卡嘉mysql命令

HOW PROCESSLIST显示哪些线程正在运行

SELECT COUNT(*) from kajia_vehicle_entertimes;

 

服务站统计

SELECT COUNT(1) from kajia_ss_product_statistic WHERE START_TIME > '2017-12-20 20:00';

SELECT COUNT(1) from kajia_ss_overtime_statistic WHERE START_TIME > '2017-12-20 20:00';

SELECT COUNT(1) from kajia_vehicle_alarm_msg WHERE POS_TIME > '2017-12-20 20:00';

SELECT COUNT(1) from kajia_vehicle_entertimes;

 

TIME_TO_SEC 是把 时分秒转为 秒，并不会对年月日进行处理

UNIX_TIMESTAMP这个函数返回的是自1970年以来的秒数，所以时间计算用这个是靠谱的

 

一分钟内收到的数据

SELECT count(*) from kajia_position.device_position_his1712 dph where pos_time >='2017-12-29 20:22:00' and pos_time <='2017-12-29 20:23:00';

 

前100条最新数据

SELECT pos_time,RECIVED_TIME,send_kafka, CREATE_TIME,insert_time from kajia_position.device_position_his1712 dph order by pos_time desc limit 0,100;

 

查看数据库1,2的慢查询

select * from information_schema.processlist where state !='' ;