1.表數(shù)據(jù)結(jié)構(gòu)

選擇mysql記錄上一條，下一條sql語句

SELECT * FROM user ORDER BY rank ASC

+----+------+---------+

| ID | rank | name |

+----+------+---------+

| 1 | 1 | admin1 |

| 2 | 2 | admin2 |

| 3 | 3 | admin3 |

| 4 | 4 | admin4 |

| 5 | 5 | admin5 |

| 6 | 6 | admin6 |

| 7 | 7 | admin7 |

| 8 | 8 | admin8 |

| 9 | 9 | admin9 |

| 10 | 10 | admin10 |

| 11 | 11 | admin11 |

| 12 | 12 | admin12 |

+----+------+---------+

2.選擇上一行

select * from user where id <3 or id=(SELECT MIN(id) from user) order by id desc limit 1

+----+------+--------+

| ID | rank | name |

+----+------+--------+

| 2 | 2 | admin2 |

+----+------+--------+

1 row in set (0.00 sec)

3.當(dāng)id=1時(shí)

mysql> select * from user where id <1 or id=(SELECT MIN(id) from user) order by id desc limit 1;

+----+------+--------+

| ID | rank | name |

+----+------+--------+

| 1 | 1 | admin1 |

+----+------+--------+

1 row in set (0.00 sec)

4.選擇下一行

mysql> select * from user where id > 3 OR ID=(SELECT MAX(ID) FROM user) ORDER BY id ASC LIMIT 1;

+----+------+--------+

| ID | rank | name |

+----+------+--------+

| 4 | 4 | admin4 |

+----+------+--------+

1 row in set (0.00 sec)

5.當(dāng)id為最大值時(shí)

mysql> select * from user where id > 12 OR ID=(SELECT MAX(ID) FROM user) ORDER BY id ASC LIMIT 1;

+----+------+---------+

| ID | rank | name |

+----+------+---------+

| 12 | 12 | admin12 |

+----+------+---------+

1 row in set (0.00 sec)

總結(jié)

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