1.檢視event是否開啟
show variables like '%sche%';set global event_scheduler =1;或
set global event_scheduler = on;
一.12點整執行accountall（）函式：
create event test
on schedule at timestamp '2019-07-02 10:10:00'
do call accountall(now());
create event e_test
on schedule at current_timestamp + interval 5 day
do truncatetable test.aaa;
create event e_test
on schedule every 1 day
do truncatetable test.aaa;
create event e_test
ons chedule every 1 day
ends current_timestamp+ interval 5 day
do truncatetable test.aaa;
create event e_test
on schedule every 1 day
starts current_timestamp+ interval 5 day
do truncatetable test.aaa;
create event stars
on schedule every 1 hour
starts '2019-07-03 12:00:00'
do call star_ranks();
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