https://ronaldbradford.com/tags/merge-indexes/ Recent content in Merge Indexes on Enterprise Data Architect | Principal Data Strategist | MySQL Subject Matter Expert | Author | Speaker Hugo -- gohugo.io en-us Mon, 13 Jun 2011 16:53:03 +0000 https://ronaldbradford.com/blog/utilizing-multiple-index-per-mysql-table-join-2011-06-13/ Mon, 13 Jun 2011 16:53:03 +0000 https://ronaldbradford.com/blog/utilizing-multiple-index-per-mysql-table-join-2011-06-13/ Historically it was considered that MySQL will generally use only one index per referenced table in a SQL query. In MySQL 5.0 the introduction of merge indexes enabled for certain conditions the possibility to utilize two indexes however this could result in worst performance then creating a better index.