Answers were Sorted based on User's Feedback
Answer / sohail
Normalization is a rule applied on the database table in
order to remove redundancy of data.
|Is This Answer Correct ?||12 Yes||1 No|
Answer / lakshmi
Normalization is the process of breaking of data and
storing it into different tables to reduce the redundency
and to avoid nulls
|Is This Answer Correct ?||10 Yes||0 No|
Answer / amruta
It is a step by step process to decompose or brake a large
table into smaller no of tables. To eliminate Insertion,
updating and deletion anomalies.
|Is This Answer Correct ?||7 Yes||2 No|
Answer / abc
normalization is a process to remove data redundancy
|Is This Answer Correct ?||4 Yes||0 No|
Answer / dhivya
Normalization is a process of designing a database in which
the redundancy is avoided. It includes several Normal forms
namely 1NF, 2NF, 3NF, BCNF, 5NF etc...
|Is This Answer Correct ?||3 Yes||0 No|
Answer / ganesh
Normalization is the process of splitting a table into
smaller units to avoid redundancy and reducing the retrieval
time of a data. Let consider if your table having more than
one million records. Now you want to pick up the name or
data of a particular person in a table. It will take much
time to display the data. To overcome this drawback we user
|Is This Answer Correct ?||2 Yes||0 No|
Answer / priya
can you explain with example...
|Is This Answer Correct ?||0 Yes||2 No|
what is sql.
What are the Restrictions on Cursor Variables?
State the advatage and disadvantage of Cursor's?
how to debugg a procedure or package using dbms_output.put_line in plsql
What is a cursor for loop ?
package specification-3 procedures package body-2 procedures will is execute
suppose I have two table one Emp and other is dpt. Emp table has a field ,dept id,name ,sal and dpt table has a field dept id,dept name. Now I want to find out the emplyee list whose sal is between 2000-3000 from dept x.
I have a table with 1 million records out of which 10,000 records are of unique records, then if I will implement index, then which type of index shall I use and why shall I use?
suppose u hav 1 book with set...page 1-100 n 101 -200 now print page from 2-100 n 102 -200... how we will do..?
Does SQL*Plus contains pl/sql Engine?
create SQL (both DML/DDL) statements appropriate for the creation of relational structures & constraints and other objects for a given case study, the population of these tables and the manipulation (querying/updating) of the stored data. 2. Create, develop and use the PL / SQL Program Units Procedures, Functions as a progression towards Object Oriented Relational Database Programming. 3. Package a collection of logically related Procedures and Functions together to further move towards development of Objects which reflect the principle of Data Abstraction whereby only an Object specified in the Interface is accessible to the end user. 4. Select, create, and use appropriate Database Triggers to impose agreed specific constraints on a Database Table. 5. Provide a full and detailed evaluation which includes a comprehensive test execution plan and its implementation for each of the above. Consider the following case study: Perilous Printing is a medium size printing company that does work for book publishers throughout UK. The company currently has 10 offices, most of which operate autonomously, apart from salaries, which are paid by the head office. Currently the sharing and communication of data, is carried out using multi- user networked access to a centralised RDBMS. Perilous Printing jobs consist of printing books or part of books. A printing job requires the use of materials, such as paper and ink, which are assigned to a job via purchase orders. Each printing job may have several purchase orders assigned to it. Likewise, each purchase order may contain several purchase order items. The following tables form part of the transactional RDB that the company uses: office (office_no, o_addr, o_telno, o_faxno, mgr_nin) staff (staff_no, nin, fname, lname, s_addr, s_telno, gender, dob, position, taxcode, salary, office_no) publisher (pub_no, p_name, p_city, p_telno, p_faxno, credit_code, office_no) book_job (job_no, pub_no, job_date, job_desc, job_type, job_status, supervisor_nin) purchase_order (job_no, po_no, po_date) po_item (job_no, po_no, it_no, qty) item (it_no, it_desc, amt_in_stock, price) office contains details of each office and the office number (office_no) is the key. Each office has a Manager represented by the manager’s national insurance number (mgr_nin). staff contains details of staff; the staff_no is the key. The office that the member of staff works from is given by office_no. publisher contains details of publisher and the publisher number (pub_no) is the key. Publishers are registered with the nearest office in their country, given by office_no, and they are given a credit code that can have the values “AA”, “AB”, “BB”, “BC”, “CC”, “CD” and “DD”. If a publisher is to be deleted then not only the publisher’s entry from the publisher table will have to be removed but all the data associated with the particular supplier has to be deleted too book_job contains details of publishing jobs and the job number (job_no) is the key. The publisher is given by the publisher number (pub_no) and the supervisor for the job by supervisor_nin. The job type can be either null or urgent; whereas the job_status can be “ongoing” or “completed” purchase_order contains details of the purchase orders for each job and the combination of job number and a purchase order number (job_no, po_no) form the key. Each printing job may have several purchase orders assigned to it. item contains details of all materials that can be used in printing jobs and the item number (it_no) is the key. po_item contains details of the items on the purchase order and (job_no, po_no, it_no) forms the key. In the above given database schema, descriptions are strings of characters (at most 30 characters long), any dates (except the job_ date) stored cannot be after the current system date, and quantities and prices are assumed to be non-negative numbers.
Source is Sales Table: Sno Prod Sales Sales_Amount 1 A 10 2000 2 A 20 1000 3 C 10 3000 4 D 30 4000 5 A 20 1000 Target : Sales_Count T_Sales_Amt Sales_Count(A) T_Sales_Amt(A) 90 11000 50 4000 In single query, pls tell me.