To update a record, you process an SQL update statement. Here we update the salary field for ABBOTT K.
First read the record to see the current value (the salary is 50817):
sel=. 'select * from tdata where name=''ABBOTT K''' ddfet__db sel ddsel__db ch +--------+-+----+----------+----------+-----++ |Abbott K|M|D103|1963-10-01|1983-09-01|50817|| +--------+-+----+----------+----------+-----++
Next we process an update statement:
us=. 'update tdata set salary=45000 where name=''ABBOTT K''' us ddsql__db ch 0
Finally, we read the record again, to ensure the update was successful:
sel=. 'select * from tdata where name=''ABBOTT K''' ddfet__db sel ddsel__db ch +--------+-+----+----------+----------+-----++ |Abbott K|M|D103|1963-10-01|1983-09-01|45000|| +--------+-+----+----------+----------+-----++