MySQL中是否有CONCAT()的替代方法？
是的，替代方法是CONCAT_WS()。让我们首先创建一个表-
create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(100) );
示例
使用插入命令在表中插入一些记录-
insert into DemoTable(StudentName) values('Chris');
insert into DemoTable(StudentName) values('Robert');
insert into DemoTable(StudentName) values('Bob');使用select语句显示表中的所有记录-
select *from DemoTable;
输出结果
+-----------+-------------+ | StudentId | StudentName | +-----------+-------------+ | 1 | Chris | | 2 | Robert | | 3 | Bob | +-----------+-------------+ 3 rows in set (0.00 sec)
让我们看看如何在MySQL中使用CONCAT()的替代方法-
select concat_ws(SPACE(2), 'Student Name is:',StudentName) from DemoTable;
输出结果
+-----------------------------------------------------+ | concat_ws(SPACE(2), 'Student Name is:',StudentName) | +-----------------------------------------------------+ | Student Name is: Chris | | Student Name is: Robert | | Student Name is: Bob | +-----------------------------------------------------+ 3 rows in set (0.04 sec)