我正在使用查询按描述顺序从表中获取一些记录-
SELECT trn_id,cus_name,mobile,product,product_slno,entry_by FROM
insur_trn WHERE trn_id !='' ORDER BY trn_id DESC;
我希望trn_id像：
trn_id
128
127
126
125
但是在应用DESC命令时，它像这样：
+--------+
| trn_id |
+--------+
| 93 |
| 92 |
| 91 |
| 90 |
| 9 |
| 89 |
| 88 |
| 87 |
| 86 |
| 85 |
| 84 |
| 83 |
| 82 |
| 81 |
| 80 |
| 8 |
| 79 |
| 78 |
| 77 |
| 76 |
| 75 |
| 74 |
| 73 |
| 72 |
| 71 |
| 70 |
| 7 |
| 69 |
| 68 |
| 65 |
| 64 |
| 63 |
| 62 |
| 61 |
| 60 |
| 6 |
| 59 |
| 58 |
| 5 |
| 4 |
| 39 |
| 38 |
| 37 |
| 35 |
| 34 |
| 33 |
| 32 |
| 31 |
| 30 |
| 3 |
| 29 |
| 28 |
| 27 |
| 26 |
| 25 |
| 24 |
| 23 |
| 22 |
| 20 |
| 2 |
| 19 |
| 18 |
| 17 |
| 16 |
| 15 |
| 14 |
| 13 |
| 128 |
| 127 |
| 126 |
| 125 |
| 124 |
| 123 |
| 122 |
| 121 |
| 120 |
| 12 |
| 119 |
| 118 |
| 117 |
| 116 |
| 115 |
| 114 |
| 113 |
| 112 |
| 111 |
| 110 |
| 11 |
| 109 |
| 108 |
| 107 |
| 106 |
| 105 |
| 10 |
+--------
如何按降序获取trn_id，此查询仅按第一位数字对trn_id进行排序，但我希望按 128,127、126 排列...... 它不是那样来
看起来您的trn_id是一个字符串，因此排序是按字母顺序完成的。
如果你想要它的数字，你应该把它转换为一个数字：
SELECT trn_id,cus_name,mobile,product,product_slno,entry_by
FROM insur_trn WHERE trn_id !=''
ORDER BY CAST(trn_id as SIGNED INTEGER) DESC;