以下是我创建的新数据类型.
CREATE TYPE [dbo].[UpdateHotelTableType] AS TABLE(
[ID] [int] NULL,[HotelID] [int] NULL,[FromDate] [datetime] NULL,)
以下是我使用上述数据类型的存储过程.
ALTER PROCEDURE [dbo].[SP_Hotel_Info_Update]
-- Add the parameters for the stored procedure here
@XHotelInfoDetails UpdateHotelTableType READONLY,AS
BEGIN
Update dbo.HotelInfo
SET
FromDate = r.FromDate,from @XHotelInfoDetails r
Where HotelInfo.ID = r.ID
END
这适用于数据库中的更新结果.但我想检查id是否存在,如果id不存在,请将行插入表中.否则更新当前记录.在这里,我发送更新数据列表.
任何人都可以通过检查ID的存在来帮助我重新创建存储过程以插入数据.
解决方法
使用
MERGE：
Performs insert,update,or delete operations on a target table based on the results of a join with a source table. For example,you can synchronize two tables by inserting,updating,or deleting rows in one table based on differences found in the other table.
ALTER PROCEDURE [dbo].[SP_Hotel_Info_Update]
-- Add the parameters for the stored procedure here
@XHotelInfoDetails UpdateHotelTableType READONLY,AS
BEGIN
MERGE dbo.HotelInfo AS trg
USING @XHotelInfoDetails AS src
ON src.ID = trg.ID
WHEN MATCHED THEN
UPDATE SET FromDate = src.FromDate
WHEN NOT MATCHED BY TARGET THEN
INSERT (col1,col2,...)
VALUES (src.col1,src.col2,...);
END
编辑：
In my datatable,there can be newly added rows as well as deleted rows. So how can I compare the id and delete rows from hotelinfo table?
你可以添加新条款：
WHEN NOT MATCHED BY SOURCE [ AND <clause_search_condition> ]
THEN DELETE;
具体条件从目标中删除数据.
