How to Create Database in C Language

Piyush Golani April 08, 2014 Leave a Comment



Have you ever thought of Creating DATABASE in C LANGUAGE ?
Or you might be asked in school or college to create temporary database in C Language using File Handling !

 So, i thought of this and have created temporary database of taking Employee Details in C language using File Handling.

 Like you even i was searching on Google for the same but hasn't found anything. So, I thought let's write our own piece of code and let's share it with the people :) 

Look at the Snap Shot below :-

I wrote about 600-650 lines of code to create database in C Language . The Program is capable of
  1. Building Employee Table
  2. List the Employee Tables 
  3. Insert Query
  4. Delete Query
  5. Edit Query
  6. Search Record
  7. Sort the table

================================== CODE ===============================



#include<string.h>
#include<dos.h>
#include<conio.h>
#include<stdio.h>
#define max 20
struct employee
{
char name[20];
long int code;
char designation[20];
long int exp;
long int age;
};
struct employee emp[max],tempemp[max],sortemp[max],sortemp1[max];
int num=0;
FILE *fp;
void main()
{
void build();
void list();
void insert();
void deletes();
void edit();
void search();
void sort();
void menu();
       // void box(int,int,int,int);
char option;
clrscr();
menu();
     // box(18,4,65,6);
while((option=getchar())!='q')
{
switch(option)
{
case 'b':
build();
break;
case 'l':
list();
break;
case 'i':
insert();
break;
case 'd':
deletes();
break;
case 'e':
edit();
break;
case 's':
search();
break;
case 'n':
sort();
break;
}

 menu();
}
}
void menu()
{
clrscr();
highvideo();
printf(" ");
printf("\n\t\t*****WelCome To Employee Data Centre*****");
// normvideo();
printf("\n");
printf(" ");
printf("\nPress b---->Built The Employee Table ");
printf(" ");
printf("\nPress l---->List The Employee Table");
printf(" ");
printf("\nPress i---->Insert New Entry");
printf(" ");
printf("\nPress d---->Delete An Entry");
printf(" ");
printf("\nPress e---->Edit An Entry");
printf(" ");
printf("\nPress s---->Search Arecord");
printf(" ");
printf("\nPress n---->Sort The Table");
printf(" ");
printf("\nPress q---------->QUIT ");
printf(" ");
printf("\nOption Please ----->");
}
void build()
{
int i=0;
clrscr();
highvideo();
printf("Build The Table ");
printf("\n");
// normvideo(); // to proper format text it will include in <conio.h> 
printf("\nmaximum number of entries ----- > 20");
printf("\n");

 printf("\nhow many do you want ----->");
scanf("%d",&num);
clrscr();
fp=fopen("D:\\input.txt","wb");
printf("\nEnter The Following Items");
for(i=0;i<=num-1;i++)
{
printf(" \nName ");
fflush(stdin);
scanf("%s",&emp[i].name);
fprintf(fp,"%s",emp[i].name);
printf("\nCode ");
scanf("%ld",&emp[i].code);
fprintf(fp,"%ld",emp[i].code);
printf("\nDesignation ");
fflush(stdin);
gets(emp[i].designation);
fprintf(fp,"%s",emp[i].designation);
printf("\nYears of Experience ");
scanf("%ld",&emp[i].exp);
fprintf(fp,"%ld",emp[i].exp);
printf("\nAge ");
scanf("%ld",&emp[i].age);
fprintf(fp,"%ld",emp[i].age);
}
fclose(fp);
printf("\ngoing to main menu");
delay(500);
}
void list()
{
int i=0;
clrscr();
highvideo();
printf(" ********List The Table********");
printf("\n");
highvideo();
fp=fopen("d:\\input.txt","rb");
printf(" Name\tCode\tDesignation\t Years(EXP)\t  Age");
for(i=0;i<=num-1;i++)
{
// normvideo();
  // fscanf(fp,"%s",&emp[i].name);
printf("\n%s",emp[i].name);
  // fscanf(fp,"%ld",&emp[i].code);
printf("\t%ld",emp[i].code);
  // fscanf(fp,"%s",&emp[i].designation);
printf("\t\t%s",emp[i].designation);
  // fscanf(fp,"%ld",&emp[i].exp);
printf("\t\t%ld",emp[i].exp);
  // fscanf(fp,"%ld",&emp[i].age);
printf("\t%ld",emp[i].age);
printf("\n");
}
printf("\ngoing to main menu");
getch();
}
void insert()
{
int i=num;
clrscr();
num+=1;
highvideo();
printf("\n**********Insert New Record*************");
printf("\n");
// normvideo();
printf("\n\nEnter The Following Items");
fp=fopen("D:\\input.txt","wb");
printf("\n\nName :- ");
fflush(stdin);
gets(emp[i].name);
fprintf(fp,"%s",emp[i].name);
printf("\nCode :- ");
scanf("%ld",&emp[i].code);
fprintf(fp,"%ld",emp[i].code);
printf("\nDesignation :- ");
fflush(stdin);
gets(emp[i].designation);
fprintf(fp,"%s",emp[i].designation);
printf("\nYears of Experience :- ");
scanf("%ld",&emp[i].exp);
fprintf(fp,"%ld",emp[i].exp);
printf("\nAge :- ");
scanf("%ld",&emp[i].age);
fprintf(fp,"%ld",emp[i].age);
printf("\n\n");
printf("\nRecord inserted going to main menu");
delay(500);

 }
void deletes()
{
int code;
int check;
int i;
clrscr();
highvideo();
printf("\n*************Delete An Entry***************");
// normvideo();
printf("\n");
printf("\n\nEnter An JobCode To Delete That Entry :- ");
scanf("%ld",&code);
for(i=0;i<=num-1;i++)
{
if(emp[i].code==code)
{
check=i;
}
}
for(i=0;i<=num-1;i++)
{
if(i==check)
{
printf("Record Deleted......");
continue;
}
else
{
if(i>check)
{
tempemp[i-1]=emp[i];
printf("Record Deleted......");
}
else
                    {
tempemp[i]=emp[i];
}
}
}
num--;
for(i=0;i<=num-1;i++)
{
emp[i]=tempemp[i];
}
}
void edit()
{
int i;
int jobcode;
void editmenu();
void editname(int);
void editcode(int);
void editdes(int);
void editexp(int);
void editage(int);
char option;
clrscr();
highvideo();
printf("\n **********Edit An Entry************* ");
printf("\n\n");
// normvideo();
printf("\nEnter An jobcode To Edit An Entry----> ");
scanf("%ld",&jobcode);
editmenu();
for(i=0;i<=num-1;i++)
{
if(emp[i].code==jobcode)
{
while((option=getchar())!='q')
{
switch(option)
{
case 'n':
editname(i);
break;
case 'c':
editcode(i);
break;
case 'd':
editdes(i);
break;
case 'e':
editexp(i);
break;
case 'a':
editage(i);
break;
}
printf("Record Edited........");
editmenu();
}
}
}
}
void editmenu()
{
clrscr();
printf(" \nWhat Do You Want To edit");
printf("\n n--------->Name");
printf("\n c--------->Code");
printf("\n d--------->Designation");
printf("\n e--------->Experience");
printf("\n a--------->Age");
printf("\n q----->QUIT");
printf("\n Options Please ---->>> ");
}
void editname(int i)
{
printf("\nEnter New Name-----> ");
fflush(stdin);
gets(emp[i].name);
}
void editcode(int i)
{
printf("\nEnter New Job Code-----> ");
scanf("%ld",&emp[i].code);
}
void editdes(int i)
{
printf("\nEnter new designation-----> ");
fflush(stdin);
gets(emp[i].designation);
}
void editexp(int i)
{
printf("\nEnter new Years of Experience");
scanf("%ld",&emp[i].exp);
}
void editage(int i)
{
printf("\nEnter new Age");
scanf("%ld",&emp[i].age);
}
void search()
{
int jobcode,i;
clrscr();
highvideo();
printf("\n\t\t\tWelcome To Search Of Employee Database");
// normvideo();
printf("\n\n");
printf("\n\nYou Can Search Only By Jobcode Of An Employee");
printf("\nEnter Code Of An Employee");
scanf("%ld",&jobcode);
for(i=0;i<=num-1;i++)
{
if(emp[i].code==jobcode)
{
printf("\n Name Code Designation Years(EXP) Age");
printf("\n ------------------------------------------------------");
printf("\n Employee Name :- %s",emp[i].name);
printf("\nEmployee Code :- %ld",emp[i].code);
printf("\nEmployee Designation :- %s",emp[i].designation);
printf("\nEmployee Exp :- %ld",emp[i].exp);
printf("\nEmployee age :- %ld",emp[i].age);
printf("\n");
}
}
printf("\ngoing to main menu");
getch();
}
void sort()
{
void sortmenu();
void sortname();
void sortcode();
void sortdes();
void sortexp();
char option;
void sortage();
clrscr();
highvideo();
printf("\nSort The Databse By JobCode");
// normvideo();
printf("\n\n");
sortmenu();
while((option=getchar())!='q')
{
switch(option)
{
           case 'n':
sortname();
break;
case 'c':
sortcode();
break;
case 'd':
sortdes();
break;
case 'e':
sortexp();
break;
case 'a':
sortage();
break;
}
sortmenu();
}
}
void sortmenu()
{
clrscr();
printf("\n What Do You Want To edit");
printf("\n n--------->Name");
printf("\n c--------->Code");
printf("\n d--------->Designation");
printf("\n e--------->Experience");
printf("\n a--------->Age");
printf("\n q----->QUIT");
printf("\n Options Please ---->>> ");
}

