Question

When I try to execute the query below, I get error

Incorrect syntax near the keyword ‘convert’

and I’m not sure where I made mistake. The data type for qty field is nchar so I used convert function for finding totals.

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

Here is the table

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

and so on…

Answer 1

Don’t use select * in your sub query. List all columns you need and do the type cast in the field list instead of in the sum() function.

The aggregate function in a pivot does not take an expression as an argument. You have to specify a column.

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

You are probably looking for something like this.

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

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