What are the principal tools and technologies for accessing information from databases? How do these tools and technologies provide information to improve business performance and decision making? Solution There are a wide variety of database tools and techniques are available now-a-days which will improve the database access very much. A few of the tools are like: - Data warehouses support multidimensional data analysis, also known as online analytical processing (OLAP). - SQL query brower which will help to explore the database using queries. - Visualizing tools which will help us to get a pictorial representation of database schema, with all the table related stuffs along with the constraints like primary keys and secondary keys .