Read some good articles about MySQL execution plan

To understand the MySQL implementation process, it is true that the search keyword is replaced by "MySQL statement execution plan", after all, "plan" the word more standard
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http://blog.csdn.net/u014044812/article/details/51004754
This blog describes the order in which parts of the SELECT statement are executed, before encountering a visualization tool or something, and then discovering that it is the function of SQL Server
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How to read MySQL's execution plan
https://my.oschina.net/zimingforever/blog/60233
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Imposible where noticed after reading
http://blog.csdn.net/mydriverc2/article/details/37663935
There are instructions

Read some good articles about MySQL execution plan