What is SQLite index?

Does SQLite use index?

SQLite uses B-tree for organizing indexes. Note that B stands for balanced, B-tree is a balanced tree, not a binary tree. The B-tree keeps the amount of data at both sides of the tree balanced so that the number of levels that must be traversed to locate a row is always in the same approximate number.

How do I index a table in SQLite?

SQLite Create and Drop Index1Syntax: CREATE [UNIQUE] INDEX index_name ON table_name ( column_name [, ...] );2Parameters: index_name - Name of the index. ... 3Create Index:4Creating an Index on a Column. Here we are creating a table company. ... 5Create Index on Multiple Columns. ... 6Create UNIQUE Index. ... 7Collation. ... 8Drop Index.

When should you create an index?

Index the Correct Tables and Columns Create an index if you frequently want to retrieve less than about 15% of the rows in a large table. This threshold percentage varies greatly, however, according to the relative speed of a table scan and how clustered the row data is about the index key.

What is SQLite in simple words?

SQLite is an embedded SQL database engine. Unlike most other SQL databases, SQLite does not have a separate server process. SQLite reads and writes directly to ordinary disk files. A complete SQL database with multiple tables, indices, triggers, and views, is contained in a single disk file.