CONCAT function newly introduced from SQL Server 2012.
SQL Server 2008 will throw an error
'CONCAT' is not a recognized built-in function name
So in SQL Server 2008 we can use "+" operator to concat the 2 or more strings. It is always suggested to use cast your columns before using them. This operator will throw an error if the first operand is a number since it thinks will be adding and not concatenating
cast('data1' as varchar) + cast('data2' as varchar) + cast('data3' as varchar)
There are few differences between "CONCAT" and "+" operator
SELECT 'A' + 'B' + 'C'
SELECT CONCAT('A', 'B', 'C')
SELECT 'A' + 'B' + NULL
SELECT CONCAT('A', 'B', NULL)
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)
output will be ABC,ABC,NULL,AB respectively.
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