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ALTER TABLE Command: This command is used for variation of existing structure of the table in the given situation:
Syntax
ALTER TABLE
You require to put many constraints like that the database integrity is not compromised.
For your chosen project, you need to identify the current problem that you wish your project to solve. Produce a Problem Statement. The Problem Statement should explain the purpo
Example : Search the name, department number and salary of employees drawing minimum salary in that department. SELECT ENAME, SAL, DEPTNO FROM EMP WHERE SAL IN (SELECT MI
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
Define query language? A query is a statement requesting the retrieval of information. The portion of DML that includes information retrieval is known as a query language.
Homework chapter 10 no 3
A Functional dependency is described by X Y between two groups of attributes Y and X that are subsets of R specifies a constraint on the possible tuple that can make a relation
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
er diagtram for icici
Q. Explain data aggregatio n and discuss different design constraints. Sol. Aggregation One limitation of the E-R model is that it cannot express relationships amon
Define Physical and Logical independence Ans: Physical data independence: The ability to modify physical level without causing application program to be rewritten. Logic
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