Question

Hello All我想看一个如何在更新完成之前检查pappssn是否存在于数据库中的示例。如果是这样，提出错误记录exsist。我的前端是VB但是如果可能的话我想在我的存储过程中在SQL中处理它。任何想法？

ALTER Procedure [dbo].[usp_insertmemapp](
@pappfname nvarchar(50),
@pappmname nvarchar(50),
@papplname nvarchar(50),
@pappwedding nvarchar(50),
@pappstateresidence nvarchar(50),
@pappstreet nvarchar(50),
@pappcity nvarchar(50),
@pappstate char(2),
@pappzip char(6), 
@papphomephone nvarchar (13), 
@pappfax nvarchar (13), 
@pappaltstreet nvarchar(13), 
@pappaltcity nvarchar(25),
@pappaltstate char(2),
@pappaltzip char(6), 
@pappalthomephone nvarchar (13),
@pappaltfax nvarchar(13), 
@pappssn char(11), 
@pappdob nvarchar(50), 
@pappcell nvarchar(13), 
@pappemail nvarchar(50),   


BEGIN TRY
BEGIN TRANSACTION

INSERT INTO [a_abacus].[dbo].[primaryapplicant]
VALUES(
@pappfname,@pappmname,@papplname,@pappwedding,@pappstateresidence,@pappstreet,@pappcity,@pappstate,
@pappzip,@papphomephone,@pappfax,@pappaltstreet,@pappaltcity,@pappaltstate,
@pappaltzip,@pappalthomephone,@pappaltfax,@pappssn,@pappdob,@pappcell,@pappemail,


Commit Transaction
END TRY
BEGIN CATCH
ROLLBACK
END CATCH

Answer 1

ALTER Procedure [dbo].[usp_insertmemapp](
@pappfname nvarchar(50),
@pappmname nvarchar(50),
@papplname nvarchar(50),
@pappwedding nvarchar(50),
@pappstateresidence nvarchar(50),
@pappstreet nvarchar(50),
@pappcity nvarchar(50),
@pappstate char(2),
@pappzip char(6), 
@papphomephone nvarchar (13), 
@pappfax nvarchar (13), 
@pappaltstreet nvarchar(13), 
@pappaltcity nvarchar(25),
@pappaltstate char(2),
@pappaltzip char(6), 
@pappalthomephone nvarchar (13),
@pappaltfax nvarchar(13), 
@pappssn char(11), 
@pappdob nvarchar(50), 
@pappcell nvarchar(13), 
@pappemail nvarchar(50),   


BEGIN TRY
BEGIN TRANSACTION

-- this is the important change...
IF NOT EXISTS (SELECT pappssn FROM a_abacus WHERE pappssn = @pappssn)

    INSERT INTO [a_abacus].[dbo].[primaryapplicant]
    VALUES(
    @pappfname,@pappmname,@papplname,@pappwedding,@pappstateresidence,@pappstreet,@pappcity,@pappstate,
    @pappzip,@papphomephone,@pappfax,@pappaltstreet,@pappaltcity,@pappaltstate,
    @pappaltzip,@pappalthomephone,@pappaltfax,@pappssn,@pappdob,@pappcell,@pappemail,

Commit Transaction
END TRY
BEGIN CATCH
ROLLBACK
END CATCH

SQL检查更新前是否存在

1 个答案: