create database db1;
create user user_1@localhost;
create user USER_1@localhost;
GRANT CREATE ON db1.* to user_1@localhost;
GRANT SELECT ON db1.* to USER_1@localhost;
connect  con1,localhost,user_1,,db1;
CREATE TABLE t1(f1 int);
SELECT * FROM t1;
ERROR 42000: SELECT command denied to user 'user_1'@'localhost' for table `db1`.`t1`
connect  con2,localhost,USER_1,,db1;
SELECT * FROM t1;
f1
CREATE TABLE t2(f1 int);
ERROR 42000: CREATE command denied to user 'USER_1'@'localhost' for table `db1`.`t2`
connection default;
disconnect con1;
disconnect con2;
REVOKE ALL PRIVILEGES, GRANT OPTION FROM user_1@localhost;
REVOKE ALL PRIVILEGES, GRANT OPTION FROM USER_1@localhost;
DROP USER user_1@localhost;
DROP USER USER_1@localhost;
DROP DATABASE db1;
use test;