The Grid is an emerging infrastructure that supports the discovery, access and use of distributed computational resources. Grid Computing has become another buzzword after Web 2.0. However, there are dozens of different definitions for Grid Computing and there seems to be no consensus on what a Grid is. In addition, Databases are heterogeneous, because databases are usually designed for specific applications. To solve this problem, Use of open grid service architecture (OGSA). In this paper, we study the structure of two types of OGSA architecture which is used for the integration of databases. The OGSA-DAI architecture is a middleware that classifies several requests and translates them in one single-request and send it to its services, and finally shares different Database. OGSA-DQP architecture is a developed model of OGSA-DAI that with breaking user request into several inquiries, it accelerates integration.