Question

当我尝试执行下面的查询时，我收到错误

关键字'convert'
附近的语法不正确

而且我不确定我犯了什么错误。 qty字段的数据类型是nchar，所以我使用convert函数来查找总数。

select column_date, [red] as red, [blue] as blue, [green] as green, [yellow] as yellow 
from
(select * from table1) as t1
pivot
(
sum(convert(int,qty)) 
For color in 
([red], [blue], [green], [yellow])
) as SumofQuantityforeachcolor

这是表格

column_date | color | qty | supplier
1 June 2012 | red   | 2   | XY
1 June 2012 | red   | 1   | AB
1 June 2012 | blue  | 4   | CD
1 June 2012 | blue  | 1   | XY
2 June 2012 | yellow| 13  | CD
2 June 2012 | green | 45  | CD
2 June 2012 | blue  | 32  | AB
2 June 2012 | red   | 37  | XY
2 June 2012 | red   | 2   | XY
2 June 2012 | red   | 1   | AB
2 June 2012 | blue  | 4   | CD
3 June 2012 | red   | 1   | AB
3 June 2012 | blue  | 4   | CD
3 June 2012 | blue  | 1   | XY
3 June 2012 | yellow| 13  | CD
3 June 2012 | green | 45  | CD
3 June 2012 | blue  | 32  | AB

依旧......

Answer 1

请勿在子查询中使用select *。列出所需的所有列，并在字段列表中而不是sum()函数中执行类型转换。

数据透视表中的聚合函数不会将表达式作为参数。您必须指定一列。

<pivot_clause> ::=
        ( aggregate_function ( value_column [ [ , ]...n ]) 
        FOR pivot_column 
        IN ( <column_list> ) 
    )

你可能正在寻找类似的东西。

select column_date, [red] as red, [blue] as blue, [green] as green, [yellow] as yellow 
from (
     select column_date,
            color,
            cast(qty as int) as qty
     from table1
     ) as T
pivot
     (
     sum(qty) 
     for color in ([red], [blue], [green], [yellow])
     ) as SumofQuantityforeachcolor

SE-Data

Answer 2

您是否尝试使用cast(gty as int)？

尝试在PIVOT中使用CONVERT时出现语法错误

2 个答案: