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The Projection select certain column from the table and discarding the other columns.
The result of the Projection operation can hence be visualized as a vertical partition of the relation into two relations, one has needed columns (attributes) & contain the result of the operations & the other contains in the discarded column.
Binamani Boro
Guwahati
Wiki User
∙ 11y ago
Wiki User
∙ 9y agoSelection and projection are terms used in relational algebra. Selection is the term used for "where" relational algebra . Projection is the term used for "select" in relational algebra .
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What is difference between selection and projection operation?
Projection is from which columns the result should come... Selection means selecting perticular row.
Difference between the Selection tool and the Direct Selection tool?
selection tool for selecting total object direct selection tool for selecting separate points in object.
What is the difference between SIMD and MIMD?
SIMD (single instruction, multiple data) describes multiple processing elements that work on the dame operation on multiple data points. MIMD (multiple instruction, multiple data) is the number of processors that function independently.
What is a function statement?
A function statement is a block where the function is declared and defined.
What is the difference between function and recursive function?
I will explain in the easiest way the difference between the function and recursive function in C language. Simple Answer is argument of the function is differ but in the recursive function it is same:) Explanation: Function int function(int,int)// function declaration main() { int n; ...... ...... n=function(a,b); } int function(int c,int d) { ...... ...... ...... } recursive Function: int recursive(int,int)// recursive Function declaration main() { int n; ..... ..... ..... ..... n=recursive(a,b); } int recursive(int a,int b) { ..... .... .... .... } Carefully see, In the recursive Function the function arguments are same.
What is difference between selection and projection operation?
Projection is from which columns the result should come... Selection means selecting perticular row.
Why selection query is first done than projection query?
Selection has more power to reduce size (Number of rows) while projection can not reduce number of tuples
Function of squid arms?
for self defence and for projection through the water
The operation performed on the input of a function?
function rule
What is an additive function?
An additive function is a unary function which preserves the addition operation.
What is the operation of a selection sort?
You sort a selected range of cells.
What is the null join?
The join which does not fetch any result that is it returns null value after projection operation is called null join
What is function of NOP instructions?
no operation is not performed
How can cement slurry modefy to enhance its function in oil well cementing operation?
How can cement slurry modefy to enhance its function in oil well cementing operation?
What are the difference between function and operation?
Function is the purpose of something. Operate is how something works.
What is a tail like projection that protubes from the cell body and function locomotion?
You most likely are talking about, "Flagellum".
What is the function of projection?
They increase the surface area of small intestine and thus, increase the rate of absorption of food...
