问题描述
您可以重复表达：
SELECT neededfield, CONCAT(firstname, ' ', lastname) as firstlast
FROM users
WHERE CONCAT(firstname, ' ', lastname) = "Bob Michael Jones"
或包装查询
SELECT * FROM (
SELECT neededfield, CONCAT(firstname, ' ', lastname) as firstlast
FROM users) base
WHERE firstLast = "Bob Michael Jones"
解决方法
我正在尝试将其编译。.我有一个带有firstname和lastname字段的表，并且我有一个字符串，例如“ Bob Jones”或“ Bob Michael Jones”等。
事实是，例如，我的名字有鲍勃，姓氏有迈克尔·琼斯
所以我想
SELECT neededfield,CONCAT(firstname,' ',lastname) as firstlast
FROM users
WHERE firstlast = "Bob Michael Jones"
但是它说未知列“ firstlast” ..有人可以帮助吗？