Where can you examine the dependencies of a trigger?

Where can you examine the dependencies of a trigger?

Dependencies for Triggers You can examine the ALL_DEPENDENCIES view to see the dependencies for a trigger. Example 6-14 shows the use of the SQL SELECT statement to display the dependencies for a trigger in the HR schema.

What are the types of triggers in Oracle?

Types of Triggers in Oracle

• DML Trigger: It fires when the DML event is specified (INSERT/UPDATE/DELETE)
• DDL Trigger: It fires when the DDL event is specified (CREATE/ALTER)
• DATABASE Trigger: It fires when the database event is specified (LOGON/LOGOFF/STARTUP/SHUTDOWN)

How do Oracle triggers work?

Oracle runs triggers of each type in a planned firing sequence when more than one trigger is fired by a single SQL statement. First, statement level triggers are fired, and then row level triggers are fired. Oracle manages the dependencies among triggers and schema objects referenced in the code of the trigger action.

How to find the SCN returned from Ora _ rowscn?

With the SCN returned from ORA_ROWSCN, you can still try to find the period of the change from views such as V$LOG_HISTORY ( FIRST_CHANGE#, NEXT_CHANGE#, FIRST_TIME, NEXT_TIME ). When the time of the last update is required, the actual value is typically maintained and stored in an extra column in the table. ORA_ROWSCN is not good enough for that.

How does the Ora rowscn Pseudocolumn work in Oracle?

ORA_ROWSCN Pseudocolumn. For each row, ORA_ROWSCN returns the conservative upper bound system change number (SCN) of the most recent change to the row. This pseudocolumn is useful for determining approximately when a row was last updated. It is not absolutely precise, because Oracle tracks SCNs by transaction committed for the block in which

Is there an Ora rowscn for Flashback Query?

ORA_ROWSCN is not supported for Flashback Query. Instead, use the version query pseudocolumns, which are provided explicitly for Flashback Query. Please refer to the SELECT flashback_query_clause for information on Flashback Query and “Version Query Pseudocolumns” for additional information on those pseudocolumns.

Is there a way to track SCNS in Oracle?

It is not absolutely precise, because Oracle tracks SCNs by transaction committed for the block in which the row resides. You can obtain a more fine-grained approximation of the SCN by creating your tables with row-level dependency tracking. Please refer to CREATE TABLE