Insert dummy row in SQL select query

Question

I am working on SQL Server stored procedure. I have a table \'User\' having fields (Id, Name, Email,Address).

I have following query returning All Users

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Answer 1

SELECT 0 AS Id, 'All' AS Name
UNION ALL
SELECT Id, Name FROM Users;

Answer 2

You can even set a column numerically to keep the order even though UNION ALL is applied

SELECT 0 RNO, 0 AS Id, 'All' AS Name
UNION ALL
SELECT ROW_NUMBER() OVER(ORDER BY  Id)RNO, Id, Name 
FROM Users

This will work even though a Zero exists in your column Id(may be a junk value)