使用MySQL SELECT语句时，在每个值的末尾添加一个百分号（％）
要在末尾添加百分号，请使用CONCAT()函数。让我们首先创建一个表-
mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(100), StudentScore int );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable(StudentName,StudentScore) values('John',65);
mysql> insert into DemoTable(StudentName,StudentScore) values('Chris',98);
mysql> insert into DemoTable(StudentName,StudentScore) values('Robert',91);使用select语句显示表中的所有记录-
mysql> select *from DemoTable;
这将产生以下输出-
+-----------+-------------+--------------+ | StudentId | StudentName | StudentScore | +-----------+-------------+--------------+ | 1 | John | 65 | | 2 | Chris | 98 | | 3 | Robert | 91 | +-----------+-------------+--------------+ 3 rows in set (0.00 sec)
以下是使用MySQLSELECT语句在末尾向每个值添加百分号（％）的查询-
mysql> select StudentId,StudentName,concat(StudentScore,'%') AS StudentScore from DemoTable;
这将产生以下输出-
+-----------+-------------+--------------+ | StudentId | StudentName | StudentScore | +-----------+-------------+--------------+ | 1 | John | 65% | | 2 | Chris | 98% | | 3 | Robert | 91% | +-----------+-------------+--------------+ 3 rows in set (0.00 sec)