A Study on

Operators

A Mini Project Report in ITLAB Submitted to JNTU,

Kakinada in Partial Fulfilment for the Award of the Degree of

MASTER OF BUSINESS ADMINISTRATION

Submitted ByK. Swapna

(Reg. No. 13491E0012).

DEPARTMENT OF MASTER OF BUSINESS ADMINISTRATIONQIS COLLEGE OF ENGINEERING & TECHNOLOGY

An ISO 9001: 2008 Certified Institution and Accredited by NBA (Affiliated to JNTU, Kakinada and Approved by AICTE)

Vengamukkapalem, Pondur RoadONGOLE –523 272.

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OPERATORS

Definition:

SQL supports a number of operators to perform operators on date tabled in a table.

These are “three” types

1. Arithmetic operators

2. Relational operators

3. Logical operators

1. Arithmetic operators:

SQL supports all the basics arithmetic operators. They generally perform on column values of a table with ‘select clause’. The arithmetic operators are

ADDITION (+):

This is used to add the values of two or more columns.

Syntax: select < col1+col2+col3+...........> from < table name >;

SUBSTRACTION (-):

This is used to subtract the values of column from another column.

Syntax: select < col1-col2-col3......> from < table name>;

MULTIPLICATION (*):

Thus is used to multiply he values of two or more columns.

Syntax: select < col1*col2*col3*.........> from < table name>;

DIVISION (/):

This is used to divided the values of column from another name

Syntax: select < col1/col2/.......> from < table name>;

RELATIONAL OPERATORS:

Relational operators are generally used to compare two values specified by a command. The relational operators are given below.

EQUAL TO:

This operators is used with ‘where’ clause. It selects all the selected rows from one or more tables. If the required values is equal to the existing values.

Syntax: select< columns> from < table name> where column1=column2;2

LESS THAN:

It selects the selected rows from one or more tables if the given values are less than existing values.

Syntax: select< columns> from < table name> where col1< col2;

LESSTHAN OR EQUALTO:

It selects all the selected rows from one or more tables. If the values is less than or equal to the existing value

Syntax: select < column> from < table name > where col1<=col2;

GREATERTHAN:

It selects all the selected rows from one or more tables. If the given values is greater than or equal to existing values

Syntax: select < column > from < table name > where col1>= col2;

LOGICAL OPERATORS:

Logical operators are used to check the multiple conditions in the query

SQL supports the following operators

AND:

This operator is used between two conditions. If the given conditions are true then it always the outputs

Syntax: select < columns> from < table name > where< condition1> and < condition2> and ......;

OR:

This operator is used between the conditions. If any one of the given condition is true then it displays the output

Syntax:

Select < columns > from < tables name > where < condition1> or < condition2> or .......;

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