Nested subqueries : Sub query « Select Clause « SQL / MySQL






  1. SQL / MySQL
  2. Select Clause
  3. Sub query

Nested subqueries

       
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 |
|     11 |
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|     42 |
|     43 |
|     44 |
|     45 |
|     46 |
|     47 |
|     48 |
|     49 |
|     50 |
|     51 |
|     52 |
|     53 |
|     54 |
|     55 |
|     56 |
|     57 |
|     58 |
|     59 |
|     60 |
|     61 |
|     62 |
|     63 |
|     64 |
|     65 |
|     66 |
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|     70 |
|     71 |
|     72 |
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|     74 |
|     75 |
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|     90 |
|     91 |
|     92 |
|     93 |
|     94 |
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|     99 |
|    100 |
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|    103 |
|    104 |
|    105 |
|    106 |
|    107 |
|    108 |
|    109 |
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|    111 |
|    112 |
|    113 |
|    114 |
|    115 |
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|    285 |
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|    291 |
|    292 |
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|    294 |
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|    297 |
|    298 |
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|    302 |
|    303 |
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|    305 |
|    306 |
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|    308 |
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|    312 |
|    313 |
|    314 |
|    315 |
|    316 |
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|    318 |
|    319 |
|    320 |
|    321 |
|    322 |
|    323 |
|    324 |
|    325 |
|    326 |
|    327 |
|    328 |
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|    331 |
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|    428 |
|    429 |
|    430 |
|    431 |
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|    433 |
|    434 |
|    435 |
|    436 |
|    437 |
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|    460 |
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|    468 |
|    469 |
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|    471 |
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|    473 |
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|    476 |
|    477 |
|    478 |
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|    509 |
|    510 |
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|    520 |
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|    530 |
|    531 |
|    532 |
|    533 |
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|    535 |
|    536 |
|    537 |
|    538 |
|    539 |
|    540 |
|    541 |
|    542 |
|    543 |
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|    550 |
|    551 |
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|    555 |
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|    559 |
|    560 |
|    561 |
|    562 |
|    563 |
|    564 |
|    565 |
|    566 |
|    567 |
|    568 |
|    569 |
|    570 |
|    571 |
|    572 |
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|    577 |
|    578 |
|    579 |
|    580 |
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|    583 |
|    584 |
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|    589 |
|    590 |
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|    593 |
|    594 |
|    595 |
|    596 |
|    597 |
|    598 |
|    599 |
|    600 |
|    601 |
|    602 |
|    603 |
|    604 |
|    605 |
|    606 |
|    607 |
|    608 |
|    609 |
|    610 |
|    611 |
|    612 |
|    613 |
|    614 |
|    615 |
|    616 |
|    617 |
|    618 |
|    619 |
|    620 |
|    621 |
|    622 |
|    623 |
|    624 |
|    625 |
|    626 |
|    627 |
|    628 |
|    629 |
|    630 |
|    631 |
|    632 |
|    633 |
|    634 |
|    635 |
|    636 |
|    637 |
|    638 |
|    639 |
|    640 |
|    641 |
|    642 |
|    643 |
