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    <p>You need to do this one time table setup (if you don't want to use a Numbers Table, see alternative solution below):</p> <pre><code>SELECT TOP 10000 IDENTITY(int,1,1) AS Number INTO Numbers FROM sys.columns s1 CROSS JOIN sys.columns s2 ALTER TABLE Numbers ADD CONSTRAINT PK_Numbers PRIMARY KEY CLUSTERED (Number) </code></pre> <p>Once the Numbers table is set up, use this query:</p> <pre><code>DECLARE @ParentTable table (ID int,Name varchar(20)) DECLARE @ChildTable table (ID int,ParentID int,Name varchar(20)) INSERT INTO @ParentTable VALUES (1,'Bob') INSERT INTO @ChildTable VALUES (1,1,'Jim') INSERT INTO @ChildTable VALUES (2,1,'Ned') SELECT DISTINCT dt.Name,c.Name FROM (SELECT CASE WHEN n.Number=1 THEN NULL ELSE p.ID END AS ID,p.Name FROM @ParentTable p INNER JOIN Numbers n ON 1=1 WHERE p.ID=1 AND n.Number&lt;=2 ) dt LEFT OUTER JOIN @ChildTable c ON dt.ID=c.ParentID ORDER BY 1,2 </code></pre> <p>OUTPUT:</p> <pre><code>Name Name -------------------- -------------------- Bob NULL Bob Jim Bob Ned (3 row(s) affected) </code></pre> <p><strong>alternative solution</strong> if you don't want to create a Numbers table you can use this method, returns the same output as above:</p> <pre><code>SELECT DISTINCT dt.Name,c.Name FROM (SELECT CASE WHEN n.Number=1 THEN NULL ELSE p.ID END AS ID,p.Name FROM @ParentTable p INNER JOIN (SELECT ROW_NUMBER() OVER(ORDER BY object_id) AS Number FROM sys.columns) n ON n.Number&lt;=2 WHERE p.ID=1 AND n.Number&lt;=2 ) dt LEFT OUTER JOIN @ChildTable c ON dt.ID=c.ParentID ORDER BY 1,2 </code></pre> <p>I was trying to use A CTE to expand the parent row, but it is hard without using a UNION!</p>
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    1. POHow do I select one parent row and additional rows for its children without a UNION?
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