记录        [3,+2)           从0编号,第三行记录序号为 2

limit offset

 
子查询

 子查询查出第三行记录的dept_no

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CREATE TABLE `departments` (
  `dept_no` char(4) NOT NULL,
  `dept_name` varchar(40) NOT NULL,
  PRIMARY KEY (`dept_no`),
  UNIQUE KEY `dept_name` (`dept_name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
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LOCK TABLES `departments` WRITE;
/*!40000 ALTER TABLE `departments` DISABLE KEYS */;
INSERT INTO `departments` VALUES ('d009','Customer Service'),('d005','Development'),('d002','Finance'),('d003','Human Resources'),('d001','Marketing'),('d004','Production'),('d006','Quality Management'),('d008','Research'),('d007','Sales');
/*!40000 ALTER TABLE `departments` ENABLE KEYS */;
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-- Dump completed on 2021-05-18  9:50:05

SELECT
    * 
FROM
    departments t1
    JOIN ( SELECT dept_no FROM departments ORDER BY dept_no ASC LIMIT 2, 1 ) t2 
WHERE
    t1.dept_no >= t2.dept_no 
ORDER BY
    t1.dept_no ASC 
    LIMIT 2

子查询在索引上完成