获得无限循环。游标仅获取一条记录以进行测试，但不能离开获取循环。这是我第一次使用Microsoft sql。我不确定fetch语句的语法和位置。 我正在尝试更新发票详细信息，即一张发票有多个项目。请帮忙。
Begin--1
Declare @Det_inv_cnt int, ---------count invoice in detail
@Cnt_item5 int, --------count item number 5
@Cnt_item6 int, --------count item number 6
@sprice money, --------sum vatable amt
@vat_amt money, --------vat amt
@inv int, --------invoice
@customer int, --------customer id
@sdate datetime, --------date
@edate datetime --------date
begin--2
Declare inv_id Cursor For (Select invoice from plat.dbo.iheader
Where customer in (Select id from plat.dbo.customer
Where custype = 1
and id = 2601)
and invoice = 2628
OPEN inv_id
FETCH NEXT FROM inv_id INTO @inv -----------------------------next invoice from cursor
WHILE @@FETCH_STATUS=0
BEGIN--------begin4
set @sprice = 0;
set @vat_amt = 0;
set @det_inv_cnt = 0;
set @cnt_item5 = 0;
set @cnt_item6 = 0;
set @customer = (select customer from plat.dbo.iheader where @inv = invoice);
set @Det_inv_cnt = (select count(1)
from plat.dbo.idetail d
where d.item in ('2','4')
and d.invoice = @inv)
If (@Det_inv_cnt>0) ---------------------------------------end if 10
Begin -----begin5 end if 10
--calculate vatable amt and vat round(0.15*sum(a.price),2)
set @sprice = (Select sum(price)
From plat.dbo.idetail
Where invoice = @inv
And item in ('2','4'));
set @vat_amt = (Select (0.15*(sum(price)))
From plat.dbo.idetail
Where invoice = @inv
And item in ('2','4'));
set @cnt_item5 = (Select count(1)
From plat.dbo.idetail
where item = '5'
and invoice = @inv
and customer = @customer);
set @sdate = (select sdate
From idetail
Where item ='2'
or item = '4'
And invoice = @inv);
set @edate = (select edate
From idetail
Where item ='2'
or item = '4'
And invoice = @inv);
--select details to insert new record
INSERT INTO idetail
( invoice
, item
, descriptio
, qty
, price
, date
, customer
, sdate
, edate
--,timestamp
,profileid
, id_item_code
, id_taxable_amt
, id_item_instock
, id_extended
, id_category_id
, id_subcategory_id
, id_rg_id
, id_svc_id
, id_sbd_id
, id_rate_id
, id_prorated )
values ( @inv --invoice
,'TAX#1003' --item
,'#VAT (Rs. '+ @sprice +' x 15%)' --descriptio
,1 --qty
,@vat_amt --price
,@sdate --date
,@customer --customer
,@sdate --sdate
,@edate --edate
--,CURRENT_TIMESTAMP
,-1 --profileid
,0 --itemcode
,@SPRICE --taxable amt
,null --id_item_instock, int,
,@VAT_AMT --id_extended, money,
,1002 --id_category_id, int,
,0 --id_subcategory_id, int,
,0 --id_rg_id, int,
,0 --id_svc_id, int,
,0 --id_sbd_id, int,
,0 --id_rate_id, int,
,null); --id_prorated, char(1)
/*From dbo.plat.idetail
Where item ='2'
or item = '4'
And invoice = @inv;
*/
Begin --11
If @Cnt_item5 > 0 ------------------------------------------------------if cnt_item 5 >0
Begin------6
--delete old VAT record
Delete from idetail
where invoice = @inv
and item = '5'
and customer = @customer;
--update roundoff item number 6
set @cnt_item6 = (Select count(1)
from plat.dbo.idetail w
where w.invoice = @inv
and w.customer = @customer
and w.item = '6')
If @Cnt_item6>0 -------------------------------------------if cnt_item6>0
Begin---7
update plat.dbo.idetail
set item = '5'
where invoice = @inv
and customer = @customer
and item = '6';
End;--7
Else -------------------------------------------------------------else cnt_item6
Begin--8
Insert into err_log(
El_customer,
El_Invoice,
El_msg,
El_date)
Values (
@customer,
@inv,
('Residential Script - Count of Item 6 returned 0'),
getdate());
End;--8
End; --end 6 of begin cnt5>0
End;--11
-- End;---5
---update header with vat_amt
Begin--9
Update plat.dbo.iheader
Set taxtotal = @vat_amt
where invoice = @inv
and customer = @customer;
end;--9
end;--5
Else ----------else 10 dev_inv_cnt
/* no item found the insert in table*/
begin--10
Insert into err_log(
El_customer,
El_Invoice,
El_msg,
El_date)
Values (
@customer
,@inv
,('Residential - Count of Item 2 and 4 returned 0')
,Getdate());
end;--10
--End; --------end begin 4 while
FETCH NEXT FROM inv_id INTO @inv --get nxt record for cursor invt id
End; ----begin 4
CLOSE inv_id;
DEALLOCATE inv_id;
--GO
end;---begin 2
End;--1
答案 0 :(得分：0)
FETCH NEXT FROM Inv_IdINTO @invnext指令位于前IF语句的ELSE分支内。它必须放在ELSE分支之后
答案 1 :(得分：0)
您只需从游标中获取一次，而while循环将检查该获取的状态。由于它大概成功了，所以该条件总是被评估为真。
对于它的价值，这是我用于游标的模板：
declare cursorName cursor fast_forward local for
-- your select goes here
OPEN cursorName
WHILE (1=1)
BEGIN
FETCH NEXT FROM cursorName INTO --variable list here
if (@@FETCH_STATUS <> 0)
BREAK;
-- do stuff here
END
CLOSE cursorName
DEALLOCATE cursorName