Question

当我包含WHERE LIKE时，MySql语句不返回任何结果。

声明：

SELECT aes_decrypt(SchoolName, 'MyString') as SchoolName from SchoolList Where aes_decrypt(SchoolName, 'MyString') LIKE '% Part of School Name Here%'

如果我删除了LIKE，就可以了

SELECT aes_decrypt(SchoolName, 'MyString') as SchoolName from SchoolList Where aes_decrypt(SchoolName, 'MyString') = 'School Name Here'

Answer 1

您需要将aes_decrypt的结果强制转换为char才能使用LIKE运算符：

SELECT aes_decrypt(SchoolName, 'MyString') as SchoolName 
from SchoolList 
Where cast(aes_decrypt(SchoolName, 'MyString') as CHAR) LIKE '% Part of School Name Here%'

请参见以下示例：https://www.db-fiddle.com/f/m1ynqMzVqSs5yTeTmrqUbP/1

MySql SELECT语句，其中LIKE不返回结果

1 个答案: