As a database administrator, you would possibly perhaps well well wish to search out out when a datafile became added to Oracle, maybe so you would possibly perhaps well well also ascertain dates linked to recordsdata. You will need to observe the factual design, to defend away from injure to the database, which would maybe perhaps well consequence in downtime. This article will present a pair of solutions for checking the date a datafile became added.
Definitely one of doubtlessly the most traditional programs to establish when a datafile became added is by having a stare on the timestamp within the alert log. In most conditions, Oracle will add a inform to the alert log indicating when the file became added, as properly as other data corresponding to who added it. To study the alert log, you would possibly perhaps well well have to access the host situation the set apart the Oracle database runs, then initiating the log file.
One other manner to establish a datafile addition is by viewing the catch redo logs. Within the catch redo logs, there wants to be a timestamp indicating doubtlessly the most up-to-date file addition. You can look the redo logs by querying the V$LOGMNR_CONTENTS dynamic efficiency desk, using a quiz corresponding to “SELECT * from V$LOGMNR_CONTENTS the set apart operation_code = ‘FILE ALLOCATED’;”.
You can moreover study the date that a datafile became added by using the “DBA_DATA_FILES” look. This look contains the date when a datafile title became added. You can employ the following quiz to transfer wanting the date: “SELECT creation_time FROM DBA_DATA_FILES WHERE file_name = ‘filename’”.
In rare conditions, you would possibly perhaps well well wish to establish when a datafile became added in Oracle by reviewing the UNDO tablespace. Oracle will add a line to the UNDO tablespace that signifies doubtlessly the most up-tp-date datafile addition. To safe this data, you would possibly perhaps well well also quiz the DBA_UNDO_EXTENTS look with the “segment_name” and “proprietor” fields – “SELECT * FROM DBA_UNDO_EXTENTS WHERE segment_name =’file_name’ AND proprietor = ‘owner_name’”.
In conclusion, checking the date a datafile became added to an Oracle database is a well-known assignment when investigating any concerns linked to the recordsdata. There are a variety of programs you would possibly perhaps well well also employ to establish when a file addition became made. You can study the alert log, quiz the catch redo log, look the DBA_DATA_FILES look, or quiz the DBA_UNDO_EXTENTS look.