How Can I Easily Migrate My SQLite3 Database to MySQL?

Quick and Easy Migration from SQLite3 to MySQL

If you seek a straightforward approach to migrate your SQLite3 database to MySQL, you're not alone. Attempting to manually convert data often leads to uncertainty about the correctness of the imported data. While there is no established library for this specific conversion, we can provide guidance based on the differences between the two file formats.

Syntax Differences

• SQLite3 employs "BEGIN TRANSACTION" and "COMMIT," which are omitted in MySQL.
• MySQL requires double quotes instead of single quotes in schema definitions.
• MySQL uses single quotes for strings in "INSERT INTO" clauses, unlike SQLite3's double quotes.
• Escaping strings differs between the two systems.
• MySQL utilizes 1 and 0 for booleans, while SQLite3 uses 't' and 'f.'
• Auto-increment functionality is named "AUTOINCREMENT" in SQLite3 and "AUTO_INCREMENT" in MySQL.

Perl Script for Data Migration

We offer a modified Perl script that addresses these differences and has been tested successfully on specific datasets. However, you may need to customize it to align with your specific data:

#! /usr/bin/perl

while ($line = <>){
    if (($line !~  /BEGIN TRANSACTION/) &amp;&amp; ($line !~ /COMMIT/) &amp;&amp; ($line !~ /sqlite_sequence/) &amp;&amp; ($line !~ /CREATE UNIQUE INDEX/)){
        
        if ($line =~ /CREATE TABLE \&quot;([a-z_]*)\&quot;(.*)/i){
            $name = ;
            $sub = ;
            $sub =~ s/\&quot;//g;
            $line = &quot;DROP TABLE IF EXISTS $name;\nCREATE TABLE IF NOT EXISTS $name$sub\n&quot;;
        }
        elsif ($line =~ /INSERT INTO \&quot;([a-z_]*)\&quot;(.*)/i){
            $line = &quot;INSERT INTO \n&quot;;
            $line =~ s/\&quot;/\\&quot;/g;
            $line =~ s/\&quot;/\'/g;
        }else{
            $line =~ s/\'\'/\\'/g;
        }
        $line =~ s/([^\'])\'t\'(.)/THIS_IS_TRUE/g;
        $line =~ s/THIS_IS_TRUE/1/g;
        $line =~ s/([^\'])\'f\'(.)/THIS_IS_FALSE/g;
        $line =~ s/THIS_IS_FALSE/0/g;
        $line =~ s/AUTOINCREMENT/AUTO_INCREMENT/g;
        print $line;
    }
}

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