Information about Rel algebra selection girija

set theory, selection, relational algebra, database - all the exercise sildes i have downloaded or referred from websites. i just orgainsed as topicwise for readers

DR.GIRIJA NARASIMHAN 2

Exercise 1- selection For example, the operation SID=101 selects all tuples in the input relation which have the value 101 in column SID. DR.GIRIJA NARASIMHAN Exercise 2- selection Select only A which has value one 3

Selection – exercise 1 & 2 Result For example, the operation SID=101 selects all tuples in the input relation which have the value 101 in column SID. DR.GIRIJA NARASIMHAN 4

Selection – exercise 3 Select the employee whose age is less than 30 or salary is greater than 4000 DR.GIRIJA NARASIMHAN 5

Selection – exercise 3 solution DR.GIRIJA NARASIMHAN 6

Selection – exercise 4 Select where placeofbirth and residence place have same value or same place. DR.GIRIJA NARASIMHAN 7

Selection – exercise 4 solution DR.GIRIJA NARASIMHAN 8

Selection – exercise 5 Select where person whose age is greater than or equal to 34 Select the person whose age and weight should be same DR.GIRIJA NARASIMHAN 9

Selection – exercise 5 solution DR.GIRIJA NARASIMHAN 10

Selection – exercise 6 DR.GIRIJA NARASIMHAN 11

Selection – exercise 6 solution DR.GIRIJA NARASIMHAN 12

Selection – exercise 7 DR.GIRIJA NARASIMHAN 13

Selection – exercise 8 DR.GIRIJA NARASIMHAN 14

Selection – exercise 8 solution DR.GIRIJA NARASIMHAN 15

relational algebra projection, selection, database, ... rel algebra projection ... by Dr. Girija Narasimhan 174 views.

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05-01-relational-algebra-1.mp4, Relational Algebra 1 - Select and Project Operators, Relational Algebra - Generalized Projection, rel algebra projection ...

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Relationen-Algebra Relationale Anfragesprachen Query Language (QL): ... DISTINCT-Klausel in SQL) Beispiele: Projektion, Selektion Beispiele: ...

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Relational algebra, first described by E.F. Codd while at IBM, is a family of algebra with a well-founded semantics used for modelling the data stored in ...

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Relational algebra: is closed (the result of every expression is a relation) has a rigorous foundation ; has simple semantics ; is used for reasoning ...

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In quantum mechanics, superselection extends the concept of selection rules. Superselection rules are postulated rules forbidding the preparation of ...

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