Question

我有一张像

这样的出勤表

user_name     |   Col  |   col2   |   Col3  |  Col4 + other columns.

person1       |  a     |  3       | 76      | 56  etc.    ---------> sum of row

person2       |  6     |  72      | a       | 13  etc.    ---------> sum of row

其中'a'表示不存在，所以我需要在一行中添加所有列并显示在最后一列中，即'total'中，以便'a'应该被忽略，并且一行中剩余列的总和应添加并显示在最后一列的行

中

Answer 1

我建议您使用NULL而不是'a'，但如果您使用MySql，则可以使用以下内容：

SELECT
  user_name, Col, col2, Col3, Col4, Col1+Col2+Col3+Col4
FROM
  yourtable
WHERE 'a' IN (Col, Col2, Col3, Col4)

请参阅小提琴here。

Answer 2

在 mysql

中试试

     SELECT
      user_name, Col, col2, Col3, Col4, Col+Col2+Col3+Col4 as sum
     FROM
      yourtable

在 sql server

中

 SELECT
 user_name, Col, col2, Col3, Col4 ,
 case when col = 'a'
            then cast(col2 as int ) + cast(col3 as int ) +cast(col4 as int )
 when col2 = 'a'
            then cast(col as int ) + cast(col3 as int ) +cast(col4 as int )
 when col3 = 'a'
            then cast(col as int ) + cast(col2 as int ) +cast(col4 as int )
 when col4 = 'a'
            then cast(col as int ) + cast(col2 as int ) +cast(col3 as int )
else  cast(col as int )+ cast(col2 as int ) + cast(col3 as int ) +cast(col4 as int)     
 end    as sum_all

 FROM
  yourtable

 group by user_name , col , col2, col3,col4

DEMO HERE

Answer 3

在MSSQL中，这有效：

SELECT
  user_name, Col, col2, Col3, Col4, 
  CAST(REPLACE(Col, 'a', '0') AS INT)+
  CAST(REPLACE(Col2, 'a', '0') AS INT)+
  CAST(REPLACE(Col3, 'a', '0') AS INT)+
  CAST(REPLACE(Col4, 'a', '0') AS INT)
FROM
  yourtable

请参阅小提琴here

您也可以使用CASE语句代替REPLACE。

如果行中有char值，如何对行进行求和

3 个答案: