Converting comma-separated value to in subquery - sql

Question

I have following query :
Set #OrderStatuses = 'Cancelled,Complete'
Select *
From TableName
Where Status in (#OrderStatuses)
The Status is what I am receiving externally and it fails to fetch any result as, what we actually need to process is:
Select *
From TableName
Where Status in ('Cancelled', 'Complete');
#OrderStatuses can contain any number of comma-separated values.

Answer 1

One method is dynamic SQL:
declare #sql nvarchar(max);
set #sql = 'Select * from TableName Where Status in (#list)';
set #sql = replace(#sql, '#list', '#OrderStatuses');
exec sp_executesql #sql;
Note: You cannot pass a list in as a parameter.
You can also use like:
Select *
from TableName
Where ',' + #OrderStatuses + ',' like '%,' + Status + ',%';
However, this cannot use an index for the the comparison.

Answer 2

You will need to use split string function and process the rest..
;with cte
as
(
select * from split_strings(#orderstatus,',')
)
select * from table where status in (select item from cte)

Answer 3

You must add the list as a Table-Valued Parameter
Here are two methods I use to convert any IEnumerable list of items (in this case, integers) into a Table Valued Parameter. You have to have created/defined a User Defined type (UDT) for the resultant table in your database. In the example below the UDT is named dbo.keyIds and is created (once) with this SQL:
CREATE TYPE [dbo].[KeyIds]
AS TABLE(pkId int NOT NULL, PRIMARY KEY CLUSTERED
( [pkId] ASC) WITH (IGNORE_DUP_KEY = OFF)
)
The c# code is:
public class DbParamList : List<IDbDataParameter>
{
public void AddSQLTableParm<T>(
string parmName, IEnumerable<T> values)
{
var parm = new SqlParameter(parmName, CreateDataTable(values))
{
SqlDbType = SqlDbType.Structured,
TypeName = "dbo.keyIds"
};
Add(parm);
}
internal static DataTable CreateDataTable<T>(IEnumerable<T> values)
{
var dt = new DataTable();
var props = typeof (T).GetProperties();
if (props.Length > 0)
{
foreach (var col in props)
dt.Columns.Add(col.Name, col.PropertyType);
foreach (var id in values)
{
var newRow = dt.NewRow();
foreach (var prop in id.GetType().GetProperties())
newRow[prop.Name] = prop.GetValue(id, null);
dt.Rows.Add(newRow);
}
}
else
{
dt.Columns.Add("ids");
foreach (var id in values) dt.Rows.Add(id);
}
return dt;
}
}