You define component methods using cffunction tags. The following example defines a CFC that contains two methods, getall and getsalary:
<cfcomponent>
<cffunction name="getall" output="false" returntype="query">
<cfset var queryall="">
<cfquery name="queryall" datasource="cfdocexamples">
SELECT * FROM EMPLOYEE
</cfquery>
<cfreturn queryall>
</cffunction>
<cffunction name="getsalary" output="false">
<cfset var getNamesandSalary="">
<cfquery name="getNamesandSalary" datasource="cfdocexamples">
SELECT FirstName, LastName, Salary FROM EMPLOYEE
</cfquery>
<cfreturn getNamesandSalary>
</cffunction>
</cfcomponent>
Because component methods are ColdFusion functions, most of their features and coding techniques are identical to those of user-defined functions. For more information on using the cffunction tag to create functions, see Writing and Calling User-Defined Functions. Like other ColdFusion functions, CFC methods can display information directly by generating output, or can return a value to the code or client that invoked the method.
You use the following cffunction tag attributes only for CFCs:
displayname and hint attributes, which document the CFC; for more information, see Documenting CFCs.
access attribute, which controls access to the CFC; for more information, see Using access security.
For detailed reference information on the cffunction tag, see CFML Reference.