I just come to use database management system and have no experience with all the DBMS programme. For those expert who have experience all the three platform, your opinion on this is very much appreciated. Please guide and let me know the pros and cons.
I been doing my database in Excel and would like to continue in other platform despite of the size of my folder is going bigger and handling the calculation, analysis and graph is getting slower and slower.
You can use any of DBMS as you want. For SQL server and Oracle, these are proprietry dbms so You need to purchase them. For MySQl it is open source so you don't need to purchase.
For comparison between these
http://blogs.sun.com/GeorgeTrujillo/entry/oracle_versus_mysql
http://www.vesigo.com/SQLServer/DatabaseServerComparison.aspx
You may not need to make the jump from Excel to the Mysql/SQL Server/Oracle level.
One prime consideration is, will you have multiple users/sessions using the data at one time. If not, the whole concurrency/locking layers of these databases are unnecessary overhead and you should look into something like SQLite.
Another is backup/recovery. Are happy happy to have 'snapshots' of your data (eg hourly/daily/weekly) and revert back to them if you have a problem, or do you need to be able to restore every last change even if you've been physically beating the flames out on your server.