How do you remove primary key constraints and indexes in Oracle?

To remove primary key constraints and indexes in Oracle database, you can use the following statement: 1. To delete a primary key constraint:

ALTER TABLE 表名
DROP CONSTRAINT 约束名;

2. Remove index:

DROP INDEX 索引名;

It is important to note that the index name is the name of the index to be deleted. Removal of primary key constraints and indexes requires appropriate permissions.