Adding ANALYZE causes the query to execute, and the numbers returned to report the real numbers of the query’s performance. The EXPLAIN command gives you the server’s estimated analysis of the performance of your query. One example is EXPLAIN ANALYZE, which is a big boon to query tuning. MySQL 8.0 also supports new commands that are not included in MySQL 5.7. There is also a new intersect clause to aid with sets. For example, if you have trouble writing subqueries, you will rejoice in the support for lateral-derived joins and common table expressions (CTEs). One major change is the enhancements to SQL (Structured Query Language) supported in MySQL 8.0 that have made it easier for developers and DBAs to support queries. MySQL 8.0 has been on the market since 2016, so it is a very stable option, but there are some significant changes compared to the previous edition. To start with, you should look at what is involved in the move from MySQL 5.7 to MySQL 8.0, which will be the only supported version of MySQL in the future. To prepare for the move, what should you be aware of? I’ve sketched out the costs and benefits of the various options below. As this is a representative sample of database installations, that means there are a lot of database servers out there that are just four months away from end of life. This is significant because, with four months to go, more than half of those running MySQL servers are currently on v5.7 according to the data received from those using Percona Monitoring and Management for their database management tasks and that have elected to share telemetry data with us. In October 2023, version 5.7 will reach end of life status, meaning that this version will no longer receive updates or security patches. MySQL fueled the rise of the LAMP stack and has been a trusty companion to many a developer and DBA over the years. MySQL is the most popular open source database in the world, according to DB-Engines, and it has ranked as the second most popular database overall for more than a decade.
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