Hibernate allows us to do object relational mapping. Simply this mean‚ conversion of objects derived from java classes inside the application‚ directly to tables in the database. This will reduce the effort utilized in drawing ER diagrams‚ normalization (conceptual design) as well as physically writing SQL coding to complete the physical design inside the RDBMS. Hibernate will prevent getting your java code dirty via writing SQL within it. If you use hibernate‚ no sql within your java application
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IS582 Final Exam Study Guide YOU MAY WANT TO PRINT THIS GUIDE. 1. The final exam is "open book‚ open notes." The maximum time you can spend in the exam is 3 hours‚ 30 minutes. If you have not clicked the Submit For Grade button by then‚ you will be automatically exited from the exam. In the final exam environment‚ the Windows clipboard is disabled‚ and so you will not be able to copy exam questions or answers to or from other applications. 2. You should click the Save Answers button in the exam
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Data definition languages‚ DML. Overall data base structure. Various Data models: Hierarchical‚ Network‚ ER and their comparisons UNIT2: Relational Database Language and interfaces: Relational data model concepts‚ integrity constraints ‚Keys domain constraints‚ referential integrity‚ assertions triggers‚ foreign key relational algebra‚ relational calculus‚ domain and tuple calculus‚ SQL data definition queries and updates in SQL. UNIT3: Normalization in Design of Databases: Functional
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interacting with data and data-access interfaces. Developers can model and access their data using a conceptual schema that is mapped to a relational database via a flexible mapping. Interaction with the data can take place using a SQLbased data manipulation language and iterator APIs‚ or through an object-based domain model in the spirit of object-to-relational mappers. We demonstrate how the Entity Framework simplifies application development using sample scenarios. We illustrate how the data is
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What kinds of multi-user DBMS architectures do you know? 34. What are the disadvantages of DBMS? 35. What is the main purpose of Codd’s rules? 36. Define the basic relational model terminology. 37. Give an example of attribute domain. 38. What is relation degree? 39. What is cardinality? 40. What is mathematical basis of relational model? 41. What are the properties of relations?
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Avadhani VIII A Data Base Concepts A database management system (DBMS) is the software that allows a computer to perform database functions of storing‚ retrieving‚ adding‚ deleting and modifying data. Relational database management systems (RDBMS) implement the relational model of tables and relationships. Database Data: is the required particular piece of information which we need. The information in the database is stored in records. Records: The records are information held
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Static or Dynamic CheckPoint May 6‚ 2011 Static or Dynamic * As a network administrator for a company‚ you want to configure an IP route between two routers. Of static and dynamic routing‚ which is more appropriate? A router is a device that connects two LANs or WANs together. It has the ability to determine the best known route to send packets to a destination. The factors used to determine the best known route include not only the fastest route‚ but the most efficient. By using
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== are all Relational operators. 5.) The if-then statement is an example of a conditioal structure. 6.) The Selection structure is based on boolean logic. 7.) The if-else statement is know as a dual alternative decision structure. 8.) A nested if statement is used to ask multiple questions before deciding what processing path to take. True False ***************************************************************** Unit 5 Labs 1.) Lab 5.1: Evaluating Conditions with Relational Operators.
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creates a relationship between that table and the table where the primary key was first defined. _________________________ 2. One benefit of a relational database management system is that it contains a built-in query language‚ which lets you obtain immediate answers to the questions you ask about your data. _________________________ 3. A(n) relational database management system provides protection for your data through the use of security‚ control‚ and recovery facilities. _________________________
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Choose the correct or best alternative in the following: Q.1 In the relational modes‚ cardinality is termed as: (A) Number of tuples. (B) Number of attributes. (C) Number of tables. (D) Number of constraints. Ans: A Q.2 Relational calculus is a (A) Procedural language. (C) Data definition language. Ans: B Q.3 The view of total database content is (A) Conceptual view. (C) External view. Ans: A Q.4 Cartesian product in relational algebra is (A) a Unary operator. (B) a Binary operator. (C) a Ternary
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