|    644 |
|    645 |
|    646 |
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|    648 |
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|    650 |
|    651 |
|    652 |
|    653 |
|    654 |
|    655 |
|    656 |
|    657 |
|    658 |
|    659 |
|    660 |
|    661 |
|    662 |
|    663 |
|    664 |
|    665 |
|    666 |
|    667 |
|    668 |
|    669 |
|    670 |
|    671 |
|    672 |
|    673 |
|    674 |
|    675 |
|    676 |
|    677 |
|    678 |
|    679 |
|    680 |
|    681 |
|    682 |
|    683 |
|    684 |
|    685 |
|    686 |
|    687 |
|    688 |
|    689 |
|    690 |
|    691 |
|    692 |
|    693 |
|    694 |
|    695 |
|    696 |
|    697 |
|    698 |
|    699 |
|    700 |
|    701 |
|    702 |
|    703 |
|    704 |
|    705 |
|    706 |
|    707 |
|    708 |
|    709 |
|    710 |
|    711 |
|    712 |
|    713 |
|    714 |
|    715 |
|    716 |
|    717 |
|    718 |
|    719 |
|    720 |
|    721 |
|    722 |
|    723 |
|    724 |
|    725 |
|    726 |
|    727 |
|    728 |
|    729 |
|    730 |
|    731 |
|    732 |
|    733 |
|    734 |
|    735 |
|    736 |
|    737 |
|    738 |
|    739 |
|    740 |
|    741 |
|    742 |
|    743 |
|    744 |
|    745 |
|    746 |
|    747 |
|    748 |
|    749 |
|    750 |
|    751 |
|    752 |
|    753 |
|    754 |
|    755 |
|    756 |
|    757 |
|    758 |
|    759 |
|    760 |
|    761 |
|    762 |
|    763 |
|    764 |
|    765 |
|    766 |
|    767 |
|    768 |
|    769 |
|    770 |
|    771 |
|    772 |
|    773 |
|    774 |
|    775 |
|    776 |
|    777 |
|    778 |
|    779 |
|    780 |
|    781 |
|    782 |
|    783 |
|    784 |
|    785 |
|    786 |
|    787 |
|    788 |
|    789 |
|    790 |
|    791 |
|    792 |
|    793 |
|    794 |
|    795 |
|    796 |
|    797 |
|    798 |
|    799 |
|    800 |
|    801 |
|    802 |
|    803 |
|    804 |
|    805 |
|    806 |
|    807 |
|    808 |
|    809 |
|    810 |
|    811 |
|    812 |
|    813 |
|    814 |
|    815 |
|    816 |
|    817 |
|    818 |
|    819 |
|    820 |
|    821 |
|    822 |
|    823 |
|    824 |
|    825 |
|    826 |
|    827 |
|    828 |
|    829 |
|    830 |
|    831 |
|    832 |
|    833 |
|    834 |
|    835 |
|    836 |
|    837 |
|    838 |
|    839 |
|    840 |
|    841 |
|    842 |
|    843 |
|    844 |
|    845 |
|    846 |
|    847 |
|    848 |
|    849 |
|    850 |
|    851 |
|    852 |
|    853 |
|    854 |
|    855 |
|    856 |
|    857 |
|    858 |
|    859 |
|    860 |
|    861 |
|    862 |
|    863 |
|    864 |
|    865 |
|    866 |
|    867 |
|    868 |
|    869 |
|    870 |
|    871 |
|    872 |
|    873 |
|    874 |
|    875 |
|    876 |
|    877 |
|    878 |
|    879 |
|    880 |
|    881 |
|    882 |
|    883 |
|    884 |
|    885 |
|    886 |
|    887 |
|    888 |
|    889 |
|    890 |
|    891 |
|    892 |
|    893 |
|    894 |
|    895 |
|    896 |
|    897 |
|    898 |
|    899 |
|    900 |
|    901 |
|    902 |
|    903 |
|    904 |
|    905 |
|    906 |
|    907 |
|    908 |
|    909 |
|    910 |
|    911 |
|    912 |
|    913 |
|    914 |
|    915 |
|    916 |
|    917 |
|    918 |
|    919 |
|    920 |
|    921 |
|    922 |
|    923 |
|    924 |
|    925 |
|    926 |
|    927 |
|    928 |
|    929 |
|    930 |
|    931 |
|    932 |
|    933 |
|    934 |
|    935 |
|    936 |
|    937 |
|    938 |
|    939 |
|    940 |
|    941 |
|    942 |
|    943 |
|    944 |
|    945 |
|    946 |
|    947 |
|    948 |
|    949 |
|    950 |
|    951 |
|    952 |
|    953 |
|    954 |
|    955 |
|    956 |
|    957 |
|    958 |
|    959 |
|    960 |
|    961 |
|    962 |
|    963 |
|    964 |
|    965 |
|    966 |
|    967 |
|    968 |
|    969 |
|    970 |
|    971 |
|    972 |
|    973 |
|    974 |
|    975 |
|    976 |
|    977 |
|    978 |
|    979 |
|    980 |
|    981 |
|    982 |
|    983 |
|    984 |
|    985 |
|    986 |
|    987 |
|    988 |
|    989 |
|    990 |
|    991 |
|    992 |
|    993 |
|    994 |
|    995 |
|    996 |
|    997 |
|    998 |
|    999 |
+--------+
1000 rows in set (0.00 sec)

mysql>








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