Quest Software, a global systems management, data protection and security software provider, completed the acquisition of erwin, a data governance company, from private equity firm Parallax Capital Partners. Financial terms were not disclosed. "Data-centric projects are rapidly accelerating across the enterprise. Together, Quest and erwin will continue to deliver database tools aimed at helping companies know their data, alleviating concerns about where and how their data is used," Patrick Nichols, Quest Software CEO.