DatabaseResourcesPath[] gives the list of directories that are searched to find database resources.

DataSourceNames[] returns a list of the names of data sources made available through DatabaseResourcesPath.

JDBCDriverNames[] returns a list of the names of databases for which JDBC drivers are available through DatabaseResourcesPath.

JDBC[arg, ...] is an object that holds parameters for making a JDBC connection to a database.

SQLBeginTransaction[conn] initiates an SQL transaction.

SQLCommitTransaction[conn] commits an SQL transaction.

SQLConnections[] returns a list of the open SQLConnection objects.

SQLDataTypeNames[conn] returns the names of data types that can be stored in an SQL connection.

SQLDropTable[conn, table] drops a table in an SQL connection.

SQLExpr[expr] allows a Mathematica expression to be stored in a database.