If..begin..begin tran..Rollback

Question

我已经遵循了代码，但它给出了一个错误，请指导我如何嵌套if..begin..begin__tran__Rollback或提交

declare @acname as varchar(max),
    @gstcount as int

set @acname='Party1'

use TESTDB

set @gstcount = (select count(GSTIN) from M_STATEWISEGSTINACTAG where GSTIN<>'UNREGISTERED' AND ACCD=
(select accd from m_ledger where descr LIKE @acname))


if @gstcount = 1 
   begin 
    --multiple select statments 
    select .......
    --to display require info.
   end

 --Then Update Values
     begin tran;
       update M_tbl ........where....

    --Show result with updated value
       select * from M_tbl........where.........

    --Undo Changes
      ROLLBACK; 
else
 begin
      SELECT ........reuqir info

 end;

在这个脚本中，我得到了一个错误：“关键字error”附近的不正确语法。

Answer 1

试试这个：

DECLARE @acname AS VARCHAR(MAX), @gstcount AS INT;
SET @acname = 'Party1';
USE TESTDB;
SET @gstcount =
(
    SELECT COUNT(GSTIN)
    FROM M_STATEWISEGSTINACTAG
    WHERE GSTIN <> 'UNREGISTERED' AND ACCD =(SELECT accd FROM m_ledger WHERE descr LIKE @acname)
);
IF @gstcount = 1
    BEGIN
        BEGIN 
    --multiple select statments 

            SELECT .......
    --to display require info.
       END;

 --Then Update Values
        BEGIN TRAN;
          update M_tbl ........where....
    --Show result with updated value
          select * from M_tbl........where.........
    --Undo Changes
        ROLLBACK TRAN;
    END;
    ELSE
    BEGIN
        SELECT........reuqir info;
    END;