Question

How would I convert the following to use INNER JOIN rather than nested SELECT?

SELECT 
    [Name].[NameValueID],
    [Name].[NameTypeID],
    [Name].[NameID],
    [Name].[Value]
FROM [Name] 
WHERE Name.NameTypeID IN ( SELECT NameTypeID FROM @tbNameType ) 
    OR Name.NameID IN ( SELECT NameID FROM @tbName) 

Answer 1

This one’s tricky because it’s an “OR” condition rather than an “AND”. But I think this would do it:

SELECT 
        [Name].[NameValueID],
        [Name].[NameTypeID],
        [Name].[NameID],
        [Name].[Value]
FROM [Name] 
INNER JOIN  ( SELECT NameTypeID FROM @tbNameType ) t ON t.NameTypeID=Name.NameTypeID

UNION

SELECT 
        [Name].[NameValueID],
        [Name].[NameTypeID],
        [Name].[NameID],
        [Name].[Value]
FROM [Name]
INNER JOIN ( SELECT NameID FROM @tbName) t ON t.NameID = Name.NameID