MySQL datetime类型与时间、日期格式字符串大小比较的方法

CREATE TABLE
IF NOT EXISTS `user` (
   id INT NOT NULL PRIMARY KEY auto_increment COMMENT 'id',
   user_name VARCHAR (16) NULL COMMENT '用户名',
   real_name VARCHAR (10) NULL COMMENT '真实姓名',
   age INT UNSIGNED NULL COMMENT '年龄',
   create_time datetime NULL COMMENT '创建时间',
   create_by VARCHAR (16) NULL COMMENT '创建人',
   modify_time datetime NULL COMMENT '修改时间',
   modify_by VARCHAR (16) NULL COMMENT '修改人',
   deleted CHAR (1) DEFAULT 'F' NOT NULL COMMENT '删除标识：F-未删除,T-已删除'
)

select * from USER t where t.create_time > '2022-04-04';

select * from USER t where t.create_time < '2022-04-04';

select * from USER t where t.create_time > '2022-04-04 00:00:01';

select * from USER t where t.create_time < '2022-04-04 00:00:01';

select * from USER t where t.create_time BETWEEN '2022-04-04' and '2022-04-04'

SELECT
   *
FROM
   USER t
WHERE
   t.create_time BETWEEN '2022-04-04'
AND '2022-04-05'

SELECT
   *
FROM
   USER t
WHERE
   t.create_time BETWEEN '2022-04-04 00:00:00'
AND '2022-04-04 00:00:00'

SELECT
   *
FROM
   USER t
WHERE
   t.create_time BETWEEN '2022-04-04 00:00:00'
AND '2022-04-05 00:00:00'