Return受UPDATE语句影响的行数
Return受UPDATE语句影响的行数
提问于 2009-07-09 11:18:39
如何获取存储过程(SQL Server2005)中受UPDATE查询影响的行数作为结果集。例如：
CREATE PROCEDURE UpdateTables
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
UPDATE Table1 Set Column = 0 WHERE Column IS NULL
UPDATE Table2 Set Column = 0 WHERE Column IS NULL
UPDATE Table3 Set Column = 0 WHERE Column IS NULL
UPDATE Table4 Set Column = 0 WHERE Column IS NULL
END然后返回：
Table1 Table2 Table3 Table4
32 45 0 3回答 3
Stack Overflow用户
回答已采纳
发布于 2009-07-09 11:22:01
CREATE PROCEDURE UpdateTables
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
DECLARE @RowCount1 INTEGER
DECLARE @RowCount2 INTEGER
DECLARE @RowCount3 INTEGER
DECLARE @RowCount4 INTEGER
UPDATE Table1 Set Column = 0 WHERE Column IS NULL
SELECT @RowCount1 = @@ROWCOUNT
UPDATE Table2 Set Column = 0 WHERE Column IS NULL
SELECT @RowCount2 = @@ROWCOUNT
UPDATE Table3 Set Column = 0 WHERE Column IS NULL
SELECT @RowCount3 = @@ROWCOUNT
UPDATE Table4 Set Column = 0 WHERE Column IS NULL
SELECT @RowCount4 = @@ROWCOUNT
SELECT @RowCount1 AS Table1, @RowCount2 AS Table2, @RowCount3 AS Table3, @RowCount4 AS Table4
ENDStack Overflow用户
发布于 2009-07-09 12:13:13
这正是SQL Server2005以后版本中的OUTPUT子句的出色之处。
示例
CREATE TABLE [dbo].[test_table](
[LockId] [int] IDENTITY(1,1) NOT NULL,
[StartTime] [datetime] NULL,
[EndTime] [datetime] NULL,
PRIMARY KEY CLUSTERED
(
[LockId] ASC
) ON [PRIMARY]
) ON [PRIMARY]
INSERT INTO test_table(StartTime, EndTime)
VALUES('2009 JUL 07','2009 JUL 07')
INSERT INTO test_table(StartTime, EndTime)
VALUES('2009 JUL 08','2009 JUL 08')
INSERT INTO test_table(StartTime, EndTime)
VALUES('2009 JUL 09','2009 JUL 09')
INSERT INTO test_table(StartTime, EndTime)
VALUES('2009 JUL 10','2009 JUL 10')
INSERT INTO test_table(StartTime, EndTime)
VALUES('2009 JUL 11','2009 JUL 11')
INSERT INTO test_table(StartTime, EndTime)
VALUES('2009 JUL 12','2009 JUL 12')
INSERT INTO test_table(StartTime, EndTime)
VALUES('2009 JUL 13','2009 JUL 13')
UPDATE test_table
SET StartTime = '2011 JUL 01'
OUTPUT INSERTED.* -- INSERTED reflect the value after the UPDATE, INSERT, or MERGE statement is completed
WHERE
StartTime > '2009 JUL 09'结果将返回以下内容
LockId StartTime EndTime
-------------------------------------------------------
4 2011-07-01 00:00:00.000 2009-07-10 00:00:00.000
5 2011-07-01 00:00:00.000 2009-07-11 00:00:00.000
6 2011-07-01 00:00:00.000 2009-07-12 00:00:00.000
7 2011-07-01 00:00:00.000 2009-07-13 00:00:00.000在您的特定情况下，由于不能将聚合函数与OUTPUT一起使用，因此需要在表变量或临时表中捕获INSERTED.*的输出，并对记录进行计数。例如,
DECLARE @temp TABLE (
[LockId] [int],
[StartTime] [datetime] NULL,
[EndTime] [datetime] NULL
)
UPDATE test_table
SET StartTime = '2011 JUL 01'
OUTPUT INSERTED.* INTO @temp
WHERE
StartTime > '2009 JUL 09'
-- now get the count of affected records
SELECT COUNT(*) FROM @tempStack Overflow用户
发布于 2009-07-09 11:23:23
您可能需要在执行过程中收集统计数据，但@@ROWCOUNT捕获了以下内容：
declare @Fish table (
Name varchar(32)
)
insert into @Fish values ('Cod')
insert into @Fish values ('Salmon')
insert into @Fish values ('Butterfish')
update @Fish set Name = 'LurpackFish' where Name = 'Butterfish'
select @@ROWCOUNT --gives 1
update @Fish set Name = 'Dinner'
select @@ROWCOUNT -- gives 3页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/1103260
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