MACROMEDIA COLDFUSION 4.5-CFML LANGUAGE Reference page 113

Chapter 1: ColdFusion Tags 89
Example
<!--- This example shows the CFGRID, CFGRIDCOLUMN, CFGRIDROW,
and CFGRIDUPDATE tags in action --->
...
<!--- If the gridEntered form field has been tripped,
perform the gridupdate on the table specified in the database.
Using the default value keyonly=yes allows us to change only
the information that differs from the previous grid --->
<CFIF IsDefined("form.gridEntered") is True>
<CFGRIDUPDATE GRID="FirstGrid" DATASOURCE="cfsnippets"
TABLENAME="CourseList" KEYONLY="Yes">
</CFIF>
...