Question

我有这个商店程序，我假设用户想要更新一些字段而不是全部，我应该在更新部分添加什么

CREATE PROCEDURE [dbo].[helpChainAllCRUD] 
    @action char(1),
    @lineId char(2),
    @lineShift smallint = NULL, 
    @sequence smallint = NULL,
    @Role VARCHAR(32) = NULL,
    @radioChannel VARCHAR(16)= NULL,
    @officePhone VARCHAR(16)= NULL,
    @cellPhone VARCHAR(16)= NULL
as

IF(@action = 'I')
    BEGIN TRY
        BEGIN TRAN
            INSERT INTO [dbo].[tbl_helpChain] (lineId,lineShift,sequence,Role,radioChannel,officePhone,cellPhone)
            VALUES (@lineId ,@lineShift,@sequence,@Role,@radioChannel,@officePhone,@cellPhone)
        COMMIT
    END TRY
    BEGIN CATCH
        IF @@TRANCOUNT >0
            ROLLBACK
    END CATCH

IF(@action = 'U')
    BEGIN TRY
        BEGIN TRAN
            UPDATE [dbo].[tbl_helpChain] SET lineShift=@lineShift,sequence=@sequence,Role=@Role,radioChannel=@radioChannel,officePhone=@officePhone,cellPhone=@cellPhone WHERE lineId=@lineId
            COMMIT
        END TRY
    BEGIN CATCH
        IF @@TRANCOUNT >0
            ROLLBACK
    END CATCH

IF(@action = 'D')
    BEGIN TRY
        BEGIN TRAN
        Delete from [dbo].[tbl_helpChain] WHERE lineId=@lineId
        COMMIT
    END TRY
    BEGIN CATCH
        IF @@TRANCOUNT >0
            ROLLBACK
    END CATCH

IF(@action = 'S')
    Begin
        select lineId,lineShift,sequence,Role,radioChannel,officePhone,cellPhone from [dbo].[tbl_helpChain]  
    end

GO

Answer 1

如果ie null表示不更新，则只需编写

即可

SET lineShift = COALESCE(@lineShift,lineShift), ...

或者您采用另一个特殊值和案例表达

SET lineShift = CASE WHEN @lineShift = -1 then lineShift else @lineShift end,

或者为每个列提供额外的布尔参数，以便在case-expression

中使用

Answer 2

我确信有更好的解决方案，但快速简便的解决方案可能是使用非常丑陋的动态SQL

DECLARE @QueryText nvarchar(max) = 'UPDATE [dbo].[tbl_helpChain] SET '

IF @radioChannel<> NULL
@QueryText = @QueryText + 'RadioChannel=@radioChannel'

EXECUTE SP_EXECUTESQL @QueryText

Answer 3

更新helpChain

SET

fullName = ISNULL（@ fullName，fullName），

lineShift = ISNULL（@ lineShift，lineShift），

sequence = ISNULL（@ sequence，sequence），

Role = ISNULL（@ Role，Role），

radioChannel = ISNULL（@ radioChannel，radioChannel），

officePhone = ISNULL（@ officePhone，officePhone），

cellPhone = ISNULL（@ cellPhone，cellPhone） WHERE lineId = @lineId

如何允许用户仅更新某些字段

3 个答案: