摘要:
在游标循环中,使用使用select into 变量var时,再判断var isnull 或者length(var)=0时,跳出循环。解决方式:使用set var=(select id from table);然后再判断var isnull 或者length(var)=0 阅读全文
摘要:
redis提供了rate limit demo 如下所示:INCRkeyAvailable since 1.0.0.Time complexity:O(1)Increments the number stored atkeyby one. If the key does not exist, it ... 阅读全文