我需要将“ id”数组传递给存储过程,以删除表中除与数组中的id匹配的行以外的所有行。
我如何以最简单的方式做到这一点?
我需要将“ id”数组传递给存储过程,以删除表中除与数组中的id匹配的行以外的所有行。
我如何以最简单的方式做到这一点?
Answers:
使用存储过程:
编辑: 序列表(或其他任何东西)的补充:
List<string> testList = new List<int>();
testList.Add(1);
testList.Add(2);
testList.Add(3);
XmlSerializer xs = new XmlSerializer(typeof(List<int>));
MemoryStream ms = new MemoryStream();
xs.Serialize(ms, testList);
string resultXML = UTF8Encoding.UTF8.GetString(ms.ToArray());
结果(可与XML参数一起使用):
<?xml version="1.0"?>
<ArrayOfInt xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<int>1</int>
<int>2</int>
<int>3</int>
</ArrayOfInt>
原始帖子:
传递XML作为参数:
<ids>
<id>1</id>
<id>2</id>
</ids>
CREATE PROCEDURE [dbo].[DeleteAllData]
(
@XMLDoc XML
)
AS
BEGIN
DECLARE @handle INT
EXEC sp_xml_preparedocument @handle OUTPUT, @XMLDoc
DELETE FROM
YOURTABLE
WHERE
YOUR_ID_COLUMN NOT IN (
SELECT * FROM OPENXML (@handle, '/ids/id') WITH (id INT '.')
)
EXEC sp_xml_removedocument @handle
如果您使用的是Sql Server 2008或更高版本,则每次将其传递给存储过程时,都可以使用称为表值参数(TVP)的方法,而不是对列表数据进行序列化和反序列化。
让我们开始创建一个简单的模式作为我们的游乐场:
CREATE DATABASE [TestbedDb]
GO
USE [TestbedDb]
GO
/* First, setup the sample program's account & credentials*/
CREATE LOGIN [testbedUser] WITH PASSWORD=N'µ×?
?S[°¿Q¥½q?_Ĭ¼Ð)3õļ%dv', DEFAULT_DATABASE=[master], DEFAULT_LANGUAGE=[us_english], CHECK_EXPIRATION=OFF, CHECK_POLICY=ON
GO
CREATE USER [testbedUser] FOR LOGIN [testbedUser] WITH DEFAULT_SCHEMA=[dbo]
GO
EXEC sp_addrolemember N'db_owner', N'testbedUser'
GO
/* Now setup the schema */
CREATE TABLE dbo.Table1 ( t1Id INT NOT NULL PRIMARY KEY );
GO
INSERT INTO dbo.Table1 (t1Id)
VALUES
(1),
(2),
(3),
(4),
(5),
(6),
(7),
(8),
(9),
(10);
GO
有了我们的模式和示例数据之后,我们现在可以创建我们的TVP存储过程:
CREATE TYPE T1Ids AS Table (
t1Id INT
);
GO
CREATE PROCEDURE dbo.FindMatchingRowsInTable1( @Table1Ids AS T1Ids READONLY )
AS
BEGIN
SET NOCOUNT ON;
SELECT Table1.t1Id FROM dbo.Table1 AS Table1
JOIN @Table1Ids AS paramTable1Ids ON Table1.t1Id = paramTable1Ids.t1Id;
END
GO
使用我们的模式和API,我们可以从程序中调用TVP存储过程,如下所示:
// Curry the TVP data
DataTable t1Ids = new DataTable( );
t1Ids.Columns.Add( "t1Id",
typeof( int ) );
int[] listOfIdsToFind = new[] {1, 5, 9};
foreach ( int id in listOfIdsToFind )
{
t1Ids.Rows.Add( id );
}
// Prepare the connection details
SqlConnection testbedConnection =
new SqlConnection(
@"Data Source=.\SQLExpress;Initial Catalog=TestbedDb;Persist Security Info=True;User ID=testbedUser;Password=letmein12;Connect Timeout=5" );
try
{
testbedConnection.Open( );
// Prepare a call to the stored procedure
SqlCommand findMatchingRowsInTable1 = new SqlCommand( "dbo.FindMatchingRowsInTable1",
testbedConnection );
findMatchingRowsInTable1.CommandType = CommandType.StoredProcedure;
// Curry up the TVP parameter
SqlParameter sqlParameter = new SqlParameter( "Table1Ids",
t1Ids );
findMatchingRowsInTable1.Parameters.Add( sqlParameter );
// Execute the stored procedure
SqlDataReader sqlDataReader = findMatchingRowsInTable1.ExecuteReader( );
while ( sqlDataReader.Read( ) )
{
Console.WriteLine( "Matching t1ID: {0}",
sqlDataReader[ "t1Id" ] );
}
}
catch ( Exception e )
{
Console.WriteLine( e.ToString( ) );
}
/* Output:
* Matching t1ID: 1
* Matching t1ID: 5
* Matching t1ID: 9
*/
使用更抽象的API(例如实体框架)来执行此操作可能会比较容易。但是,我现在没有时间亲自看一看。
这是最好的来源:
http://www.sommarskog.se/arrays-in-sql.html
使用链接创建一个拆分函数,并按如下方式使用它:
DELETE YourTable
FROM YourTable d
LEFT OUTER JOIN dbo.splitFunction(@Parameter) s ON d.ID=s.Value
WHERE s.Value IS NULL
这是基于上面链接的代码,应该为您做...
