What are Indexes in SQL Database? What is the advantage and disadvantage of Indexes?
Indexes are schema objects in a SQL database that can boost query performance while executing queries with a filter condition using where clause.
Indexes are used to retrieve data from databases very fast. An Index is a quick lookup table that is used to find a record that user search very frequently. An index helps to speed up select queries and where clauses, but it slows down data input, with the update and the insert statements.