Summary of points to note about index merging

Please indicate the source for reprinting: mysql index merging: one sql can use multiple indexes Preface MySQL's index merging is not a new feature. It has been implemented as early as mysql5.0 version. The reason why I still write this blog post is because many people still retain the misconception that a SQL statement can only use one index. This article will illustrate how to use index merging through some examples. What is index merging Let's take a look at the description of index merging in the mysql document: The Index Merge method is used to retrieve rows with several range scans and to merge their results 

1. mysql index merge: one SQL can use multiple indexes

##Introduction: MySQL's index merging is not a new feature. It has been implemented as early as mysql5.0 version. The reason why I still write this blog post is because many people still retain the misconception that a SQL statement can only use one index. This article will use some examples to illustrate how to use index merging

2. coreseek configuration and incremental index merging index

Introduction:: This article mainly introduces coreseek configuration and incremental index merge index. Students who are interested in PHP tutorials can refer to it.

3. [Practical] Sphinx index merging script

Introduction: mkdir /usr/local/sphinx/ scripts----0. Create all main indexes#!/bin/bash#ocpyang@126.com#main_index_update.sh/usr/local/sphinx/bin/indexer src2 -c /usr/local/sphinx/etc/sphinx .conf --rotate /dev/null 21/usr/local/sphinx/bin/indexer src3 -c /usr/loca

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