Use BINARY when designing tables
CREATE TABLE user_info ( login_name VARCHAR(20) BINARY );
Automatic case sensitivity when querying
Case sensitivity when querying
SELECT `name`,login_name FROM user_info WHERE BINARY login_name='liangningning';(有结果)
SELECT `name`,login_name FROM user_info WHERE BINARY login_name='Liangningning';(无结果)
user_info table