Matlab Reference Book and User Manual provides examples of use case scenarios. For example, a database may host an application and create a user without writing queries. Manual Implementations In order to create an application using the Hadoop Hadoop Database Manager tool in Hadoop Database Manager, developers must implement the following preprocessor macros: Hadoop DB Manager: Provide Hadoop-Hadoop-SQL backend; the schema of SQL connections; Hadoop-Hadoop-SQL backend: Use the Hadoop-Hadoop-SQL base database backend as the data layer, the relational database backend as the data layer, and the client the database is based on. The Hadoop-Hadoop-SQL Database Manager client: Use the Hadoop-Hadoop-SQL base database backend as the data layer, the relational database backend as the data layer, and the user interface as the view interface. The Hadoop-Hadoop-SQL Database Manager user interface: Use the Hadoop-Hadoop-SQL base database backend as the data layer, the relational database backend as the data layer, and the user interface as the view interface. The Hadoop-Hadoop-SQL Database Manager user interface: In the case of Hadoop-SQL, provide the Hadoop-Hadoop-SQL database with the current data layers: All the database database instances except the user-defined databases for example. The Hadoop-Hadoop-SQL Database Manager user interface includes the schema of database queries created using the Hadoop-Hadoop-SQL database backend. The Hadoop-Hadoop-SQL Database Manager user interface includes all of the schema and metadata for SQL queries created using the Hadoop-Hadoop-SQL database backend. In order for an Hadoop-DB Manager database to be created, the database schema and the database schema