在使用我的函数之前,您需要设置一个“帮助器”表,每个数据库只需要执行一次此操作:
CREATE TABLE Numbers
(Number int NOT NULL,
CONSTRAINT PK_Numbers PRIMARY KEY CLUSTERED (Number ASC)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
DECLARE @x int
SET @x=0
WHILE @x<8000
BEGIN
SET @x=@x+1
INSERT INTO Numbers VALUES (@x)
END
使用此函数来拆分您的字符串,该字符串不会循环并且非常快:
CREATE FUNCTION [dbo].[FN_ListToTable]
(
@SplitOn char(1) --REQUIRED, the character to split the @List string on
,@List varchar(8000) --REQUIRED, the list to split apart
)
RETURNS
@ParsedList table
(
ListValue varchar(500)
)
AS
BEGIN
/**
Takes the given @List string and splits it apart based on the given @SplitOn character.
A table is returned, one row per split item, with a column name "ListValue".
This function workes for fixed or variable lenght items.
Empty and null items will not be included in the results set.
Returns a table, one row per item in the list, with a column name "ListValue"
EXAMPLE:
----------
SELECT * FROM dbo.FN_ListToTable(',','1,12,123,1234,54321,6,A,*,|||,,,,B')
returns:
ListValue
-----------
1
12
123
1234
54321
6
A
*
|||
B
(10 row(s) affected)
**/
----------------
--SINGLE QUERY-- --this will not return empty rows
----------------
INSERT INTO @ParsedList
(ListValue)
SELECT
ListValue
FROM (SELECT
LTRIM(RTRIM(SUBSTRING(List2, number+1, CHARINDEX(@SplitOn, List2, number+1)-number - 1))) AS ListValue
FROM (
SELECT @SplitOn + @List + @SplitOn AS List2
) AS dt
INNER JOIN Numbers n ON n.Number < LEN(dt.List2)
WHERE SUBSTRING(List2, number, 1) = @SplitOn
) dt2
WHERE ListValue IS NOT NULL AND ListValue!=''
RETURN
END --Function FN_ListToTable
您可以将此函数用作联接中的表:
SELECT
Col1, COl2, Col3...
FROM YourTable
INNER JOIN dbo.FN_ListToTable(',',@YourString) s ON YourTable.ID = s.ListValue
这是您的删除内容:
DELETE YourTable
FROM YourTable d
LEFT OUTER JOIN dbo.FN_ListToTable(',',@Parameter) s ON d.ID=s.ListValue
WHERE s.ListValue IS NULL
declare @ids nvarchar(1000)
set @ids = '100,2,3,4,5' --Parameter passed
set @ids = ',' + @ids + ','
select *
from TableName
where charindex(',' + CAST(Id as nvarchar(50)) + ',', @ids) > 0
我考虑将您的ID作为XML字符串传递,然后您可以将XML切入要连接的临时表中,也可以直接使用SP_XML_PREPAREDOCUMENT和OPENXML对XML进行查询。
我喜欢这个,因为它适合作为XElement传递,适合SqlCommand
(很抱歉,这是VB.NET,但您知道了)
<Extension()>
Public Function ToXml(Of T)(array As IEnumerable(Of T)) As XElement
Return XElement.Parse(
String.Format("<doc>{0}</doc>", String.Join("", array.Select(Function(s) String.Concat("<d>", s.ToString(), "</d>")))), LoadOptions.None)
End Function
这是sql存储的proc,简称,不完整!
创建程序[dbo]。[myproc](@blah xml)
AS ...在@ netwerkids.nodes(N'/ doc / d'中从(SELECT doc.t.value('。','int')中输入SomeID) )作为doc(t))
在SQL Server 2016中,您可以使用[]包装数组并将其作为JSON传递,请参见http://blogs.msdn.com/b/sqlserverstorageengine/archive/2015/09/08/passing-arrays-to-t-sql-procedures -as-json.aspx
您可以在SQL Server中使用STRING_SPLIT函数。您可以在此处查看文档。
DECLARE @YourListOfIds VARCHAR(1000) -- Or VARCHAR(MAX) depending on what you need
SET @YourListOfIds = '1,2,3,4,5,6,7,8'
SELECT * FROM YourTable
WHERE Id IN(SELECT CAST(Value AS INT) FROM STRING_SPLIT(@YourListOfIds, ','))