如何在MySQL LIKE子句中使用用户变量？

Question

我正在尝试设置一些简单的SQL脚本来帮助进行一些短期数据库管理.因此,我正在设置变量,以便更容易重用这些脚本.

我遇到的问题特别是LIKE子句.

SET @email = 'test@test.com';

SELECT email from `user` WHERE email LIKE '%@email%';

所以我想让它根据变量中的电子邮件SET找到结果.如果我手动将电子邮件输入LIKE子句,则查询有效.

如何让LIKE子句与用户变量一起使用？

更新:@dems的答案适用于这个简单的情况,但我遇到了更复杂的查询问题.

SET @email = 'test@test.com';

SELECT project.projectno, project.projectname, login.username, 
CONCAT(login.firstname, ' ', login.lastname), projectuser.title 
FROM projectuser 
INNER JOIN login ON projectuser.uid = login.uid 
LEFT JOIN project ON projectuser.pid = project.pid
WHERE login.username LIKE CONCAT ('%', @email, '%')

给我错误"功能mydb.CONCAT不存在"

查询在没有CONCAT()的情况下工作:

SET @email = 'test@test.com';

SELECT project.projectno, project.projectname, login.username, 
CONCAT(login.firstname, ' ', login.lastname), projectuser.title 
FROM projectuser 
INNER JOIN login ON projectuser.uid = login.uid 
LEFT JOIN project ON projectuser.pid = project.pid
WHERE login.username LIKE @email

Answer 1

SET @email = 'test@test.com';

SELECT email from `user` WHERE email LIKE CONCAT('%', @email, '%');