如何将MySQL查询的结果分配给变量？
使用@anyVariableName将查询结果分配给变量。让我们首先创建一个表-
mysql> create table DemoTable1864
(
Id int,
FirstName varchar(20),
LastName varchar(20)
);使用插入命令在表中插入一些记录-
mysql> insert into DemoTable1864 values(101,'Chris','Brown'); mysql> insert into DemoTable1864 values(102,'David','Miller'); mysql> insert into DemoTable1864 values(103,'Adam','Smith'); mysql> insert into DemoTable1864 values(104,'John','Doe');
使用select语句显示表中的所有记录-
mysql> select * from DemoTable1864;
这将产生以下输出-
+------+-----------+----------+ | Id | FirstName | LastName | +------+-----------+----------+ | 101 | Chris | Brown | | 102 | David | Miller | | 103 | Adam | Smith | | 104 | John | Doe | +------+-----------+----------+ 4 rows in set (0.00 sec)
这是将查询结果分配给变量的查询-
mysql> select @fName:=FirstName,@lName:=LastName
from DemoTable1864
where Id=103;这将产生以下输出-
+-------------------+------------------+ | @fName:=FirstName | @lName:=LastName | +-------------------+------------------+ | Adam | Smith | +-------------------+------------------+ 1 row in set (0.00 sec)