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mysql误删除表内数据怎么办

发表于:2024-09-22 作者:千家信息网编辑
千家信息网最后更新 2024年09月22日,这篇文章主要介绍了mysql误删除表内数据怎么办,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。#添加数据insert into tes
千家信息网最后更新 2024年09月22日mysql误删除表内数据怎么办

这篇文章主要介绍了mysql误删除表内数据怎么办,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。

#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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