How to set the auto-increment for the primary key in Oracle.

In Oracle, you can set up auto-increment primary keys by using sequences and triggers. The specific steps are as follows:

1. Create a sequence to generate incrementing primary key values.
2. Generate a sequence called “your_sequence_name” that starts at 1, increments by 1, and does not cache values.
3. Create a trigger that will generate a new primary key value from a sequence and insert it into the table when data is inserted.
4. Create a trigger called “your_trigger_name” that fires before inserting into “your_table_name”. For each row being inserted, set the primary key column to the next value from the sequence “your_sequence_name”.
5. Associate the trigger with the table.
6. Add a primary key constraint to your table by using the ALTER TABLE statement.

In the example above, your_sequence_name represents the name of the sequence, your_trigger_name represents the name of the trigger, your_table_name represents the name of the table, your_primary_key_column represents the name of the primary key column, and your_constraint_name represents the name of the primary key constraint.

By following the steps above, you can set up an auto-increment primary key in Oracle database.