What if mysql deletes the data in the table by mistake?
This article mainly introduces the mysql mistakenly deleted table data how to do, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor with you to understand.
# add data
Insert into testdb1.student (id,name,class,score) value (arecronomy) value (arecronomy), (2) (2) (2) (3) (3) (3) (3) (3) (3) (4) (4) (4) (4) (4) (4) (4), (4) (4), (4) (4), (4) (4), (4) (4) (4), (4) (4) (4), (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (
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)
# Delete data
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-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 sed where select execSQL.sql g' | sed's execSQL.sql = / / g' > execSQL.sql = / / g'>
Main points:
Sed's swap 4. 4. /\ 0 match the full length of all characters after @ 4, replace, and add after the match. \ 0 represents the whole line
Sed's swap @ [1-3]. * /\ 0Grample G' matches @ from 1 to 3, all characters after the match are all lengths, and a comma is added after the match. \ 0 represents the whole line.
Sed's / [^ @]\ (. *\) = / / g' replace the content that starts with @ and falls within =.
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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