An index measures the performance of a basket of securities intended to replicate a certain area of the market, such as the Standard & Poor's 500.

1. countable noun. An index is a system by which changes in the value of something and the rate at which it changes can be recorded, measured, or interpreted.

Indexes power queries by providing a method to quickly lookup the requested data. Simply put, an index is a pointer to data in a table. An index in a database ...

A database index is a data structure that improves the speed of data retrieval operations on a database table at the cost of additional writes and storage ...

2019/12/09 · Indexes are meant to speed up the performance of a database, so use indexing whenever it significantly improves the performance of your database ...

2010/06/02 · An index is used to speed up searching in the database. MySQL has some good documentation on the subject (which is relevant for other SQL ...

noun · a value that identifies and is used to locate a particular element within a data array or table. · a reference table that contains the keys or references ...

2023/12/18 · Indexes over multiple columns, also known as composite indexes, speed up queries which filter on index's columns, but also queries which ...