In SQL, the ENABLE TRIGGER statement is used to enable a previously disabled trigger on a table. This is particularly useful if you have temporarily disabled a trigger to perform bulk operations or other tasks without the trigger interfering with the data modification process.
The basic syntax of the ENABLE TRIGGER statement is as follows:
ENABLE TRIGGER trigger_name ON table_name;
- trigger_name: This is the name of the trigger that you want to enable.
- table_name: This is the name of the table on which the trigger is defined.
Example
Assuming you have a trigger named my_trigger defined on a table called my_table, you can enable it using the following SQL command:
ENABLE TRIGGER my_trigger ON my_table;
Enabling All Triggers
If you want to enable all triggers on a specific table, you can use:
ENABLE TRIGGER ALL ON table_name;
Notes
1. The ability to enable or disable triggers may depend on your database management system (DBMS). Not all systems support this feature in the same way.
2. In systems like SQL Server, you might use ENABLE with the TRIGGER keyword directly.
3. For systems like PostgreSQL, you may need to use ALTER TABLE to enable the trigger, as shown below:
ALTER TABLE table_name ENABLE TRIGGER trigger_name;
Always consult your DBMS documentation for the exact syntax and capabilities.