sql - How do I update a subset of values in DB2 based on related tables? -


i trying remove last 10 characters clob field in db2 database. can using:

update  report set     comment = left(comment, (length(comment) - 10))

however, want limit truncation subset of rows based on whether or not report in current reporting period. tried this...

update  report set     comment =         (   select  left(comment, (length(comment) - 10))                report                      inner join report_period                     on report.report_period_id = report_period.report_period_id                report_period.name = '2013 interim report'  )

...but get

the result of scalar fullselect, select statement, or values statement more 1 row

what doing wrong?

never mind... asking question helped clear in head. had move join clause....

update  report set     comment = left(comment, (length(comment) - 10))   report_id in         (   select  report_id                 report                      inner join report_period                     on report.report_period_id = report_period.report_period_id                report_period.name = '2013 interim report'  )

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