mysql ，limit 的使用

//offset参数指定要返回的第一行的偏移量。第一行的偏移量为0，第二行的偏移量为1。count指定要返回的最大行数。
LIMIT offset,count;

mysql> select * from table1;
+----------+------------+-----+---------------------+
| name_new | transactor | pid | order_date          |
+----------+------------+-----+---------------------+
| 1hahha   | 1xiaohong  |   1 | 2019-08-04 20:45:47 |
| 2hahha   | 2xiaohong  |   2 | 2019-08-04 20:45:57 |
| 3hahha   | 3xiaohong  |   3 | 2019-08-04 20:46:02 |
| 4hahha   | 4xiaohong  |   4 | 2019-08-04 20:46:05 |
| 3hahha   | bob        |   5 | 2019-08-04 20:46:08 |
| 3hahha   | lee        |   6 | 2019-08-04 20:46:12 |
| 3hahha   | lee        |   7 | 2019-08-04 21:56:01 |
| 3hahha   | lee        |   8 | 2019-08-04 21:56:10 |
| 3hahha   | bob        |   9 | 2019-08-04 21:56:18 |
| 3hahha   | bob        |  10 | 2019-08-04 21:56:26 |
+----------+------------+-----+---------------------+
10 rows in set (0.00 sec)



//前7条数据
mysql> select * from table1 limit 7;
+----------+------------+-----+---------------------+
| name_new | transactor | pid | order_date          |
+----------+------------+-----+---------------------+
| 1hahha   | 1xiaohong  |   1 | 2019-08-04 20:45:47 |
| 2hahha   | 2xiaohong  |   2 | 2019-08-04 20:45:57 |
| 3hahha   | 3xiaohong  |   3 | 2019-08-04 20:46:02 |
| 4hahha   | 4xiaohong  |   4 | 2019-08-04 20:46:05 |
| 3hahha   | bob        |   5 | 2019-08-04 20:46:08 |
| 3hahha   | lee        |   6 | 2019-08-04 20:46:12 |
| 3hahha   | lee        |   7 | 2019-08-04 21:56:01 |
+----------+------------+-----+---------------------+
7 rows in set (0.00 sec)



//从第2行开始，显示7行
mysql> select * from table1 limit 1,7;
+----------+------------+-----+---------------------+
| name_new | transactor | pid | order_date          |
+----------+------------+-----+---------------------+
| 2hahha   | 2xiaohong  |   2 | 2019-08-04 20:45:57 |
| 3hahha   | 3xiaohong  |   3 | 2019-08-04 20:46:02 |
| 4hahha   | 4xiaohong  |   4 | 2019-08-04 20:46:05 |
| 3hahha   | bob        |   5 | 2019-08-04 20:46:08 |
| 3hahha   | lee        |   6 | 2019-08-04 20:46:12 |
| 3hahha   | lee        |   7 | 2019-08-04 21:56:01 |
| 3hahha   | lee        |   8 | 2019-08-04 21:56:10 |
+----------+------------+-----+---------------------+
7 rows in set (0.00 sec)