MySQL查询在单列中显示列名，姓氏？
为此，请使用CONCAT()MySQL中的方法。让我们首先创建一个表-
mysql> create table DemoTable ( FirstName varchar(50), LastName varchar(50) );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values('Chris','Brown');
mysql> insert into DemoTable values('David','Miller');
mysql> insert into DemoTable values('John','Doe');
mysql> insert into DemoTable values('Adam','Smith');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-
+-----------+----------+ | FirstName | LastName | +-----------+----------+ | Chris | Brown | | David | Miller | | John | Doe | | Adam | Smith | +-----------+----------+ 4 rows in set (0.00 sec)
以下是将名字和姓氏连接为全名的查询-
mysql> select concat(FirstName,' ',LastName) AS FullName from DemoTable;
这将产生以下输出-
+--------------+ | FullName | +--------------+ | Chris Brown | | David Miller | | John Doe | | Adam Smith | +--------------+ 4 rows in set (0.00 sec)