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
| 9 |
| 10 |
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| 998 |
| 999 |
+--------+
1000 rows in set (0.00 sec)
mysql>
]]>