1.查看mysql帮助信息
C:\Users\zhangcunli>mysql --help
mysql Ver 14.14 Distrib 5.7.9, for Win64 (x86_64)
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights re...
查询Syntax: SELECT [* | DISTINCT | col_name | col_name as new_name ] FROM table WHERE condition GROUP BY {col_name} HAVING where_condition ORDER BY {col_name } [ASC | DESC] ...