These query results are not updatable, please include ROWID or use Select ... For update to get updatable results!

Today, using the Pl/sql tool to manipulate table data in an Oracle database, you can not modify it, as prompted on the prompt box, resolved as follows:
Select T.id,t.title,t.content,t.cperson,t.cdate,t.sdate from T_notice t for update;

Now the query out of the data click Modify can be normal to modify, after the completion of the modification can not forget to submit!

As long as someone uses it:

Select t.* from table name t where field =xxx for update

Instead of:

Select t.rowid,t.* from table name t where field =xxx for update

This occurs when you perform a data update operation.

For update without ROWID, is a very silly x behavior, just like using SVN for source modification without first getting the latest.