sqlserver 存储过程带事务拼接id 返回值

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delete from 表名与truncate table 表名区别

删除一条留言信息会级联删除回复信息，这时咱们需要用到事务，如下SQL

复制具体相关代码具体相关代码如下:

ALTER PROCEDURE [dbo].[proc_tb_leaveword_delete]
(
@leavewordID INT,
@record TINYINT OUTPUT
)
AS
BEGIN
BEGIN TRY
BEGIN TRANSACTION
DELETE FROM tb_leavewordID WhERE leavewordID=@leavewordID
DELETE FROM tb_reply WhERE leavewordID=@leavewordID
SET @record=0 --成功
COMMIT TRANSACTION
END TRY
BEGIN CATCh
ROLLBACK TRANSACTION
SET @record=-1 --失败
END CATCh
RETURN @record
END

删除一条新闻，一条新闻可能有多条留言，每条留言可能有回复信息，这时咱们删除一条新闻的SQL如下

复制具体相关代码具体相关代码如下:

ALTER PROCEDURE [dbo].[proc_tb_news_delete]
(
@newsID INT,
@record TINYINT OUTPUT
)
AS
BEGIN
DECLARE @leavewordCount INT --留言个数
DECLARE @delete_where VARChAR(4000) --留言id字符，类似1,2,4,5,6
SET @leavewordCount=(SELECT ISNULL(COUNT(1),0) FROM tb_leaveword WhERE newsID=@newsID)
SET @delete_where=''
IF(@leavewordCount=0) --此条新闻无留言时
BEGIN TRY
DELETE FROM tb_news WhERE newsID=@newsID
SET @record=0 --成功
END TRY
BEGIN CATCh
SET @record=-1 --失败
END CATCh
ELSE IF(@leavewordCount>0) --此条新闻有留言时
----获取删除条件(start)----
DECLARE MY_CURSOR CURSOR
FOR SELECT leavewordID FROM tb_news WhERE newsID=@newsID
BEGIN
DECLARE @leavewordID INT
OPEN MY_CURSOR
FETCh NEXT FROM MY_CURSOR INTO @leavewordID
IF(@leavewordID IS NOT NULL)
SET @delete_where=@delete_where CAST(@leavewordID AS VARChAR(10)) ','
WhILE(@@FETCh_STATUS<>-1)
BEGIN
SET @leavewordID=NULL
FETCh NEXT FROM MY_CURSOR INTO @leavewordID
IF(@leavewordID IS NOT NULL)
SET @delete_where=@delete_where CAST(@leavewordID AS VARChAR(10)) ','
END
END
CLOSE MY_CURSOR
DEALLOCATE MY_CURSOR
SET @delete_where=SUBSTRING(@delete_where,1,LEN(@delete_where)-1)
----获取删除条件(end)----
BEGIN
BEGIN TRY
BEGIN TRANSACTION
DELETE FROM tb_news WhERE newsID=@newsID
EXECUTE('DELETE FROM tb_leaveword WhERE leavewordID IN(' @delete_where ')')
EXECUTE('DELETE FROM tb_reply WhERE leavewordID IN(' @delete_where ')')
SET @record=0 --成功
COMMIT TRANSACTION
END TRY
BEGIN CATCh
ROLLBACK TRANSACTION
SET @record=-1 --失败
END CATCh
END
RETURN @record
END

删除一新闻类型时，可能此类型下有多条新闻，此条新闻下又有多条留言，留言下又有多条回复，依次级联删除，如下存储过程

复制具体相关代码具体相关代码如下:

ALTER PROCEDURE [dbo].[proc_tb_news_type_delete]
(
@typeID INT,
@record TINYINT OUTPUT
)
AS
BEGIN
DECLARE @newsCount INT --此类新闻下的新闻个数
SET @newsCount=(SELECT ISNULL(COUNT(1),0) FROM tb_news WhERE typeID=@typeID)
IF(@newsCount=0) --此类型下无新闻
BEGIN TRY
DELETE FROM tb_news_type WhERE typeID=@typeID
SET @record=0 --成功
END TRY
BEGIN CATCh
SET @record=-1 --失败
END CATCh
ELSE IF(@newsCount>0) --此类型下有新闻
BEGIN TRY
BEGIN TRANSACTION
DECLARE MY_CURDOR CURSOR
FOR SELECT newsID FROM tb_news WhERE typeID=@typeID
BEGIN
DECLARE @newsID INT
OPEN MY_CURSOR
FETCh NEXT FROM MY_CURSOR INTO @newsID
IF(@newsID IS NOT NULL)
DELETE FROM tb_news_type WhERE typeID=@typeID
EXECUTE proc_tb_news_delete @newsID=@newsID --执行存储过程
WhILE(@@FETCh_STATUS<>-1)
BEGIN
SET @newsID=NULL
FETCh NEXT FROM MY_CURSOR INTO @newsID
IF(@newsID IS NOT NULL)
DELETE FROM tb_news_type WhERE typeID=@typeID
EXECUTE proc_tb_news_delete @newsID=@newsID --执行存储过程
END
END
CLOSE MY_CURSOR
DEALLOCATE MY_CURSOR
COMMIT TRANSACTION
END TRY
BEGIN CATCh
ROLLBACK TRANSACTION
SET @record=-1 --失败
END CATCh
RETURN @record
END

当删除多条新闻类型时，咱们需要把拼接好的类型id，例如：1,2,4,5,12,34,穿入存储过程，分割字符的SQL数据库语句如下所示：

复制具体相关代码具体相关代码如下:

DECLARE @A VARChAR(5000)
DECLARE @i INT
SET @A='A,B,C,D,D,S,X,C,C,C,D,AAAA,DDDDDD,DEF,ERT,'
SET @i=ChARINDEX(',',@A)
WhILE @i>=1
BEGIN
PRINT LEFT(@A,@i-1)
SET @A=SUBSTRING(@A,@i 1,LEN(@A)-1)
SET @i=ChARINDEX(',',@A)
END

删除多条新闻类型SQL如下：

复制具体相关代码具体相关代码如下:

ALTER PROCEDURE [dbo].[proc_tb_news_type_selects_delete]
(
@typeID_list VARChAR(500),
@record TINYINT OUTPUT
)
AS
BEGIN
BEGIN TRY
BEGIN TRANSACTION
DECLARE @index INT
DECLARE @typeID INT
SET @typeID_list=RTRIM(LTRIM(@typeID_list))
SET @index=ChARINDEX(',',@typeID_list)
WhILE @index>=1
BEGIN
SET @typeID=CAST(LEFT(@typeID_list,@index-1) AS INT)
EXECUTE proc_tb_news_type_delete @typeID=@typeID
SET @typeID_list=SUBSTRING(@typeID_list,@index 1,LEN(@typeID_list)-1)
SET @index=ChARINDEX(',',@typeID_list)
END
COMMIT TRANSACTION
SET @record=0 --成功
END TRY
BEGIN CATCh
ROLLBACK TRANSACTION
SET @record=-1 --失败
END CATCh
RETURN @record
END