Creating an index helps improve query performance.
Indexes are created on columns that are frequently searched.
This reduces query execution time.
Before creating an index, the database must be selected.
Indexes are created on existing tables.
They do not change table data.
Indexes are commonly created on columns used in WHERE, JOIN, and ORDER BY clauses.
This improves search efficiency.
The CREATE INDEX command is used to create an index.
An index name is provided for identification.
One or more columns can be indexed.
Indexes speed up SELECT queries significantly.
However, unnecessary indexes should be avoided.
Proper indexing improves database performance.