ALTER TABLE your_table ADD COLUMN dba_date DATE DEFAULT (date('now'));
SELECT name, created FROM v$containers ORDER BY created DESC;
Solution: SELECT * FROM Exam. ORDER BY ExamDate; The result looks like this (the rows are sorted in ascending order by ExamDate ): LearnSQL.com
The NEW_DBA_DATE_DESC view is designed as a specialized administrative catalog window. Its primary function is to expose database objects sorted strictly by their creation or modification timestamps in descending order ( DESC ).
The TransactionLogs table had over 500 million rows. Without a descending index on the created_date column, the database had to perform a full table scan—reading every single row from oldest to newest just to flip them and show the "newest" ones first.
| Issue | Solution | |-------|----------| | sys.databases returns same creation date for restored databases | Restore retains original create_date. Instead, use first_seen_date from a DBA-maintained log. | | No creation date in MySQL | Use OS file stats or enable audit log. | | PostgreSQL OID sorting is inaccurate | Implement a CREATE DATABASE event trigger to log timestamps. | | Timezone confusion | Always store and compare in UTC, convert on display. |
If you are a new database administrator, mastering this command is essential for several daily tasks:
Embracing the date DESC mindset means you are always looking at the leading edge of your data. You aren't looking at history; you are looking at the present moment to predict the future. For a new DBA, that perspective is invaluable.
Restricts the record type to fictitious business names, trade names, or assumed names.
Include a simplified Entity-Relationship Diagram (ERD). Experts recommend using dedicated tools like ER/Studio or Erwin rather than generic drawing apps like Visio.
SELECT owner, object_name, last_ddl_time FROM new_dba_date_desc WHERE object_type IN ('PROCEDURE', 'FUNCTION', 'PACKAGE', 'PACKAGE BODY') AND owner NOT IN ('SYS', 'SYSTEM'); Use code with caution. Performance Optimization and Underlying Mechanics
ALTER TABLE your_table ADD COLUMN dba_date DATE DEFAULT (date('now'));
SELECT name, created FROM v$containers ORDER BY created DESC;
Solution: SELECT * FROM Exam. ORDER BY ExamDate; The result looks like this (the rows are sorted in ascending order by ExamDate ): LearnSQL.com
The NEW_DBA_DATE_DESC view is designed as a specialized administrative catalog window. Its primary function is to expose database objects sorted strictly by their creation or modification timestamps in descending order ( DESC ).
The TransactionLogs table had over 500 million rows. Without a descending index on the created_date column, the database had to perform a full table scan—reading every single row from oldest to newest just to flip them and show the "newest" ones first.
| Issue | Solution | |-------|----------| | sys.databases returns same creation date for restored databases | Restore retains original create_date. Instead, use first_seen_date from a DBA-maintained log. | | No creation date in MySQL | Use OS file stats or enable audit log. | | PostgreSQL OID sorting is inaccurate | Implement a CREATE DATABASE event trigger to log timestamps. | | Timezone confusion | Always store and compare in UTC, convert on display. |
If you are a new database administrator, mastering this command is essential for several daily tasks:
Embracing the date DESC mindset means you are always looking at the leading edge of your data. You aren't looking at history; you are looking at the present moment to predict the future. For a new DBA, that perspective is invaluable.
Restricts the record type to fictitious business names, trade names, or assumed names.
Include a simplified Entity-Relationship Diagram (ERD). Experts recommend using dedicated tools like ER/Studio or Erwin rather than generic drawing apps like Visio.
SELECT owner, object_name, last_ddl_time FROM new_dba_date_desc WHERE object_type IN ('PROCEDURE', 'FUNCTION', 'PACKAGE', 'PACKAGE BODY') AND owner NOT IN ('SYS', 'SYSTEM'); Use code with caution. Performance Optimization and Underlying Mechanics