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_createTable
ON SCHEDULE EVERY 1 DAY
STARTS '2016-11-24 00:00:00' ON COMPLETION PRESERVE ENABLE
DO
CALL pro_createTable();

注：
#创建存储过程（动态表名）

CREATE PROCEDURE pro_createTable()
BEGIN
DECLARE 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=InnoDB
DEFAULT CHARACTER SET=utf8 COLLATE=utf8_general_ci
AUTO_INCREMENT=1
ROW_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

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