# How to Create Indexes in SQLite

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To create an index in SQLite, you can use the CREATE INDEX command, as stated in the official SQLite documentation (https://www.sqlite.org/lang_createindex.html, section 1, as of September 2026). According to this documentation, the basic syntax is "CREATE INDEX index_name ON table_name (column1, column2, ...)" (1, SQLite documentation). For example, to create an index on the "name" column of the "employees" table, you would use the command "CREATE INDEX idx_name ON employees (name)" (2, SQLite documentation, section 2). Indexes can be created on one or more columns, and can be used to speed up queries that filter on those columns, as noted by the SQLite documentation (https://www.sqlite.org/queryplanner.html, section 4, as of September 2026). 
I could not verify the performance impact of creating an index on a column with high cardinality.

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