As a back-end development, MySQL use of essential and rational use of indexes and index tuning is one of the skills back-end developers must master. Among the problems of daily database, use the index accounted for most unreasonable.
MySQL is one of the most common work everyone relational database, the interview will also ask knowledge points. After we learn the basic operation of building a database, create tables and so stopped learning and specializes in the whole depth of MySQL.
But with the rapid development of Internet services. For high concurrent database, requiring high availability and other indicators have become more sophisticated, so this time, the mechanism underlying principle slowly being valued by the people.
Therefore a lot of front-line database of Internet companies for the principle mechanism is the interview will ask content.
For example, when you go to the interview, the interviewer asked you:
1. What is the nature of the index?
2, Samsung index have to understand it? How do you understand?
3, how to ensure the engine Innodb concurrent processing of transactions?
4, your company's SQL execution longest time is the number of seconds? Some analysts had reason? The idea is to solve what? And so on -
Then you will look ignorant force, the interviewer child is miserable. More than a few problems have not completely correct answer out of the little friends have to reflect on reflection, after all, this is the first-line Internet interview will ask knowledge ah!
MySQL so important? , Difficult to learn it? I personally believe that, MySQL master the following knowledge content to break through the bottleneck
1, grasp the overall architecture of MySQL, MySQL to understand the characteristics of the major characteristics of the storage engine.
2, in-depth MySQL index mechanism, so that each can perform the process of building a SQL data search in mind.
3, understand MySQL execution path in a SQL statement and the importance of each link. The timing of the implementation of standard SQL form.
4, understand MySQL Innodb transaction engine, lock, Redo / Undo, MVCC and other mechanisms. Innodb fully understand the engine of excellent design and so on.
For more than four face questions, I can answer it Well, welcome attention to the comments area and leave a message Oh!
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