mysql limit 用法

LIMIT 子句可以被用於強制 SELECT 語句返回指定的記錄數。LIMIT 接受一個或兩個數字參數。參數必須是一個整數常量。如果給定兩個參數，第一個參數指定第一個返回記錄行的偏移量，第二個參數指定返回記錄行的最大數目。初始記錄行的偏移量是 0(而不是 1)： 為了與 PostgreSQL 兼容，MySQL 也支持句法： LIMIT # OFFSET #。

 

mysql> SELECT * FROM table LIMIT 5,10; // 檢索記錄行 6-15   
  
//為了檢索從某一個偏移量到記錄集的結束所有的記錄行，可以指定第二個參數為 -1：    
mysql> SELECT * FROM table LIMIT 95,-1; // 檢索記錄行 96-last.   
  
//如果只給定一個參數，它表示返回最大的記錄行數目：    
mysql> SELECT * FROM table LIMIT 5; //檢索前 5 個記錄行   
  
//換句話說，LIMIT n 等價於 LIMIT 0,n。  

轉載自 https://www.cnblogs.com/cai170221/p/7122289.html

取得薪水最高的前五名員工
select * from emp order by sal desc limit 0,5;
+-------+-------+-----------+------+------------+---------+------+--------+
| EMPNO | ENAME | JOB       | MGR  | HIREDATE   | SAL     | COMM | DEPTNO |
+-------+-------+-----------+------+------------+---------+------+--------+
|  7839 | KING  | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL |     10 |
|  7788 | SCOTT | ANALYST   | 7566 | 1987-04-19 | 3000.00 | NULL |     20 |
|  7902 | FORD  | ANALYST   | 7566 | 1981-12-03 | 3000.00 | NULL |     20 |
|  7566 | JONES | MANAGER   | 7839 | 1981-04-02 | 2975.00 | NULL |     20 |
|  7698 | BLAKE | MANAGER   | 7839 | 1981-05-01 | 2850.00 | NULL |     30 |
+-------+-------+-----------+------+------------+---------+------+--------+

10.取得薪水最高的第六到第十名員工

select * from emp order by sal desc limit 5,5;
+-------+--------+----------+------+------------+---------+---------+--------+
| EMPNO | ENAME  | JOB      | MGR  | HIREDATE   | SAL     | COMM    | DEPTNO |
+-------+--------+----------+------+------------+---------+---------+--------+
|  7782 | CLARK  | MANAGER  | 7839 | 1981-06-09 | 2450.00 |    NULL |     10 |
|  7499 | ALLEN  | SALESMAN | 7698 | 1981-02-20 | 1600.00 |  300.00 |     30 |
|  7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 |    0.00 |     30 |
|  7934 | MILLER | CLERK    | 7782 | 1982-01-23 | 1300.00 |    NULL |     10 |
|  7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 |     30 |
+-------+--------+----------+------+------------+---------+---------+--------+

11.取得最后入職的5名員工
select * from emp order by hiredate desc limit 5;
+-------+--------+---------+------+------------+---------+------+--------+
| EMPNO | ENAME  | JOB     | MGR  | HIREDATE   | SAL     | COMM | DEPTNO |
+-------+--------+---------+------+------------+---------+------+--------+
|  7876 | ADAMS  | CLERK   | 7788 | 1987-05-23 | 1100.00 | NULL |     20 |
|  7788 | SCOTT  | ANALYST | 7566 | 1987-04-19 | 3000.00 | NULL |     20 |
|  7934 | MILLER | CLERK   | 7782 | 1982-01-23 | 1300.00 | NULL |     10 |
|  7902 | FORD   | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL |     20 |
|  7900 | JAMES  | CLERK   | 7698 | 1981-12-03 |  950.00 | NULL |     30 |
+-------+--------+---------+------+------------+---------+------+--------+