Update only one select query field

Question

hello
how i can update select query result field in original table.
update table1 set field_1 from(select field_1 from table 1,table2,table3,table4 where table1.field_1=table1.field_1 and table2.field_2=table3.field_2 and table4.field_3=table1.field_4)
like that.is it possible!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!can u please help me to rewrite query/
select query returns result like that from different tables
lets example field_1 field_2 field_3 field_4
TIGER 1 V A
TIGER 2 F B
TIGER 3 R C
I need to update 'TIGER' instead of 'LION' in original table.
THANKS

Answer 1

Maybe something like
update table1
   set beast = (select animal
                  from <table_list>
                 where <predicates>
where beast = 'LION'when your query returns a single row
or when multiple rows are returned
update (select t1.beast,t2.animal
          from (select beast,
                       <join_columns_list>
                  from table1
                 where beast = 'LION'
               ) t1,
               (select animal,
                       <join_columns_list>
                  from <table_list>
                 where <predicates>
               ) t2
         where t1.<join_columns_list> = t2.<join_columns_list>
   set beast = animalRegards
Etbin