Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
The First Normal Form (1NF)
Let us first describe 1NF:
Definition: A relation (table) is in 1NF if
1. There are no duplicate tuples or rows in the relation.
2. Every data value stored in the relation is one-valued
3. Entries in a column (attribute) are of the similar kind (type).
Please note that in a 1NF relation the order of the attributes (columns) and tuples (rows) does not matter.
The first necessity above means that the relation must have a key. The key may be one attribute or composite key. It may even, possibly, have all the columns. The first normal form describes only the basic structure of the relation and does not determine the anomalies.
what characterizes the levels in RAID technology
why older data models are being replaced by new data models.
MySQL Database Merge Project Description: I have two databases, I need merge the data of one database into another Work to be done online right now. Payment can be done
Creating views with Replace option : This option is used to alter the definition of the view without recreating and dropping it or regranting object privileges previously granted o
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
Dirty Reads: T10 reads a value which is updated by T9. This update has not been committed and T9 aborts. T9 T10 Value of x old value = 200
What is Gathering information and Producing ERD Gathering information: This could be a written document that explains the system in question with reasonable quantity of detai
find the name of supplier who supply some red part
What is serialization? Where it is used and why? Serialization is a basic term used for mechanisms which enable objects and object structures to be converted into portable for
Consider the following relational scheme: R (a,b,c,d,e,f) and its corresponding set of FDs {d→ a, be → c, ac → e, b → f, f → d, a → c}. a. Is the following decomposition i) non
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd