DECLARE @City AS TABLE (
[Code] INT NOT NULL PRIMARY KEY
,[City] NVARCHAR(255)
)
DECLARE @isRequired BIT = 0;
INSERT INTO @City VALUES (101, 'Newcastle')
INSERT INTO @City VALUES (102, 'Ontario')
INSERT INTO @City VALUES (103, 'Torronto')
SET @isRequired = 1
IF @isRequired = 0
SELECT
[Code] = -1
,[City] = '<Not selected>'
UNION
SELECT
[Code]
,[City]
FROM @City
ORDER BY [City]
ELSE
SELECT
[Code]
,[City]
FROM @City
ORDER BY [City]
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