Since "Index" is not a standard term for song lyrics, it is likely you are looking for a (the lyrics written out in English text) or a translation.
(a technical term for performance optimization), this feature involves creating an index that includes all columns needed for a query so the database doesn't need to visit the main table. Are you asking about the geographic reach of the health program or the technical setup of a database index? PostgreSQL Covering Indexes: Beyond Regular Indexes index of saathiya