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Types of data independence
Data independence can be classified into the following two types:
Physical Data Independence: This means that for any change made in the physical schema, the requirement to change the logical schema is minimal. This is practically simpler to achieve.
Logical Data Independence: This means that for any change made in the logical schema, the requirement to change the external schema is minimal. As we shall see, this is a little complex to achieve.
Define seek time. The time for repositioning the arm is known as the seek time and it enhances with the distance that the arm is known as the seek time.
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DDL Compiler The DDL compiler changes the data definition statements (such as CREATE TABLE .... in SQL) into a set of tables having metadata tables. These tables have infor
Self-Join: In a self join a table is joined with itself. Let consider the following sample partial data of EMP table EMPNO ENAME MGRID
What function divides one numeric expression by another and returns the remainder? MOD function divides one numeric expression by another and returns the remainder.
This project will involve designing and creating a database for an organization. In the design of a database, there is no single "perfect" design. So your database design may not
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With the help of a diagram defines the typical element modules of a DBMS? The functional elements of a database system can be widely divided into: 1) Storage manager and 2) q
construct a b-tree for the following set of key values 2,3,5,7,11,17,19,23,29,31.assume that the tree is initial empty and the values are added in ascending order
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