Solution to rollback of MySQL database by mistake deletion

One careless time , It was used delete from xxx Deleted several important data , I found a lot of ways on the Internet , But they are scattered , We intend to record the process of data retrieval .
It is roughly divided into the following steps

1、 see binlog Open or not

# log_bin yes ON, It means that it is opened OFF It's off , The following operations , Only for ON Effective when .show variables like 'log_bin';

2、 find binlog file name

show master logs;

Run the above code , Here's the picture TS1-bin.000009 Is the file name we are looking for

3、 see binlog Log location

show variables like '%datadir%';

4、 According to the position obtained above , Go find TS1-bin.000009 file

5、 Enter into mysql Installation directory bin Under the table of contents , Execute the following command to start from... According to the time range of accidental deletion TS1-bin.000009 File export to sql file

mysqlbinlog --base64-output=decode-rows -v --database= Database name --start-datetime="2022-06-29 15:35:00" --stop-datetime="2022-06-29 15:45:00" C:/Users/Administrator/Desktop/TS1-bin.000009 > C:/Users/Administrator/Desktop/mysqllog.sql

Here I put TS1-bin.000009 The file is copied to the desktop , Because there are spaces in the original storage path of the file , Causes command execution to fail , Can't find the path .
obtain mysqllog.sql After the document , You can open it in Notepad , Search for DELETE keyword , Find the record to delete data

6、 take DELETE The sentence is transformed into INSERT sentence , stay windows Next use vbs To achieve , Copy and save the following code as :deleteToinsert.vbs file （ Must be .vbs Format file ） And mysqllog.sql In the same directory , And then double click , Will generate mysqllogOK.sql The document is what we want INSERT sentence

'========================== ' use VBS Realization MYSQL binglog DELETE turn INSERT '========================== function replaceregex(patern,str,tagstr)     dim regex,matches     set regex=new regExp     regex.pattern=patern     regex.IgnoreCase=true     regex.global=true     matches=regex.replace(str,tagstr)     replaceregex=matches end function'======Mysql binlog DELETE turn INSERT================'VBS open the text file Set oldStream = CreateObject("ADODB.Stream")oldStream.CharSet = "utf-8"oldStream.OpenoldStream.LoadFromFile("mysqllog.sql") 'binLog Generated DELETE Original log file oldText = oldStream.ReadText()    newText=replace(oldText,"### DELETE FROM", ";INSERT INTO")    newText=replace(newText,"### WHERE", "SELECT")    newText=replace(newText,"###", "")    newText=replace(newText,"@1=", "")    newText=replaceregex("\@[1-9]=",newText, ",")    newText=replaceregex("\@[1-9][0-9]=",newText, ",")oldStream.Close'VBS Save the file Set newStream = CreateObject("ADODB.Stream")newStream.Type = 2 'Specify stream type - we want To save text/string data.newStream.Charset = "utf-8" 'Specify charset For the source text data.newStream.Open 'Open the stream And write binary data To the objectnewStream.WriteText newTextnewStream.SaveToFile "mysqllogOK.sql", 2 'DELETE Turn into INSERT Later new SQL file name newStream.Close

7、 Get the corresponding INSERT Execute after statement .

Reference article

https://blog.csdn.net/qq_36602951/article/details/120729047
https://juejin.cn/post/7028955574242902023

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