1、打开MySqlWorkbench登录页面,输入密码,点击登录按钮

3、排序数据记录查询,通过order by关键字,sql语句的结构如下:select filed from table_name where condition order by field [asc|desc];
4、举个例子:在db_librar鲻戟缒男y数据库中t_book表,按价格从高到低进行排序,sql语句如下:use db_library;select * from t_book order by book_price desc;点击闪电标志的按钮,执行sql语句,显示执行成功。

6、分组查询通过group by关键字,sql语句的结构如下:select function(col_name1) from table_name group by col_name2;
7、举个例子:在db_librar鲻戟缒男y数据库中t_book表,按作者进行排序,每位作者发表了几本书,sql语句如下:use db_library;sele艘早祓胂ct book_author,count(*) from t_book group by(book_author);点击闪电标志的按钮,执行sql语句,显示执行成功。

10、然后查询出前三行的数据,sql语句如下:use db_library;select * from t_book limit 3;点击闪电标志的按钮,执行sql语句,显示执行成功。
