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What is Cross Product?
Simply Cross product is Binary Operator
Define the terms i) DDL ii) DML DDL: Data base schema is particular by a set of definitions expressed by a special language known as a data definition language. DML: A data
We face problem of stock Opening balance and closing balance in Minus
Define instance and schema? Instance: Collection of data stored in the data base at a certain moment is Schema: The overall design of the data base is known as the data base
Q.1 Briefly discuss the different layers of ANSI SPARC architecture. Ans: The three layers of ANSI SPARC architecture are like this: 1. Internal view is at the lowest leve
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
What is the difference between WHERE and HAVING clauses?. Predicates in the WHERE clause applies to every tuple while the predicate in the HAVING clause applies to groups.
What Is Sql? Structured Query Language (SQL) is a standard query language. It is usually used with all relational databases for data manipulation and definition. All the re
What is the difference between serial and sequential files? How searching is applied on both? Ans: A serial file is one where the records have been stored in the order where
What is conceptual model ? A conceptual model is a independent of both hardware and software.
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
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