Getting Started With SQL Data Type and Operator

Rakesh
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Information about Microsoft SQL Server

Microsoft SQL Server is a one-type database
Microsoft SQL Server was created by Microsoft for Web and Desktop application data management
For any database created the main concept is for security; in this the create-member-level security is for data access in any data application

SQL Operations

Here we see how to work with SQL Database basic operations such as print data, addition(+), subtraction (-), multiplication (*), division (/) and so on.

We will now see some SQL operations.

Print

The print command is used to print in the SQL editor.

Command

Print ’write something’

Press F5 to execute.

Unary Operator

Unary operators are one type mathematical operator.

Two type unary operators.

A unary operator assigns to a value positive or negative at zero (0).
For example, a positive value +1 and a negative value -1.
This means that this is assigned to in a mathematical series value as in -2, -1, 0, 1, 2…

Binary Operation

Binary operation is a very useful concept in SQL databases.

The following are one-by-one binary operations.

Addition (+)

This operation is uses with a numeric value or string type data.
For example:

This operator is used for number addition and to join two words.
Subtraction (-)

This is used to subtract two number values.
Multiplication (*)

This is used to multily two number values.
Division(/)

This is used to divide two number values.

In this see a SQL database follows all mathematical rules. Any numeric value can never be divided by Zero (0).
Modulo (%)

It's very useful in numeric calculation.
Bracket ) (

It's used in every computer language and database.
Bit Operation (~)

Our computer language by default works with bit values 0 and 1. We see here some binary operations with SQL. How do they work? Bit operations work with the ~ symbol.

Command: ~ number data

Bitwise NOT Operator

It's a not unary operation. It defines any numeric data on the left side.

Command : ~ number

print ~ 12
get -13

Bitwise AND operator (&)

It's for a two-value comparison.

Command : value1 & value2

print ~12 & ~13
get -14

Bitwise OR operator ( | )

It's one more comparison operator.

Command : value1 | value2

print ~12 | ~13
get -13

Bitwise Exclusive OR operator ( ^ )

It's also a comparison operator.

Command : value1 ^ value2

print 127^130

SQL Variables And Datatypes

In this, see how to declare programmatically SQL variables and data types. Data types are a very important part of any database.

Declare Variable

The Declare keyword is used to declare a variable.

For example:

DECALRE value datatype

declare @12 int
declare @Rakesh char
declare @17052015 date

Variable Initialize

We declare a variable after it;s initialized.

In this use must @ mark initialize for any variable and also use the SELECT or SET keyword.

Many types of variables are available in databases, let's see one-by-one some variables.

Boolean Variable

The Boolean data type uses bit type operators, true/false, yes/no, 1/0 and so on.
Number variable

Any number variable is declared using int, smalltype, bigint data types.
Decimal Type

It's used for decimal numeric value declaration.
Float type

Used for factorial data type declaration. It is also known as a Real numbers.
Money

It's used for currency value declaration.
Character and String

It's used for character and string value data. In character data there is only word characters and in a string are words. Both types of declarations use a single quote.
String

In SQL any string data value uses varchar and nvarchar data types.
Time

it's for time data in a database.
Date

It's for date data types in SQL.