查看系统帮助
help contents
代码如下 | 复制代码 |
mysql> help contents; You askedforhelp about help category:"Contents" Formoreinformation,type'help categories: Account Management Administration Compound Statements Data Definition Data Manipulation Data Types Functions Functions and ModifiersforUse with GROUP BY Geographic Features Help Metadata Language Structure Plugins Procedures Storage Engines Table Maintenance Transactions User-Defined Functions Utility |
帮助文档的目录列表
查看数据类型
help data type
代码如下 | 复制代码 |
mysql> help data types; You askedforhelp about help category:"Data Types" Formoreinformation,type'help topics: AUTO_INCREMENT BIGINT BINARY BIT BLOB BLOB DATA TYPE BOOLEAN CHAR CHAR BYTE DATE DATETIME DEC DECIMAL DOUBLE DOUBLE PRECISION ENUM FLOAT INT INTEGER LONGBLOB LONGTEXT MEDIUMBLOB MEDIUMINT MEDIUMTEXT SET DATA TYPE SMALLINT TEXT TIME TIMESTAMP TINYBLOB TINYINT TINYTEXT VARBINARY VARCHAR YEAR DATA TYPE |
查看整数
代码如下 | 复制代码 |
mysql> help int; Name:'INT' Description: INT[(M)] [UNSIGNED] [ZEROFILL] A normal-size integer. The signed range is -2147483648 to 2147483647. The unsigned range is 0 to 4294967295. URL: http://dev.mysql.com/doc/refman/5.7/en/numeric-type-overview.html mysql> help tinyint; Name:'TINYINT' Description: TINYINT[(M)] [UNSIGNED] [ZEROFILL] A very small integer. The signed range is -128 to 127. The unsigned range is 0 to 255. URL: http://dev.mysql.com/doc/refman/5.7/en/numeric-type-overview.html |