数据库作业
在linux系统下的MySQL
创建数据库
使用数据库
查询当前默认的数据库以及使用的编码方式校验规则
查询创建数据的语句
删除数据库
创建数据表
定义多个字段,用上所有数据类型
mysql> SHOW CREATE TABLE multi_tb;
+----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| multi_tb | CREATE TABLE `multi_tb` (
`company_name` char(8) DEFAULT NULL COMMENT '公司名称',
`introduce` varchar(100) DEFAULT NULL COMMENT '介绍',
`content1` tinytext COMMENT '公司员工名',
`content2` text COMMENT '内容1',
`content3` mediumtext COMMENT '内容2',
`content4` longtext COMMENT '内容3',
`picture1` blob COMMENT '图片1',
`picture2` mediumblob COMMENT '大图片',
`picture3` longblob COMMENT '视频',
`list` enum('X1','X2','X3') DEFAULT NULL COMMENT '选择列表',
`list1` set('Y1','Y2','Y3','Y4') DEFAULT NULL COMMENT '公司的职业',
`people1` tinyint DEFAULT NULL COMMENT '管理层人数',
`area` smallint DEFAULT NULL COMMENT '公司面积',
`gong_shu` mediumint DEFAULT NULL COMMENT '公司流动资金',
`money` int DEFAULT NULL COMMENT '投资资金',
`people2` bigint DEFAULT NULL COMMENT '公司员工编号',
`wages` float(8,3) DEFAULT NULL COMMENT '平均工资',
`wages_gong` double(10,2) DEFAULT NULL COMMENT '月营业额',
`wages_nian` decimal(11,2) DEFAULT NULL COMMENT '年营业额',
`date` date DEFAULT NULL COMMENT '日期',
`datetime` datetime DEFAULT NULL COMMENT '日期加时间',
`timestamp` timestamp NULL DEFAULT NULL COMMENT '时间戳',
`time` time DEFAULT NULL COMMENT '时间',
`year` year DEFAULT NULL COMMENT '年'
) ENGINE=InnoDB DEFAULT CHARSET=gbk |
+----------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql>