On which type of column does an index typically give the biggest benefit?

Problem Statement

Explanation

Indexes shine when they can skip most rows. Low-selectivity predicates often end up scanning large portions of the table, reducing index value except in bitmaps or special cases.

Code Solution

SolutionRead Only

CREATE INDEX idx_email ON users(email);

Practice Sets

This question appears in the following practice sets:

Indexing Strategies & Access Paths

Next Question

Master Interviews
Anywhere, Anytime

On which type of column does an index typically give the biggest benefit?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews Anywhere, Anytime

On which type of column does an index typically give the biggest benefit?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews
Anywhere, Anytime