MySQL视图原理与基本操作示例

CREATE VIEW view_test(qty,price,total) AS SELECT quantity,price,quantity*price FROM t;

CREATE VIEW stu_class(id,name,glass) AS SELECT student.s_id,student.name,stu_info.glass FROM student,stu_info WHERE student.s_id = stu_info.s_id;

SHOW TABLE STATUS LIKE '视图名';

SHOWCREATE VIEW 视图名

select * from information_schema.views;

CREATE OR REPLACE VIEW view_test AS SELECT * FROM t;

ALTER VIEW view_test SELECT name FROM t;

DROP VIEW IF EXISTS stu_glass

/*获取系统组织结构
 *包括用户名称、用户ID、所属店面名称、所属店面ID、创建时间...
 */
CREATE VIEW organizationTableView as select id,storename,regdate from v9_qd_account;

/*获取当天的Cpz安装数据（按用户分组汇总）
 *包括用户ID、Cpz汇总值...
 */
CREATE VIEW TodayCpzTableView as select storeid,storename,count(id)as total,sum(tui_num)as tui_num from v9_qd_dev where days = DATE_FORMAT(NOW(),'%Y%m%d') group by storeid;

/*获取当月每天的Cpz安装数据（按天、用户分组汇总）
 *包括日期（天）、用户ID、Cpz汇总值、CpzApp汇总值、重复Cpz汇总值...
 */
CREATE VIEW HistoryCurrentMonthDayView as select storeid,storename,count(id)as total,sum(tui_num)as tui_num,days from v9_qd_dev where days > DATE_FORMAT(NOW(),'%Y%m') group by storeid,days;

/*获取每月的Cpz安装数据（按月、用户分组汇总）
 *包括日期（天）、用户ID、Cpz汇总值、CpzApp汇总值、重复Cpz汇总值...
 */
CREATE VIEW HistoryMonthTableView as select storeid,storename,count(id)as total,sum(tui_num)as tui_num, DATE_FORMAT(FROM_UNIXTIME(installdate),'%Y%m') as months from v9_qd_dev group by storeid,months;

/*根据输入的IMEI获取Cpz安装数据（）
 *包括IMEI、账户ID、店面ID、安装时间、是否重复安装、安装app个数、手机型号
 */
CREATE VIEW QueryCpzDatumByIMEI as select storeid,storename,verify,tui_num,sn,idfa,imei,devms,installdate from v9_qd_dev;

//今天
DATE_FORMAT(NOW(),'%Y%m%d');