oracle小技巧，在线看oracle的错误的原因以及解决的方法

[12:22:41 oracle(db)@rac1 ~]$ oerr ora 810308103, 00000, "object no longer exists"// *Cause:  The object has been deleted by another user since the operation//          began, or a prior incomplete recovery restored the database to//          a point in time during the deletion of the object.// *Action: Delete the object if this is the result of an incomplete//          recovery.[12:22:55 oracle(db)@rac1 ~]$ oerrUsage: oerr facility errorFacility is identified by the prefix string in the error message.For example, if you get ORA-7300, "ora" is the facility and "7300"is the error.  So you should type "oerr ora 7300".If you get LCD-111, type "oerr lcd 111", and so on.[12:23:09 oracle(db)@rac1 ~]$ oerr ora 0155501555, 00000, "snapshot too old: rollback segment number %s with name \"%s\" too small"// *Cause: rollback records needed by a reader for consistent read are//         overwritten by other writers// *Action: If in Automatic Undo Management mode, increase undo_retention//          setting. Otherwise, use larger rollback segments[12:23:34 oracle(db)@rac1 ~]$