SQL0412N-SQLSTATE=42823

db2 => insert into table1 ( MERCHANT_ID,SECRET_KEY) values( select '2' as MERCHANT_ID,SECRET_KEY from table1 where SECRET_KEY='88888888')
DB21034E  The command was processed as an SQL statement because it was not a
valid Command Line Processor command.  During SQL processing it returned:
SQL0412N  Multiple columns are returned from a subquery that is allowed only
one column.  SQLSTATE=42823

删除values

db2 => insert into table1 ( MERCHANT_ID,SECRET_KEY)  select '2' as MERCHANT_ID,SECRET_KEY from table1 where SECRET_KEY='88888888'
DB20000I  The SQL command completed successfully.