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DECLARE @testString VARCHAR(20)
SET @testString = 'Big Bang Theory'


SELECT LEN(@testString) AS _Length,
	LEFT(@testString,3) AS _Left,
	RIGHT(@testString,6) AS _Right,
	SUBSTRING(@testString,5,4) AS _Substring,
	REPLACE(@testString,'Bang', 'Bazinga') AS _Replace,
	STUFF(@testString,5,0,'Big ') AS _Stuff