使用给定日期从数据库中获取唯一的userID

Question

|--------------------------------------
|  luid |  alti   | lati  |   sdate   | 
|--------------------------------------
|  14  |  11.222  | 11.22 |18-10-2016 |
|  14  |  22.333  | 11.22 |18-10-2016 |
|  12  |  32.111  | 11.22 |18-10-2016 |
|  12  |  11.234  | 11.22 |18-10-2016 |
|  13  |  24.555  | 11.22 |18-10-2016 |
|  16  |  16.000  | 11.22 |19-10-2016 |
---------------------------------------

我想从 18-20-2016 表格中获取唯一的 luid 总列也。

我该怎么做？

Answer 1

尝试，

SELECT DISTINCT(Column_Name) AS Column_Name FROM Table_Name ORDER BY Column_Name DESC;

Answer 2

尝试这个 从luid选择table WHERE sdate =“所需日期”分组luid