sql - Update largest date, matching two fields -


tables

hi, i'm looking update last column in blank table. picture shows input , desired output. trying pick largest date workorder , state match.

i've tried couple different codes:

update mytable set mytable.orderstartdate = max(table2.earliestdate) mytable table2 (mytable.workorder = table2.workorder ,  mytable.state = table2.state) ;

"syntax error (missing operator) in query expression 'max(table2.earliestdate) mytable table2'."

update mytable set mytable.orderstartdate = ( select max(earliestdate) mytable table2 (mytable.workorder = table2.workorder ,  mytable.state = table2.state) ) ;

"operation must use updateable query"

edit - click tables link image.

write pl/sql code.

  1. first, select distinct workorder , state , capture in variables.
  2. now, iterate list , write query max date i.e. max(date) using work_order , state in clause. capture date.
  3. now, in same loop write update query setting max(date) , workorder , state in clause.

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