User defined function sql

Syntax to Create User Defined Functions in SQL

CREATE FUNCTION <function_name> (<@paramater_name>    <datatype>)
RETURNS <return_datatype>
AS
BEGIN
 	<DML statements>
    RETURN expression
END

Source: geeksarray.com

Functions with parameters SQL

EXEC @OrderID = dbo.GetOrderID
	@OrderType = @OrderType,
	@ServiceSpeed = @Qty,
	@Qty = @ServiceSpeed;

Source: scribnasium.com

User defined variables in sql

SET @var_name = expr [, @var_name = expr] ...

User defined function sql

Collation is defined as a set of rules
that determine how data can be sorted 
as well as compared. Character data is
sorted using the rules that define the 
correct character sequence along with
options for specifying case-sensitivity,
character width etc.

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