一个小tips，twitter上看见的：

一句话：

select{x table_name}from{x information_schema.tables}

mysql> select{x table_name}from{x information_schema.tables};
+----------------------------------------------------+
| table_name                                         |
+----------------------------------------------------+
| CHARACTER_SETS                                     |
| COLLATIONS                                         |
| COLLATION_CHARACTER_SET_APPLICABILITY              |
| COLUMNS                                            |
| COLUMN_PRIVILEGES                                  |
| ENGINES                                            |
..........

https://twitter.com/Black2Fan/status/564746640138182656

http://dev.mysql.com/doc/refman/5.6/en/date-and-time-literals.html#date-and-time-standard-sql-literals

http://dev.mysql.com/doc/refman/5.6/en/join.html#idm140714470997024