I would like to be able to use a database link from an Oracle 10g database to a SQL Azure database.

Will Oracle Heterogeneous Services support this?

I can see various articles relating to connecting to SQL Azure via ODBC, so does this mean that it will be possible to do it using Oracle HS, or am I oversimplifying things?

2 Answers 2


If there is an ODBC driver to connect to it, then the Oracle Transparent Gateway for ODBC should work just fine.


Since the IP of a SQL Azure server may change over time then the IP address of a SQL Azure server should not be used to create a DB Link.

Hope this helps.


Alberto Morillo

  • 1
    Of course, it's a bad idea to use the ip address in any database link, SQL Azure or not. The IP of any server is subject to change. Not as often as a workstation with a DHCP address, but still is possible whenever the net admin deems necessary. Use the server name and let DNS sort it out.
    – EdStevens
    Commented Jul 4, 2017 at 23:13
  • Azure SQL uses SNI, IPs changing is the least of your problems when not using hostnames (There are 1-3 fixed IPs per region....) Commented Aug 21, 2019 at 15:53

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