SQL Server在动态SQL中等同于Oracle绑定变量? [英] What is the SQL Server equivalent of Oracle bind variables in dynamic SQL?
问题描述
在Oracle中,编写动态SQL时会执行以下操作:
In Oracle, when writing dynamic SQL one does something like this:
create or replace procedure myProc(n in number)
as
begin
execute immediate
'update myTable set myColumn = :n'
using n;
commit;
end;
然后神奇发生。 SQL Server中的等效概念/语法(如果有)是什么? (顺便说一句,我正在使用SQL Server 2005)
And then 'magic happens'. What, if any, is the equivalent concept / syntax in SQL Server? (BTW I'm using SQL Server 2005)
推荐答案
您将使用 sp_executesql
。绑定的变量如下所示: @ var1
。
You would use sp_executesql
. The bound variables look like this: @var1
.
在下面的链接中,有一个针对标准Northwind的示例查询数据库:
From the below link, an example query against the standard Northwind database:
DECLARE @IntVariable int;
DECLARE @SQLString nvarchar(500);
DECLARE @ParmDefinition nvarchar(500);
/* Build the SQL string one time.*/
SET @SQLString =
N'SELECT BusinessEntityID, NationalIDNumber, JobTitle, LoginID
FROM AdventureWorks2008R2.HumanResources.Employee
WHERE BusinessEntityID = @BusinessEntityID';
SET @ParmDefinition = N'@BusinessEntityID tinyint';
/* Execute the string with the first parameter value. */
SET @IntVariable = 197;
EXECUTE sp_executesql @SQLString, @ParmDefinition,
@BusinessEntityID = @IntVariable;
/* Execute the same string with the second parameter value. */
SET @IntVariable = 109;
EXECUTE sp_executesql @SQLString, @ParmDefinition,
@BusinessEntityID = @IntVariable;
完整的详细信息和示例语法在以下链接中:
Full details and example syntax are at the following links:
http://msdn.microsoft.com/en-us/library/ms188001.aspx
http:// msdn .microsoft.com / en-us / library / ms175170.aspx
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