The ST_INFO master table has millions of rows that are updated very rarely. It has a STATE_CODE column that contains the value for 25 states. The table is frequently queried on the STATE_CODE column. Which type of index would you suggest to improve the query performance?()
The ST_INFO master table has millions of rows that are updated very rarely. It has a STATE_CODE column that contains the value for 25 states. The table is frequently queried on the STATE_CODE column. Which type of index would you suggest to improve the query performance?()
要查询st_info表中姓"王"且单名的学生情况,可用()命令。
在为student_db数据库的St_Info表录入数据时,常常需要一遍又一遍地输入“男”到学生“性别”列,以下()方法可以解决这个问题。