Update script error

Question

hi ,
i need to update one field : ind_sign to value : Y . based on the value from other
table . i am getting ora-01427 error . please help in fixing this.
update reg a set a.ind_sign = ( select 'Y'
from reg b, attach c where b.key =
c.key and c.cde = 'NEW')
regards,
Karun

Answer 1

You're joining in the inner query, but there is no WHERE clause in the outer query and nothing that joins to the table you're updating.
You may want something like
update reg a
   set a.ind_sign = 'Y'
where exists ( select 1
                  from attach c
                 where a.key = c.key
                   and c.cde = 'NEW' )Justin
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