mysql 通过事件定时为数据库创建动态表名

#检测事件是否开启

show variables like 'event_scheduler';

#开启事件（最好在my.init设置，因为重启后还会变回默认值OFF）

set global event_scheduler = on;

#创建事件（从11月24号开始每天执行一次）

create EVENT eve_createTableON SCHEDULE EVERY 1 DAYSTARTS '2016-11-24 00:00:00' ON COMPLETION PRESERVE ENABLEDOCALL pro_createTable();

注：

1、ON COMPLETION PRESERVE ENABLE 是创建此事件即开始自动执行

2、SCHEDULE EVERY 1 DAY STARTS '2016-11-24 00:00:00' 从指定时间开始每天执行一次


#创建存储过程（动态表名）

CREATE PROCEDURE pro_createTable()BEGINDECLARE str VARCHAR(20000);set str= CONCAT('CREATE TABLE member_network_',DATE_FORMAT(now(),'%Y%m%d'),'(`id`  bigint(20) NOT NULL AUTO_INCREMENT ,`member_id`  bigint(20) NULL DEFAULT NULL ,`host_ip`  varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`serv_crc`  varchar(2000) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL ,`app_crc`  varchar(200) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`sync_time`  timestamp NULL DEFAULT NULL ,`online_time`  datetime NULL DEFAULT NULL ,`type`  varchar(500) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`up_stream_flux`  varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`down_stream_flux`  varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`total_stream_flux`  varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`line_no`  varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`url`  text CHARACTER SET utf8 COLLATE utf8_general_ci NULL ,`action`  varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`sev_port`  varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`sor_port`  varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`protocol`  varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`regionCode`  varchar(500) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,`memo`  varchar(500) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`policy`  varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`dns`  varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`name`  varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,`idcard`  varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,`client_name`  varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,PRIMARY KEY (`id`),INDEX `dept_type` (`regionCode`(255), `serv_crc`(255), `online_time`, `name`, `type`(255)) USING BTREE )ENGINE=InnoDBDEFAULT CHARACTER SET=utf8 COLLATE=utf8_general_ciAUTO_INCREMENT=1ROW_FORMAT=COMPACT');SET @sqlstr=str;PREPARE stmt from @sqlstr;EXECUTE stmt;deallocate prepare stmt;END;

执行时报错，因为CONCAT拼接超过最大值；
#sql语句查看该参数，修改并重启mysql

show VARIABLES like '%max_allowed_packet%';set global max_allowed_packet = 25600

mysql的前天、今天、后天

#2016-12-09DATE_FORMAT(date_sub(curdate(),interval 1 day),'%Y%m%d')#2016-12-10DATE_FORMAT(date_sub(curdate(),interval 0 day),'%Y%m%d')#2016-12-11DATE_FORMAT(date_sub(curdate(),interval -1 day),'%Y%m%d')