动态地运行一个存储过程。

I have created a stored procedure that calculates from some table and retrieve a new dataset back:

我创建了一个存储过程，从某些表中计算并检索新的数据集:

  " DECLARE @maxVal int " +
  " Set @maxVal = (SELECT ID FROM TableCustomers " +
  " WHERE Service_ID = @Service_ID) " +
  " execute SP_CaculateData @maxVal ";

Now the TableCustomers also have a column called CustomerName and each CustmerName can have multiple Service_ID's. How can I run my stored procedure multiple times, all depends on how many services each CustomerName has. Something like:

现在TableCustomers也有一个名为CustomerName的列，每个CustmerName都可以有多个Service_ID。如何多次运行存储过程，都取决于每个CustomerName拥有多少服务。喜欢的东西:

 execute SP_CaculateData @maxVal
 execute SP_CaculateData @maxVal
 execute SP_CaculateData @maxVal
 execute SP_CaculateData @maxVal

I have been reading something about cursors, but if anyone can give me a hand hear I would appreciate that.

我读过一些关于游标的东西，但是如果有人能帮我一个忙，请听我说，我会很感激的。

1 个解决方案

#1

One option is to use a while loop to iterate through the customers and service ids:

一种选择是使用while循环遍历客户和服务id:

declare
        @maxVal int
       ,@customerName varchar(200)
       ,@serviceID int

select @customerName = MIN(CustomerName)
from TableCustomers t

while(select COUNT(1)
      from TableCustomers t
      where t.CustomerName >= @customerName) > 0
    begin

        --here we are dealing w/ a specific customer
        --loop through the serviceIDs

        select @serviceID = MIN(Service_ID)
        from TableCustomers t
        where t.CustomerName = @customerName


        while(select COUNT(1)
              from TableCustomers t
              where t.CustomerName = @customerName
                and t.Service_ID >= @serviceID) > 0

            begin
                select @maxVal = MAX(Id)
                from TableCustomers t
                where t.Service_ID = @serviceID

                execute SP_CalculateData @maxVal

                select @serviceID = MIN(Service_ID)
                from TableCustomers t
                where t.CustomerName = @customerName
                  and t.Service_ID > @serviceID
            end


        select @customerName = MIN(CustomerName)
        from TableCustomers t
        where t.CustomerName > @customerName

    end

I can't say whether or not this is a solution that will perform better than a cursor, but it should get the job done.

我不能说这是否是一个比游标性能更好的解决方案，但它应该完成这项工作。

#1