Question

我有这样的查询结果，选择类型，Jan，FEB From TableName：

    +-----------+------+------+
    | Type      | JAN  | FEB  |
    +-----------+------+------+
    | MATIC     |  137 |  128 |
    | MOPED     |   41 |   23 |
    | MOPED PRM |    8 |    9 |
    | SPORT     |   55 |   62 |
    +-----------+------+------+
    4 rows in set (1.23 sec)

我想将列jan和列feb加起来，就像这样

    +-----------+------+------+------+
    | Type      | JAN  | FEB  | TOT  |
    +-----------+------+------+------+
    | MATIC     |  137 |  128 | 165  |
    | MOPED     |   41 |   23 |  64  |
    | MOPED PRM |    8 |    9 |  17  |
    | SPORT     |   55 |   62 | 117  | 
    +-----------+------+------+------+
    4 rows in set (1.23 sec)

是否有诸如

之类的命令

select type, jan, feb, sum (jan) + sum (feb) As TOT
From Table Name

这是我的语法

Select SubTbl2.jenis,
sum(If(Month = 1 and Year = 2013 ,Result,0)) as 'JAN',
sum(If(Month = 2 and Year = 2013,Result,0)) as 'FEB'
From (
select SubTbl1.jenis,month(SubTbl1.TglAmb) as Month,
year(SubTbl1.tglAmb) as Year,
count(SubTbl1.jenis) as Result
From (
select jual_leasing.TglAmb,jual_leasing.NoMsn,typemotor.jenis
,lokasi.lokasi3s
from jual_leasing
left join typeconvert
on jual_leasing.typeK = typeconvert.typesystem
left join typemotor
on typeconvert.typeconv = typemotor.type
left join lokasi
on jual_leasing.kodelok = lokasi.kodelokasi
where 
lokasi.lokasi3S = 'YMS PURWODADI 3S'
group by jual_leasing.NoMsn)
as SubTbl1
group by SubTbl1.jenis,Month,Year )
as SubTbl2 group by SubTbl2.jenis;

结果在Top上，我尝试在第4行添加脚本 JAN + FEB作为TOT

但是有警告： ERROR 1054（42S22）：'字段列表'中未知列'JAN'

Tq For advanced

Answer 1

要获得游览所需的输出，只需执行以下操作：

select type, jan, feb, jan + feb As TOT 
from TableName

您不需要SUM，它旨在添加不同行的值。

编辑对于您的实际查询，是的，您可以添加两个总和。此外，以下内容适合您：

sum(If((Month = 1 or Month = 2) and Year = 2013 ,Result,0)) as 'TOT',

Answer 2

arithmetic functions上的MySQL文档表明+确实是加法运算符。

因此，您的查询将是：

select type, jan, feb, jan + feb from table

Sum适用于列而非行;如果你想将两列的总和加在一起，你可以使用它。

P.S。 137 + 128 = 265

Answer 3

我认为你会发现这个问题正在下降，因为它不是真正的编程 - 这更像是一般的SQL语法问题。话虽如此，我认为你应该能够总结你的价值观：

select type, jan, feb, jan + feb As TOT From Table Name

Answer 4

只需使用以下命令更改查询的开头：

Select SubTbl2.jenis,
sum(If(Month = 1 and Year = 2013 ,Result,0)) as 'JAN',
sum(If(Month = 2 and Year = 2013,Result,0)) as 'FEB',
sum(If(Month = 1 and Year = 2013 ,Result,0)) +
sum(If(Month = 2 and Year = 2013,Result,0)) as 'TOT'
From (

或者

Select SubTbl2.jenis,
sum(If(Month = 1 and Year = 2013 ,Result,0)) as 'JAN',
sum(If(Month = 2 and Year = 2013,Result,0)) as 'FEB',
sum(If((Month = 1 or Month = 2) and Year = 2013,Result,0)) as 'TOT'
From (

总和列值

4 个答案: