问题
I want to create a report in MS SQL Server BIDS (SSMS and Visual Studio). The user would enter a list of email addresses as a parameter. So @pEmails would be 'foo@bluh.com', 'bar@meh.org', etc. These email addresses may or may not be in a table.
I can simply do:
and Table.Email in (@pEmails)
and that works, except I need to return the email address if it's NOT found as well. So the results would be something like:
|email |found in table|
|------------|--------------|
|foo@bluh.com| Y |
|bar@meh.org | N |
I was thinking I could take the list of values entered as the @pEmails parameter and create a temp table with them, which I could then left join with, but my attempts to do so have not worked out.
declare @pEmails table (EmailAddress varchar(255));
insert into @pEmails values (@ReportParameter1);
select
*
from
@pEmails
The above works if only a single value is put into @ReportParameter1, but not if multiples are in it.
I am using SQL Server 2008. Any suggestions on how best to proceed?
回答1:
As has been stated, you need some kind of split function, for analysis on the performance of various methods Split strings the right way – or the next best way is an excellent read. Once you have your function, you then need to define your query parameter as a string, rather than a table:
So your query would actually become:
DECLARE @pEmails TABLE (EmailAddress varchar(255));
INSERT @pEmails (EmailAddress)
SELECT Value
FROM dbo.Split(@pEmallString);
Then go to your dataset properties, and instead of passing the multivalue parameter @pEmails to the dataset, instead create a new one @pEmailString, and set the value as an expression, which should be:
=Join(Parameters!pEmails.Value, ",")
This turns your multivalue parameter into a single comma delimited string. It seems pretty backwards that you need to convert it to a delimited string, only to then split it in SQL, unfortunately I don't know of a better way.
回答2:
Here are some learnings on this topic (standing on the shoulders of the information elsewhere in this thread).
Set a parameter (select 'multiple values' checkbox):
InputList
Establish dataset query:
SELECT *
INTO #InputTemp
FROM STRING_SPLIT(@InputListJoin, ',')
SELECT LTRIM (value) AS ValueName FROM #InputTemp
Establish dataset parameters:
Name: @InputList | Value: [@InputList]
Name: @InputListJoin | Value(expression): =Join(Parameters!InputList.Value,", ")
The element names can be changed as needed.
You can now join #InputTemp to another table to find unmatched entries.
Somewhat on topic, other details that might be helpful:
[@InputList.IsMultiValue] --> true/false whether your parameter is multi-value (not whether there are multiple values)
[@InputList.Count] --> count of items in input list (excludes blank lines)
=Parameters!InputList.Value(2) --> return third value from list (counting from zero)
来源：https://stackoverflow.com/questions/40534211/turning-a-multi-value-parameter-into-a-temp-table-in-sql-server-business-intelli