MySQL database study notes (6) ---- MySQL multi-table query foreign keys, table joins, subqueries, indexes

Reprinted from: http://www.cnblogs.com/smyhvae/p/4042303.html
(1) Installation and configuration of MySQL 5.6.21 (setup version) 1
(2) ---- MySQL data type 28
(3) Basic SQL statement 31
(4) MySQL aggregate function, control flow function (including the introduction of navicat software) 42
(5) ---- MySQL string function, date and time function 51
(6) ---- MySQL multi-table query Foreign keys, table joins, subqueries, indexes 63