Updating Records

The update statement is used to update or change records that match a specified criteria. This is accomplished by carefully constructing a where clause.

update "tablename"
set "columnname" = "newvalue"
 [,"nextcolumn" = "newvalue2"...]
where "columnname" OPERATOR "value" 
 [and|or "column" OPERATOR "value"];

 [] = optional

Examples:

update phone_book
  set area_code = 623
  where prefix = 979;

update phone_book
  set last_name = 'Smith', prefix=555, suffix=9292
  where last_name = 'Jones';

update employee
  set age = age+1
  where first_name='Mary' and last_name='Williams';