Search for jobs related to Er diagram online job portal or hire on the world's largest freelancing marketplace with 15m+ jobs. It's free to sign up and bid on jobs. Step 1: E-R Diagram Step 2: Converting the E-R Diagram into Tables a. Converting entity to table and attribute to columns USER U_id Primary Key Password Security_quest Passenger PNR Primary Key P_name Age Gender Seat_no. Vinnie moore discografia download. EPs and CD-singles from Vinnie Moore are also welcome to be added, as long as they are at least 4 songs in length. Please only submit official CD releases; no bootlegs or cassette-only or LP-only releases. Even if it is an obscure greatest-hits or live compilation CD, we want to add it to the site. Reserve_status U_id Foreign key references to U_id of User table. Status_id Foreign key references to Status_id of Train_Status Table. Train_id Foreign key references to Train_id of Train Table Train_Status Status_id Primary Key Wait_seat Avail_seat Booked_seat Train_id Foreign key references to Train_id of Train Table PNR Foreign key references to PNR of Passenger table. Train Train_id Primary Key T_name Train_type Avail_class Status_id Foreign key references to Status_id of Train_Status Table. Route Arr_time Depart_time Stop no. Station_id Foreign key references to Station_id of Station table. Train_id Foreign key references to Train_id of Train Table Station Station_id Primary Key Station_name Step 3: Mapping of Attributes a. Simple Attributes Simple attributes which cannot be divided into subparts. Example: Seat Number of passenger b. Composite Attributes Composite attributes which can be divided into subparts. Example: Passenger Name, Reservation status P_name First_Name Middle_Name Last_name Reserve_status Waiting Confirmed Step 4: Mapping of entity set a. Fast furious 7 mkv downloader download. Weak entity set For each weak entity type with owner entity, create a table and include all simple attributes of weak entity type as columns of table, including foreign key attributes as the primary key of the table that correspond to the owner entity type.(Owner entity is strong entity having own primary key.) Example: Route (Weak Entity) in Train (Owner entity). Step 5: Mapping of Relationships a. Foreign Key approach Passenger_Table U_id Passenger table makes foreign key references to U_id of User table. Status_id Passenger table makes foreign key references to Status_id of Train_Status Table. Train_id Passenger table makes foreign key references to Train_id of Train Table Train_Status Train_id Train_status table makes foreign key references to Train_id of Train Table PNR Train_status table makes foreign key references to PNR of Passenger table. Train Route Station_id Route table makes foreign key references to Station_id of Station table. Train_id Route table makes foreign key references to Train_id of Train Table Step 6: Identifying the relationships a. Passenger can book many tickets. Therefore the relations are 1.N. Trains are associated with each Train_status Therefore the relation is M.1. Trains can route from one route. Therefore the relations are N.1. Station has a set of Route. Therefore the relations are 1.N. ER/Studio Data Architect Use Cases Data modelers and architects have to respond to multiple levels of data-related business needs. Some key activities that may need their attention include: • Build out a data model as part of a development cycle • Discover and document existing assets across the data landscape • Create and populate a data warehouse • Build out an enterprise data model • Catalog metadata for data governance or data quality initiatives • Perform an impact analysis of new policies or projected changes to models, databases, or data fields ER/Studio Data Architect helps to address all of these situations, with robust logical and physical modeling, data dictionaries, forward and reverse engineering, and more. • Create effective data models to build a business-driven data architecture • Document and enhance existing databases to reduce redundancy • Implement naming standards to improve data consistency and quality • Effectively share and manage data models across the enterprise • Map data sources and trace origins to enhance data lineage Design Effective Data Models Data modeling helps organizations make better business decisions with accurately interpreted and rapidly changing data. Model data from relational, NoSQL, big data, BI and ETL sources. Whether you are creating a new model from a conceptual diagram or reverse-engineering from an existing database, IDERA ER/Studio Data Architect is a powerful tool that helps you easily and effectively design and manage your logical and physical data models. Build a Business-driven Data Architecture Data professionals need to ensure that everyone in the organization understands what the data is and can explain it in business terms.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |