摘要:
1、show global variables like 'wait_timeout' 2、show VARIABLES like "%slow%" 3、set global long_query_time = 0.01 4、set global slow_query_log = ON 5、tmp_ 阅读全文
摘要:
1、一种为使用eval()函数 var jsonObj=eval("("+data+")"); 2、使用Function对象来进行返回解析 var jsonstr='{"name":"CJ","age":18}'; var jsonObj =(new Function("","return "+js 阅读全文
摘要:
1、DELETE a.*, aa.* FROM student a, person aa WHERE a.id = aa.city_id AND a.name = '' 2、DELETE a.*, aa.* FROM student a inner join person aa on a.id = 阅读全文