A Decision Support System (DSS) is a computerized application or an information system that supports business decision more easily. Customer Relationship Management (CRM) is a strategy which a company uses to handle customer interactions. CRM mainly focuses on attracting, retaining, developing and identifying customers. For Successful CRM approach there the authors have various data mining algorithms. Here, they discuss some algorithms which are used to generating data mining process that are used to implement decision support system for customer relationship management. Using this approach provide an opportunity for organizations to improve their current marketing and CRM.