如果在IN子句中存储了以逗号(，)分隔的字符串，则可以使用charindex函数获取值。如果使用. net，则可以使用SqlParameters进行映射。

DDL Script:

CREATE TABLE Tags
    ([ID] int, [Name] varchar(20))
;

INSERT INTO Tags
    ([ID], [Name])
VALUES
    (1, 'ruby'),
    (2, 'rails'),
    (3, 'scruffy'),
    (4, 'rubyonrails')
;

t - sql:

DECLARE @Param nvarchar(max)

SET @Param = 'ruby,rails,scruffy,rubyonrails'

SELECT * FROM Tags
WHERE CharIndex(Name,@Param)>0

您可以在. net代码中使用上述语句并将参数映射为SqlParameter。

提琴手演示

编辑: 使用下面的脚本创建名为SelectedTags的表。

DDL Script:

Create table SelectedTags
(Name nvarchar(20));

INSERT INTO SelectedTags values ('ruby'),('rails')

t - sql:

DECLARE @list nvarchar(max)
SELECT @list=coalesce(@list+',','')+st.Name FROM SelectedTags st

SELECT * FROM Tags
WHERE CharIndex(Name,@Param)>0

这是一个可重复使用的变化的解决方案在马克托罗特的优秀答案。

扩展方法:

public static class ParameterExtensions
{
    public static Tuple<string, SqlParameter[]> ToParameterTuple<T>(this IEnumerable<T> values)
    {
        var createName = new Func<int, string>(index => "@value" + index.ToString());
        var paramTuples = values.Select((value, index) => 
        new Tuple<string, SqlParameter>(createName(index), new SqlParameter(createName(index), value))).ToArray();
        var inClause = string.Join(",", paramTuples.Select(t => t.Item1));
        var parameters = paramTuples.Select(t => t.Item2).ToArray();
        return new Tuple<string, SqlParameter[]>(inClause, parameters);
    }
}

用法:

        string[] tags = {"ruby", "rails", "scruffy", "rubyonrails"};
        var paramTuple = tags.ToParameterTuple();
        var cmdText = $"SELECT * FROM Tags WHERE Name IN ({paramTuple.Item1})";

        using (var cmd = new SqlCommand(cmdText))
        {
            cmd.Parameters.AddRange(paramTuple.Item2);
        }

请使用以下存储过程。它使用了一个自定义分割函数，可以在这里找到。

 create stored procedure GetSearchMachingTagNames 
    @PipeDelimitedTagNames varchar(max), 
    @delimiter char(1) 
    as  
    begin
         select * from Tags 
         where Name in (select data from [dbo].[Split](@PipeDelimitedTagNames,@delimiter) 
    end

步骤1:-

string[] Ids = new string[] { "3", "6", "14" };
string IdsSP = string.Format("'|{0}|'", string.Join("|", Ids));

步骤2:-

@CurrentShipmentStatusIdArray [nvarchar](255) = NULL

步骤3:-

Where @CurrentShipmentStatusIdArray is null or @CurrentShipmentStatusIdArray LIKE '%|' + convert(nvarchar,Shipments.CurrentShipmentStatusId) + '|%'

or

Where @CurrentShipmentStatusIdArray is null or @CurrentShipmentStatusIdArray LIKE '%|' + Shipments.CurrentShipmentStatusId+ '|%'

这里有另一种选择。只需将一个以逗号分隔的列表作为字符串参数传递给存储过程，然后:

CREATE PROCEDURE [dbo].[sp_myproc]
    @UnitList varchar(MAX) = '1,2,3'
AS
select column from table
where ph.UnitID in (select * from CsvToInt(@UnitList))

函数:

CREATE Function [dbo].[CsvToInt] ( @Array varchar(MAX))
returns @IntTable table
(IntValue int)
AS
begin
    declare @separator char(1)
    set @separator = ','
    declare @separator_position int
    declare @array_value varchar(MAX)

    set @array = @array + ','

    while patindex('%,%' , @array) <> 0
    begin

        select @separator_position = patindex('%,%' , @array)
        select @array_value = left(@array, @separator_position - 1)

        Insert @IntTable
        Values (Cast(@array_value as int))
        select @array = stuff(@array, 1, @separator_position, '')
    end
    return
end

在SQL Server 2016+中，另一种可能是使用OPENJSON函数。

OPENJSON中有关于这种方法的博客——按id列表选择行的最佳方法之一。

下面是一个完整的示例

CREATE TABLE dbo.Tags
  (
     Name  VARCHAR(50),
     Count INT
  )

INSERT INTO dbo.Tags
VALUES      ('VB',982), ('ruby',1306), ('rails',1478), ('scruffy',1), ('C#',1784)

GO

CREATE PROC dbo.SomeProc
@Tags VARCHAR(MAX)
AS
SELECT T.*
FROM   dbo.Tags T
WHERE  T.Name IN (SELECT J.Value COLLATE Latin1_General_CI_AS
                  FROM   OPENJSON(CONCAT('[', @Tags, ']')) J)
ORDER  BY T.Count DESC

GO

EXEC dbo.SomeProc @Tags = '"ruby","rails","scruffy","rubyonrails"'

DROP TABLE dbo.Tags