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How persistent programming languages differ from traditional programming languages? Database languages vary from traditional programming languages in that they directly manipul
Suppose R is a relation with attributes A1, A2,..., An. As a function of n, tell how many superkeys R has, if: 1.1 The only key is A1. 1.2 The only key is A1 and A2. 1.3 The o
Extend your CREATE TABLE statement from problem 3 with referential integrity constraints. Updates and deletes on related rows are restricted. 6. From examination of the sample data
What is an ERD?
What is a database? Database - Basically in simple terms A database is a collection of inter related data and/or information stored so which it is available to several users
Why DML is used for? DML is used to Manipulation and processing of database. DML is provided for manipulation & processing of database. (Data stored in the database is processed
Shared lock or Read Lock It is requested by a transaction that needs to just read the value of data item. A shared lock on a data item does not permit an exclusive lock
sy bcs project of hospital managment system
Define page. The database is partitioned into some number of fixed-length blocks, which are referred to as pages.
Explain the concepts of relational data model? Relational Data Model - The relational model was first introduced through Prof. E.F. Codd of the IBM Research in the year 1970
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