Identify 3 significant similarities and 3 significant differ

Identify 3 significant similarities and 3 significant differences between the Data Base Management Systems MySQL, MSSQL and Oracle
here is some of what I have.
sql server supports xml, mysql doesn\'t support xml
sql server provides column level security. Mysql only provides table level security.
sql server provides certificate, data security is verified by third party. Mysql does not provide certificate.

I need more of Oracle answers that compare to MySQL, MSSQL

Solution

All these databases are based on one language i.e. SQL or Structured Query Language, which is just a ANSI standard, and is used as a base with most Database languages, like Microsoft SQL Server, Oracle, MySQL have used this as a base and extended/enhanced in their database systems.

First let\'s discuss similarities between these three:

Now let\'s come to the differences: