The value in the column <si>
is set to the value <f>, increases it by <f>, or decreases it by <f> for all
lines selected. The WHERE clause specifies the lines that are changed. If you
omit the WHERE clause, all lines are changed.
UPDATE <dbtab> FROM <wa>.
UPDATE <dbtab> FROM TABLE
This deletes the line that
has the same primary key as the work area <wa>, or deletes all the lines in the
database that have the same primary key as a line in the internal table <itab>.
The work area <wa> or the lines of the internal table <itab> must have at least
the same length and alignment as the lines of the database table.