Exhibit 5.1

[ORACLE LETTERHEAD]

November 17, 2009

Oracle Corporation

500 Oracle Parkway

Redwood City, California 94065

Ladies and Gentlemen:

I am a Vice President, Associate General Counsel and Assistant Secretary of Oracle Corporation (the “Company”), and I offer this opinion in connection with the Registration Statement on Form S-8 (the “Registration Statement”) to be filed with the Securities and Exchange Commission on or about November 17, 2009, in connection with the registration under the Securities Act of 1933, as amended, of 1,024,236 shares of the Common Stock of the Company, par value $0.01 (the “Shares”), issuable pursuant to equity awards assumed by the Company pursuant to the terms of the Agreement and Plan of Merger dated as of July 22, 2009 (the “Merger Agreement”), by and among the Company, Monet Acquisition Corporation, GoldenGate Software Inc. (“GoldenGate”) and certain other parties thereto. Pursuant to the Merger Agreement, the Company assumed outstanding equity awards of GoldenGate under the GoldenGate Software, Inc. 2002 Equity Incentive Plan (as amended, the “Plan”).

I have examined such documents and such matters of fact and law as I have deemed necessary to examine relating to the issuance of the Shares. It is my opinion that the Shares, when delivered pursuant to the terms of the Plan, will be validly issued, fully paid and nonassessable.

I consent to the use of this opinion as an exhibit to the Registration Statement and further consent to all references to myself in the Registration Statement and any amendments thereto.

This opinion is solely for your benefit and may not be relied upon by any other person without my prior written consent.

Sincerely,

/s/ Brady Mickelsen

Brady Mickelsen

Vice President, Associate General Counsel & Assistant Secretary