mysql误删除表内数据怎么办

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#添加数据

insert into testdb1.student(id,name,class,score) value(a,'a',1,45),(2,'b',1,46),(3,'c',2,89),(4,'d',2,90),(5,'e',3,67),(6,'f',3,87),(7,'g',4,77),(8,'h',4,91);

mysql> select * from testdb1.student;

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

| id   | name | class | score |

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

|    1 | a    | 1     |    45 |

|    2 | b    | 1     |    46 |

|    3 | c    | 2     |    89 |

|    4 | d    | 2     |    90 |

|    5 | e    | 3     |    67 |

|    6 | f    | 3     |    87 |

|    7 | g    | 4     |    77 |

|    8 | h    | 4     |    91 |

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

8 rows in set (0.00 sec)

#删除数据

mysql> delete from testdb1.student;

Query OK, 8 rows affected (0.00 sec)

mysql> commit;

Query OK, 0 rows affected (0.00 sec)

mysql> show master status\G

*************************** 1. row ***************************

             File: ray-bin.000004

         Position: 5444

     Binlog_Do_DB:

Binlog_Ignore_DB:

Executed_Gtid_Set:

1 row in set (0.00 sec)

[root@localhost ~]# mysqlbinlog /data/3306/logs/ray-bin.000004 -v -v -S /data/3306/soket/mysql.sock --base64-output=decode-rows | sed -n '/### DELETE FROM `testdb1`.`student`/,/COMMIT/P' | sed -n 's\### \\p' | sed "s/\/\*.*\*\///g" | sed 's/`//g' > /tmp/1.txt

[root@localhost ~]# sed 's/DELETE FROM/insert into/g' /tmp/1.txt | sed 's/WHERE/select/g' | sed 's/@4.*/\0;/g' | sed 's/@[1-3].*/\0,/g' | sed 's/[^@]\(.*\)=//g' > execSQL.sql

要点：

     sed 's/@4.*/\0;/g'  把@4后面匹配所有字符所有长度，替换，在匹配的后面添加。\0代表整行;

     sed 's/@[1-3].*/\0,/g'    把@后面从1到3匹配，在匹配后面所有字符所有长度，在匹配项后面添加逗号。\0代表整行。

     sed 's/[^@]\(.*\)=//g'  把已@开头的到=以内的内容替换

mysql> source /root/execSQL.sql

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

mysql> commit;

Query OK, 0 rows affected (0.01 sec)

mysql> select * from testdb1.student;

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

| id   | name | class | score |

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

|    1 | a    | 1     |    45 |

|    2 | b    | 1     |    46 |

|    3 | c    | 2     |    89 |

|    4 | d    | 2     |    90 |

|    5 | e    | 3     |    67 |

|    6 | f    | 3     |    87 |

|    7 | g    | 4     |    77 |

|    8 | h    | 4     |    91 |

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

8 rows in set (0.00 sec)

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