PPT Slide
So, if the column specified in nvl( )
is not NULL, the value in
the column is returned, while
the special string is returned.
The nvl( ) function can be used
on columns of all datatypes, but
the "value if NULL" argument
must be the same datatype as
the column specified. Basic syntax
for nvl( ) is as follows:
NVL(column_name, value_if_null)