Php MySql从一个id获取两个值
下面有一个sql查询,请注意从Php MySql从一个id获取两个值,php,mysql,Php,Mysql,下面有一个sql查询,请注意从表1id返回的字段receiver 我的问题是如何在receiver位置获取接收者FirstName和LastName SELECT DISTINCT FirstName, LastName, table_2.status, (select FirstName, LastName from table_1 where table_1.id = table_2.receiver) as receiver FROM table_1
表1
id返回的字段receiver
我的问题是如何在receiver
位置获取接收者FirstName
和LastName
SELECT DISTINCT
FirstName,
LastName,
table_2.status,
(select FirstName, LastName from table_1 where table_1.id = table_2.receiver) as receiver
FROM table_1
INNER JOIN
table_2 on table_1.key_2 = CONCAT('OFFLINE-', table_2.id)
ORDER BY FirstName, LastName
我在我的SQL中添加了一个子查询,但这给了我一个语法错误:(这是有效的:)
这是有效的:)
您可以使用别名而不是子查询:
SELECT DISTINCT
t2.FirstName,
t2.LastName,
t2.status,
CONCAT(t1.FirstName,' ', t1.LastName) as receiver
FROM table_1 t1
INNER JOIN
table_2 t2 on t1.key_2 = CONCAT('OFFLINE-', t2.id)
ORDER BY t1.FirstName, t1.LastName
您可以使用别名而不是子查询:
SELECT DISTINCT
t2.FirstName,
t2.LastName,
t2.status,
CONCAT(t1.FirstName,' ', t1.LastName) as receiver
FROM table_1 t1
INNER JOIN
table_2 t2 on t1.key_2 = CONCAT('OFFLINE-', t2.id)
ORDER BY t1.FirstName, t1.LastName
接收器数据存储在哪里,哪个表?你能从表格和预期结果中添加样本数据吗?你所说的“接收点”是什么意思?是否要更改输出列的顺序?接收器数据存储在表1中。例如,每个数据行都有一个id和一个接收器,接收器是表1中其他人的id。我希望得到接收器的名字和姓氏。接收器数据存储在哪里,哪个表?你能从表格和预期结果中添加样本数据吗?你所说的“接收点”是什么意思?是否要更改输出列的顺序?接收器数据存储在表1中。例如,每个数据行都有一个id和一个接收器,接收器是表1中其他人的id。我想知道收信人的名字和姓氏。
SELECT DISTINCT
t2.FirstName,
t2.LastName,
t2.status,
CONCAT(t1.FirstName,' ', t1.LastName) as receiver
FROM table_1 t1
INNER JOIN
table_2 t2 on t1.key_2 = CONCAT('OFFLINE-', t2.id)
ORDER BY t1.FirstName, t1.LastName