Question

具有以下查询

SELECT 
Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date',
device_serial as "Device Serial",
customer_name as "Customer",
error_code as 'Error Code',
resolutiom as 'Resolution'
FROM preventive_maintenance
ORDER BY `timestamp` desc
LIMIT 25

我想按“到期日”订购，该怎么办？

Answer 1

只需将当前查询作为子查询即可。

SELECT 
    T.*
FROM
    (SELECT 
        Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as `Due Date`,
        device_serial as `Device Serial`,
        customer_name as `Customer`,
        error_code as `Error Code`,
        resolutiom as `Resolution`
    FROM preventive_maintenance
        -- ORDER BY `timestamp` desc
    LIMIT 25) AS T
ORDER BY T.`Due Date`

Answer 2

Order By `Due Date`

需要工作。你试过了吗？如果没有，则可以使用子查询。

SELECT * FROM 
(
    SELECT 
      Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date',
      device_serial as "Device Serial",
      customer_name as "Customer",
      error_code as 'Error Code',
      resolutiom as 'Resolution'
    FROM preventive_maintenance
) T
ORDER BY `Due Date`
LIMIT 25

示范

SELECT * from (
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
union all 
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
union all 
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
union all 
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
union all 
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
union all 
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
union all 
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
union all 
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
union all 
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
union all 
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
union all 
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
union all 
SELECT  Now() + INTERVAL FLOOR(RAND()*(1000-5+1)+5) DAY as 'Due Date' from dual
) T
order by `Due Date`
LIMIT 5

| Due Date            |
| :------------------ |
| 2019-10-27 13:16:15 |
| 2019-11-26 13:16:15 |
| 2020-05-05 13:16:15 |
| 2020-07-01 13:16:15 |
| 2020-07-01 13:16:15 |

db <>提琴here

在查询期间设置变量

2 个答案: