有一句需要大家给予解释一下

declare @sql varchar(8000)
set @sql = 'select xh '
select @sql = @sql + ' , sum(case kc when ' ' ' + kc + ' ' ' then cj else 0 end) [ ' + kc + '] '
from (select distinct kc from t) as a
set @sql = @sql + ' from t group by xh '
exec(@sql)


[解决办法]
declare @sql varchar(8000)
set @sql = 'select xh '
select @sql = @sql + ' , sum(case kc when ' ' ' + kc + ' ' ' then cj else 0 end) [ ' + kc + '] '
from (select distinct kc from t) as a
set @sql = @sql + ' from t group by xh '


print @sql --打印出来SQL语句

exec(@sql)


exec 是系统提供的可以执行一个串。
[解决办法]
先改成
declare @sql varchar(8000)
set @sql = 'select xh '
select @sql = @sql + ' , sum(case kc when ' ' ' + kc + ' ' ' then cj else 0 end) [ ' + kc + '] '
from (select distinct kc from t) as a
set @sql = @sql + ' from t group by xh '
print @sql

执行，
再改成
declare @sql varchar(8000)
set @sql = 'select xh '
select @sql = @sql + ' , sum(case kc when ' ' ' + kc + ' ' ' then cj else 0 end) [ ' + kc + '] '
from (select distinct kc from t) as a
print @sql
执行
我想你就基本明白了