INSERT INTO runwa(rshottime,rmoney,renamecount) VALUES (CURDATE(),(select SUM(MONEY) from income where CREATESHOTTIME = CURDATE()),(select count(distinct hostname) from income where CREATESHOTTIME = CURDATE()));
1.查询某张表 一个字段的总和。（select SUM(MONEY) from income）
2.MYSQL里当天的时间（CURDATE()）
3.查询某张表某个字段不同的值的数量。（select count(distinct hostname) from income）