将字符串存储在变量中并连接它们以在MYSQL的单个列中显示它们
为此，请在MySQL中使用CONCAT_WS()。让我们首先创建一个-
create table DemoTable1433 -> ( -> ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> ClientFirstName varchar(20), -> ClientLastName varchar(20) -> );
使用insert在表中插入一些记录-
insert into DemoTable1433(ClientFirstName,ClientLastName) values('David','Miller');使用选择显示表中的所有记录-
select * from DemoTable1433;
这将产生以下输出-
+----------+-----------------+----------------+ | ClientId | ClientFirstName | ClientLastName | +----------+-----------------+----------------+ | 1 | David | Miller | +----------+-----------------+----------------+ 1 row in set (0.00 sec)
以下是将字符串存储在变量中并将其连接的查询-
set @concat_variable:=(select concat_ws('-',ClientFirstName,ClientLastName) from DemoTable1433);select @concat_variable;
这将产生以下输出-
+------------------+ | @concat_variable | +------------------+ | David-Miller | +------------------+ 1 row in set (0.00 sec)