Synchronize two databases schema in MySQL

Question

I was looking for a portable script or command line program that can synchronize two MySQL databases schema. I am not looking for a GUI based solution because that can\'t be aut

Answer 1

check this one is codeigniter database diff script generator

https://github.com/vaimeo/ci-database-diff-generator

Answer 2

I know it's an old question but it was the first result on google for what I was searching for (exact same thing as the initial question)

I found the answer still here but I don't remember the URL it's a script that started from:

mysqldump --skip-comments --skip-extended-insert -u root -p dbName1>file1.sql
mysqldump --skip-comments --skip-extended-insert -u root -p dbName2>file2.sql
diff file1.sql file2.sql

and ended up more like this

#!/bin/sh

echo "Usage: dbdiff [user1:pass1@dbname1] [user2:pass2@dbname2] [ignore_table1:ignore_table2...]"

dump () {
  up=${1%%@*}; user=${up%%:*}; pass=${up##*:}; dbname=${1##*@};
  mysqldump --opt --compact --skip-extended-insert -u $user -p$pass $dbname $table > $2
}

rm -f /tmp/db.diff

# Compare
up=${1%%@*}; user=${up%%:*}; pass=${up##*:}; dbname=${1##*@};
for table in `mysql -u $user -p$pass $dbname -N -e "show tables" --batch`; do
  if [ "`echo $3 | grep $table`" = "" ]; then
    echo "Comparing '$table'..."
    dump $1 /tmp/file1.sql
    dump $2 /tmp/file2.sql
    diff -up /tmp/file1.sql /tmp/file2.sql >> /tmp/db.diff
  else
    echo "Ignored '$table'..."
  fi
done
less /tmp/db.diff
rm -f /tmp/file1.sql /tmp/file2.sql

Answer 3

For a long-term, professional solution, you should keep an eye on Schemamatic (http://versabanq.com/products/schemamatic.php). This link shows a GUI app but all it does is manipulate a command-line software. In this page there is link to its google code site where the C# .Net version of Schemamatic can be found. Your perfect solution would be to add support for MySQL to Schemamatic. For SQL Server, it's perfect and does exactly what you mentioned.

Now, for a short-term solution I would suggest dumping the data you want with MySQL's command-line tools like: mysqldump -A -c -uroot -ppassword >bkpmysql.sql

And play with it, although it should take quite some time to achieve what you want. Schemamatic really seems to me your best choice. Let me know if you need any clarification when/if trying Schemamatic.

Answer 4

Have you considered using MySQL replication ?

Answer 5

SQLyog does that and it is awesome. We use it in production often.

Answer 6

You might want to look at some tools such as dbdeploy (this is a java or a .net version) and liquidbase and others.

Although most of these I think will apply sets of changes to a DB in a controlled manner. Don't know if they can reverse engineer from existing schemas and compare.

E.