I have a table like below and I have to prepare a SQL Server stored procedure to accept the parameter to filter on a single column or multiple columns to retrieve the info from this table
我有一个像下面的表,我必须准备一个SQL Server存储过程来接受参数来筛选单个列或多个列以从此表中检索信息
SERVER Application Environment
--------------------------------
SRV1 APP1 ENV1
SRV2 APP2 ENV1
SRV3 APP1 ENV2
SRV4 APP3 ENV1
SRV5 APP2 ENV2
The procedure should accept parameters are like below
该程序应该接受如下参数
EXEC GetSrvinfo @server = 'SRV1'
EXEC GetSrvinfo @application = 'APP1'
EXEC GetSrvinfo @environment = 'ENV1'
EXEC GetSrvinfo @environment = 'ENV1', @application = 'APP1'
EXEC GetSrvinfo @server = 'SRV1', @application = 'APP1'
So I have prepared this procedure with below stored procedure
所以我用下面的存储过程准备了这个程序
CREATE PROCEDURE [dbo].[GetSrvinfo]
(@server VARCHAR(10) = NULL,
@application VARCHAR(10) = NULL,
@environment VARCHAR(10) = NULL)
AS
BEGIN
SELECT *
FROM [SRVINFO] WITH (NOLOCK)
WHERE [SERVER] = @server OR COALESCE(@server,'') = ''
AND ([Application] = @application OR COALESCE(@application, '') = '')
AND ([Environment] = @environment OR COALESCE(@environment, '') = '')
END
It is working fine for any single parameters but not working for the multiple parameters.
它适用于任何单个参数,但不适用于多个参数。
1 个解决方案
#1
1
you are missing parenthesis around the around the server section of the where clause, also you can use is null
instead of coalesce(@, '') = ''
你在where子句的服务器部分周围缺少括号,也可以使用null而不是coalesce(@,'')=''
CREATE PROCEDURE [dbo].[GetSrvinfo]
(@server varchar(10) = null, @application varchar(10) = null, @ environment varchar(10) = null)
AS
BEGIN
SELECT *
FROM
[SRVINFO] WITH (NOLOCK)
WHERE ([SERVER] = @server OR @server is null)
AND ([Application] = @application OR @application is null)
AND ([Environment] = @environment OR @environment is null)
END
#1
1
you are missing parenthesis around the around the server section of the where clause, also you can use is null
instead of coalesce(@, '') = ''
你在where子句的服务器部分周围缺少括号,也可以使用null而不是coalesce(@,'')=''
CREATE PROCEDURE [dbo].[GetSrvinfo]
(@server varchar(10) = null, @application varchar(10) = null, @ environment varchar(10) = null)
AS
BEGIN
SELECT *
FROM
[SRVINFO] WITH (NOLOCK)
WHERE ([SERVER] = @server OR @server is null)
AND ([Application] = @application OR @application is null)
AND ([Environment] = @environment OR @environment is null)
END