更新时间:2022-11-25 15:43:54
在SQL Server的2008+也有更简单的方法在一个单独的语句来插入多行。例如这个语法是有效的:
In SQL Server 2008+ there are easier ways to insert multiple rows in a single statement. For example this syntax is valid:
INSERT dbo.table(col1, col2) VALUES
(1, 2),
(2, 3),
(3, 4);
以上将插入三行。在旧版本,你可以做稍微详细的东西,如:
The above will insert three rows. On older versions you can do slightly more verbose things such as:
INSERT dbo.table(col1, col2)
SELECT 1, 2
UNION ALL SELECT 2, 3
UNION ALL SELECT 3, 4;
当然你的的ExecuteNonQuery
不必是一个命令,你可以通过这个作为一个字符串,它仍然可以工作:
Of course your ExecuteNonQuery
does not have to be a single command, you can pass this as a single string and it will still work:
INSERT dbo.table(col1, col2) VALUES(1, 2);
INSERT dbo.table(col1, col2) VALUES(2, 3);
INSERT dbo.table(col1, col2) VALUES(3, 4);
如果你想这样做在存储过程中,您可以轻松地在多值进行拆分参数,例如,如果你在下面的字符串传递:
If you want to do this in a stored procedure, you can easily perform a split on multi-valued parameters, for example if you pass in the following string:
1,2;2,3;3,4
您可以处理使用像我这里张贴一个函数的值:
You could process those values using a function like the one I posted here:
所以你的过程可能是这样的:
So your procedure might look like this:
CREATE PROCEDURE dbo.AddOrderLineItems
@LineItems VARCHAR(MAX)
AS
BEGIN
SET NOCOUNT ON;
INSERT dbo.OrderItems(Product, Quantity)
SELECT Product, Quantity FROM dbo.MultiSplit(@LineItems);
END
GO
和你会使用C#相当于调用它:
And you would call it using the C# equivalent of:
EXEC dbo.AddOrderLineItems @LineItems = '1,2;2,3;3,4';
或阿列克谢的建议你可以使用表值参数。一个简单的例子:
Or you could use table-valued parameters as suggested by Alexey. A quick example:
CREATE TYPE OrderLineItem AS TABLE
(
Product INT,
Quantity INT
);
然后,你可以创建一个过程:
Then you can create a procedure:
CREATE PROCEDURE dbo.AddOrderLineItems
@LineItems OrderLineItem READONLY
-- other parameters
AS
BEGIN
SET NOCOUNT ON;
INSERT dbo.OrderItems(Product, Quantity)
SELECT Product, Quantity FROM @LineItems;
END
GO
然后在你的C#代码创建了相当于TVP(我又不是你想这样做的家伙,你可以在这里看到一个例子。一>)
但也有一些注意事项,请看看这个问题:
However there are some caveats, please look at this question: