TUPLE : Is the "ROW" in a table and ATTRIBUTE : Is the "COLUMN" and it can also be called as "ATTRIBUTE". Annapurna table is collection of attributes ..... attribute is nothing but property tuple is the collection of information abt the attributes of table for single instance
In database a key is a field that we use to sort a data.whereas superkey is a subset of attribute so that no tuple have the same combination of values.
In a relational schema, each tuple is divided into fields called attributes. Each attribute corresponds to a specific piece of data within the tuple.
Skill is something you attain through training and repetition, while attribute is a character trait.
An attribute in the database terms is called as fields. A group of fields is known as a record or tuple. Attributes can be either simple or composite and single or multi-valued .
In a relation we have number of tuple R ={t1,t2,t3.....tn}, nd they follow integrity constraints nd each tuple has a primary key pk.if any of the d two tuple have same attribute. for instance t1=t2 then its pk wud be same too.. but this violates the key constraint.. hence duplicacy not allowed in tuple... enjoy Rijo Rajan
An attribute is a class member variable while a behaviour is a class member method.
Relational tuple calculus has its variables range over tuples, where domain relational calculus ranges its variables over the field values, or domain elements. Both types of calculus are subsets of first order logic.
The difference is that partial dependency is when a database's attribute is only partially dependent on the primary key. Fully functional dependency is when the attribute is entirely dependent on the key.
A normal attribute is an attribute present in a schema and which has to be entered while entering a tuple.A derived Attribute is one which can be inferred(derived) from another normal attribute and it need not be a part of a schema.For e.g.-> In a schema, Date-of-Birth is a normal attribute.While Age is a derived attribute which can be derived from the Date-of-Birth
TUPLE : Is the "ROW" in a table
single valued attribute are one character in a record
A key is a set of attributes that uniquely identifies an entire tuple, a function dependency allow us to express constraints that uniquely identify the values of certain attribute.