LAST_DDL_TIME

How to Resolve ORA-08186: invalid timestamp specified

by Ed Chen
March 17, 2023March 21, 2023

ORA-08186 Tried to perform a flashback query, but it failed with ORA-08186. SQL> select count(*) cnt from t1 as of timestamp to_timestamp('3023-02-20 00:53:08', 'yyyy-mm-dd hh24:mi:ss');… Read More »

How to Resolve ORA-01466: unable to read data - table definition has changed

by Ed Chen
March 16, 2023March 21, 2023

ORA-01466 Tried to perform a flashback query, but it failed with ORA-01466. SQL> select count(*) cnt from t1 as of timestamp to_timestamp('2023-02-19 22:15:00', 'yyyy-mm-dd hh24:mi:ss');… Read More »

How Oracle Unlock Table

by Ed Chen
September 28, 2022March 21, 2023

Lock Table Oracle provides LOCK TABLE statements to let users lock table as their needs. For example: SQL> conn hr/hr@orclpdb Connected. SQL> lock table employees… Read More »

LAST_DDL_TIME, How and Why

by Ed Chen
March 11, 2022March 21, 2023

LAST_DDL_TIME Generally speaking, LAST_DDL_TIME in ALL_OBJECTS or DBA_OBJECTS means that the last time of the object definition changed by Data Definition Language (DDL). But sometimes,… Read More »