What is the method for adding fields and comments in Oracle?

To add columns and comments to an Oracle table, you can use the ALTER TABLE statement. Here is an example of adding new columns and comments to a table:

1. Add a new field:

ALTER TABLE table_name
ADD column_name data_type;

For example, if you want to add a field called “department” to a table named “employees” with a data type of VARCHAR2(50), you can execute the following statement:

ALTER TABLE employees
ADD department VARCHAR2(50);

1. Add comments:

COMMENT ON COLUMN table_name.column_name
IS 'Your comment here';

For example, if you want to add a comment to the “department” field in the “employees” table, you can execute the following statement:

COMMENT ON COLUMN employees.department
IS 'The department where the employee works';

With these statements, you can add new fields and comments to an Oracle table.