Types Of Operator

Operators can be defined by the symbol or symbols to do something. This operator is divided into several sections according to function :

Arithmetic Operators

Arithmetic operators are used as symbols to perform arithmetic operations. True to its name this operator has several symbols for arithmetic operations such as are known in mathematics :

Symbols	Function
+	Adding
-	Alleviation
*	Multiplication
/	Division
**^	Rank

Logic Operators

Operators of logic functions to determine whether the value of the variable value in accordance with the desired boolean value. The value obtained is correct or incorrect. To obtain this value is used logical operators, which is divided into three parts:

Symbols	Function
.OR.	Or
>AND>	And
>NOT>	not

Comparisson Operators

Comparison operators are useful for assessing whether a variable has a value as expected, for example, will be assessed whether the value of A is greater than the value of B. For this type of surgery need to use the comparison operators, comparison operators:

Symbols	Function
>	More Than Big
<	More Than Small
=	Equal To
>=	More Than Big Or Equal To
<=	More Than Small Or Equal To
<>,#	Not Equal
$	Division To

String Operators

String operators are used to operating a string of characters. There are two string operators, known as the "+" and "-". String operators "+" is used to combine two variables together with the existing space, while the operator "-" is used to combine variables by eliminating the spaces that exist between

Read More

Types Of Data On Relational databases

By using a relational database package output Ashton-Tate as a reference, it is understandable that the type of data, files, and even many commands and functions are similar, in general, the type of data used in this package is divided into five kinds, namely:

Numeric

Numeric data types are useful to accommodate the amount of sequence data of the digits 0 to 9 which will be processed in mathematical operations, can be added, subtracted, multiplied or processed using other mathematical functions. Buisa numerical data are in accordance with 16 digit precision and the numerical value data can also contain a decimal number

Character

Character data type can hold all the computer characters that can be used. Type the characters a wider use of numeric data types, and data can accommodate karaklter characters 0-9, AZ, az, punctuation and other characters. The nature of this type of character called alfanumeric, because the type of data that can be accepted adalaha numeric or character string data, but it must be remembered that the characters here are not operated mathematically, for example, telephone numbers, house numbers.

Date

Date data type used to store data that obey the laws BC calendar, database packages already mempersiapkansatu types of data that is specific to the data date of receipt, and the type of data in the format U.S. : MM/DD/YY.

Memo

The data type of memo to fit the data, which contains a brief description of the package database, prepared a special data type. These data types can store data with a maximum of 4000 bytes or characters/digits.
This data type was created because there is data that cannot be determined with certainty, incoming numeric or character and Forms data format, you can also freely as you write with wordprocessing.

Logic

The data type of logic to receive data that can only be filled with yes or no, because sex can be sure if someone does not believe her husband. Things like that can be grouped into logical data type, because in pengisianya has only two alternative answers true or false / yes or no

Read More

System Configuration FoxBase

In line with developments in technology, relational database package foxbase abreast. Configuration required to run foxbase is :

• IBMpc xt at the computer or compatibles
• Memory More Than 512 Kb
• PC/MS DOS 2.0
• Dual Disk Drive

There are two types Foxabse, foxbase marketed for single user and multi user. Must use a single user does not have to use the system opreating PC / MS DOS version 3.0 or more because it will cause some difficulties. Into the use of multi-user hardware emnggunakan foxbase additional LAN (local Area Network), have been using MS-DOS version 3.1 and above, and all functions will work fine foxbase.



When installed on the hard disk of a computer, and dBASE III foxbase We can put in your hard disk, because it generally can not be given protection packet duplication, and is usually already available in the disk file to transfer the programs installed on your disk drive automatically.

In a relational database package generally consists of one disk, where the first disc is disk system, and other disk containing the overlay.

Read More

Familiar With Relational Databases

A database is a relational database management system package for data collection problems. This package can connect a single database file that anatara with other database files, without damaging the structure or data contained therein. Also with this package allows users to create new database files, and connect with the old database files without destroying the unity that already exists.

Seeing the success of the marketing package Ashton-Tate dBASE production, many companies are trying to follow the main companies in creating a database package rlational. Among them is with Fox Software + FOXBase.

In general, issued a relational database package ahir ahir this, Ashton-Tate took the package as a standard production output. Among the packages available now FOxBase package + package has the advantage over the other companies, because it has total compatibility with the output packet Ashton-Tate and also have a good response time.

Read More