The DELETE statement deletes the TENSION data set and the A2 catalog.
MT=CATALOG only applies to A2 and is necessary because the default member
type for the DELETE statement is DATA. The CHANGE statement changes the name
of the A1 catalog to POSTDRUG. The EXCHANGE statement exchanges the names
of the WEIGHT and BODYFAT data sets. MEMTYPE= is not necessary in the CHANGE
or EXCHANGE statement because the default is MEMTYPE=ALL for each statement.
delete tension a2(mt=catalog);