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Use the index, Luke A guide to database performance for developers


A draw explaining SQL indexing to developers—no crap about administration.

SQL indexing is potentially the most productive tuning method—yet it is on the entire now not considerable during construction. Use The Index, Luke explains SQL indexing from grounds up and doesn’t stop at ORM tools love Hibernate.

Use The Index, Luke is the free net-version of SQL Performance Outlined. Within the event you are eager on this draw, preserve in tips getting the ebook. Even fill a watch on the store for diversified cool stuff that helps this draw.

SQL Indexing in MySQL, Oracle, SQL Server, and a lot others.

Use The Index, Luke presents indexing in a dealer agnostic model. Product explicit notes are supplied love right here:


Use The Index, Luke covers SQL indexing for IBM DB2. Tests were conducted with DB2 for Linux, UNIX and Home windows, (LUW) V10.5 via 11.5.


Use The Index, Luke covers SQL indexing for MySQL. Tests were conducted with MySQL 5.5 via 8.0.20.


Use The Index, Luke covers SQL indexing for the Oracle database. Tests were conducted with Oracle 11g via 19c.


Use The Index, Luke covers SQL indexing for PostgreSQL. Tests were conducted with PostgreSQL 9.0 via 12.

SQL Server

Use The Index, Luke covers SQL indexing for Microsoft SQL Server. Tests were conducted with SQL Server 2008R2 via 2019.

Maintain extra questions about SQL indexing or tuning? No field—fill a watch at my coaching and tuning products and services at

Desk of Contents

  1. Preface — Why is indexing a construction job?

  2. Anatomy of an Index — What does an index watch love?

    1. The Leaf Nodes — A doubly linked list

    2. The B-Tree — It’s a balanced tree

    3. Tiring Indexes, Section I — Two substances develop the index gradual

  3. The Where Clause — Indexing to improve search performance

    1. The Equals Operator — Staunch key search for

      1. Well-known Keys — Verifying index usage

      2. Concatenated Keys — Multi-column indexes

      3. Tiring Indexes, Section II — The predominant ingredient, revisited

    2. Functions — The utilize of capabilities within the where clause

      1. Case-Insensitive SearchUPPER and LOWER

      2. User-Outlined Functions — Boundaries of feature-basically based fully mostly indexes

      3. Over-Indexing — Withhold far from redundancy

    3. Bind Variables — For safety and performance

    4. Attempting to build up Ranges — Previous equality

      1. Better, Less and BETWEEN — The column expose revisited

      2. Indexing SQL LIKE FiltersLIKE is now not for fleshy-text search

      3. Index Combine — Why now not the usage of one index for each and each column?

    5. Partial Indexes — Indexing chosen rows

    6. NULL within the Oracle Database — An indispensable curiosity

      1. NULL in Indexes — Every index is a partial index

      2. NOT NULL Constraints — affect index usage

      3. Emulating Partial Indexes — the usage of feature-basically based fully mostly indexing

    7. Obfuscated Prerequisites — Normal anti-patterns

      1. Dates — Pay particular attention to DATE forms

      2. Numeric Strings — Don’t mix forms

      3. Combining Columns — utilize redundant where clauses

      4. Orderly Good judgment — The neatest technique to develop SQL gradual

      5. Math — Databases don’t resolve equations

  4. Attempting out and Scalability — About hardware

    1. Records Quantity — Sloppy indexing bites help

    2. Draw Load — Production load impacts response time

    3. Response Time and Throughput — Horizontal scalability

  5. The Join Operation — No longer gradual, if performed gorgeous

    1. Nested Loops — Concerning the N+1 selects field in ORM

    2. Hash Join — Requires an fully diversified indexing method

    3. Style-Merge Join ‌— Take care of a zipper on two sorted units

  6. Clustering Records — To within the reduction of IO

    1. Index Filter Predicates Deliberately Primitive — to tune LIKE

    2. Index-Finest Scan — Warding off table accumulate entry to

    3. Index-Organized Desk — Clustered indexes with out tables

  7. Sorting and Grouping — Pipelined expose by: the third energy

    1. Listed Uncover Bywhere clause interactions

    2. ASC/DESC and NULL FIRST/LAST — changing index expose

    3. Listed Team By — Pipelining neighborhood by

  8. Partial Outcomes — Paging efficiently

    1. Selecting Top-N Rows — in expose for you the first few rows most productive

    2. Fetching The Subsequent Page — The offset and survey systems compared

    3. Window-Functions — Pagination the usage of analytic queries

  9. Insert, Delete and Update — Indexing impacts on DML statements

    1. Insert — cannot take hold of train fill the profit of indexes

    2. Delete — uses indexes for the where clause

    3. Update — doesn’t affect all indexes of the table

Concerning the Creator

Photo of Markus Winand

Markus Winand is the SQL Renaissance Ambassador. He’s on a mission to introduce developers to the evolution of SQL within the 21st century. Markus is also employed as coach, speaker and consultant by skill of

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