复合索引的创建删除
2019-10-11 本文已影响0人
hemingkung
create index index_workday_sysname on batch_monitor_log (workday, sysname);
drop index index_workday_sysname on batch_monitor_log ;
show index from batch_monitor_log ;
alter table t1 add index (`teacher`);
alter table t1 drop index (teacher)
