Answer / shahnaz

Normalization is used to improve the performance of database and is applied in the last step of logical database design.The Goal of Normalization is to
1.Eliminate the duplicate data from table
2.Ensure data dependency

we can achieve this by creating multiple tables for each set and by creating primary and foreign keys and building relationship between the newly created tables.

Answer / dhivya

when large amount of data required in database we need to find important data.
In normalization there will be important primary keys that must merge together so that we kind find the relations of the keys.
Eg. trans Id,video,cust ID
cust ID be the primary key in customer table
eg. cust ID, name, address, phone no, mail id 

Answer / rizwana

To decompose a large relation into two or more relations then we can use normalization

Why we use pl sql?

0 Answers  

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How do I partition in sql?

0 Answers  

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Table1: Col1 col2 1 2 10 3 4 89 5 6 Table:2 Col1 col2 3 2 9 5 4 7 6 87 With the help of table1 and table2 write a query to simulate the fallowing results. Output1: Col1 col2 1 2 2 3 3 4 4 5 5 6 Output2: Col1 col2 2 3 10 4 5 89 6 7 1.Write query for single row to multiple row using sql statements. Eg:a,b,c,d,e,f Change to A B C D E F 2. Write query for multiple row to single row using sql statements. Eg2 A B C D E F Change to Eg:a,b,c,d,e,f Table1: Col1 col2 8 5 2 9 4 2 5 1.Write a query to select all the rows from a table1,if the value of A is null then corresponding B’s value should be printed in A’s value.if the value of A is null in that table then corresponding B’s value should be printed as 30. 2. write a query to find the sum of A and B .display the max among both. 3.write a query to find total number of rows from table 1. Note: if any column value is null in a row then that row should be considered as 2 rows. 4.write a query to display all the records of table1 except A containg 2 as well B containg 5. 5.rewrite the fallowing without using join and group by. Select b.title,max(bc.returneddate –bc.checkoutdate)” mostdaysout” From bookshelf_checkout bc, Book shelf B Where bc.title(+)=b.title Group by b.title. 6.rewrite fallowing query Select id_category from category_master X where exists (select 1 from sub_category Y where X.id_category=Y.id_category) Customer: Name phone1 phone2 phone3 bitwise A 23456 67890 12345 --- B 67459 89760 37689 --- Don’t_call Col1 67890 37689 1.q) update the customer table of bitwise with 1 or 0. Exists in don’t_call table menas show -1 Other wise -0. Output. Name bitwise A 010 B 010

0 Answers   Protech,

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What is the function that is used to transfer a pl/sql table log to a database table?

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how i do the database testing of online money transactions between two parties (client and organization). suppose our company makes a website for our client and give a extra feature of online money transaction with there clients then how i test this feature in database testing

1 Answers  

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What is not equal in sql?

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Explain the structure of pl/sql in brief.

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Are subqueries better than joins?

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what is julian date in oracle

2 Answers  

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What is the criteria while applying index to any column on any table.

1 Answers   Infogain,

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What will be the output of this Query? select to_char(trunc(add_months(sysdate-3),mm),mm/dd/yyyy) from dual

6 Answers   Cap Gemini, TCS,

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what is foreign key? : Sql dba

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