void sortname()
{
int i,j;
struct employee temp[max];
clrscr();
for(i=0;i<=num-1;i++)
{
sortemp1[i]=emp[i];
}
for(i=0;i<=num-1;i++)
{
for(j=0;j<=num-1;j++)
{
if(strcmp(sortemp1[i].name,sortemp1[j].name)<=0)
{
temp[i]=sortemp1[i];
sortemp1[i]=sortemp1[j];
sortemp1[j]=temp[i];
}
}
}
for( i=0;i<=num-1;i++)
{
printf("\n Name Code Designation Years(EXP) Age");
printf("\n ------------------------------------------------------");
for( i=0;i<=num-1;i++)
{
printf("\nEmployee Name :-%s",sortemp1[i].name);
printf("\nEmployee code :-%ld",sortemp1[i].code);
printf("\nEmployee Designation :-%s",sortemp1[i].designation);
printf("\nEmployee exp :-%ld",sortemp1[i].exp);
printf("\nEmployee age :-%ld",sortemp1[i].age);
printf("\n");
}
printf("\nPress Any Key To Go Back");
getch();
}
 }
void sortcode()
{
int i,j;
struct employee temp[max];
clrscr();
for(i=0;i<=num-1;i++)
{
sortemp1[i]=emp[i];
}
for(i=0;i<=num-1;i++)
{
for(j=0;j<=num-1;j++)
{
if(sortemp1[i].code<sortemp1[j].code)
{
temp[i]=sortemp1[i];
sortemp1[i]=sortemp1[j];
sortemp1[j]=temp[i];
}
}
}
for( i=0;i<=num-1;i++)
{
printf("\n Name   Code   Designation   Years(EXP)   Age");
printf("\n ------------------------------------------------------");
for( i=0;i<=num-1;i++)
{
printf("\n%s",sortemp1[i].name);
printf("\n%ld",sortemp1[i].code);
printf("\n%s",sortemp1[i].designation);
printf("\n%ld",sortemp1[i].exp);
printf("\n%ld",sortemp1[i].age);
printf("\n");
}
printf("\nPress Any Key To Go Back");
getch();
} }
void sortdes()
{
int i,j;
struct employee temp[max];
clrscr();
for(i=0;i<=num-1;i++)
{
sortemp1[i]=emp[i];
}
for(i=0;i<=num-1;i++)
{
for(j=0;j<=num-1;j++)
{
if(strcmp(sortemp1[i].designation,sortemp1[j].designation)<=0)
{
temp[i]=sortemp1[i];
sortemp1[i]=sortemp1[j];
sortemp1[j]=temp[i];
}
}
}
for( i=0;i<=num-1;i++)
{
printf("\n Name Code Designation Years(EXP) Age");
printf("\n ------------------------------------------------------");
for( i=0;i<=num-1;i++)
{
printf("\n%s",sortemp1[i].name);
printf("\n%ld",sortemp1[i].code);
printf("\n%s",sortemp1[i].designation);
printf("\n%ld",sortemp1[i].exp);
printf("\n%ld",sortemp1[i].age);
printf("\n");
}
printf("\nPress Any Key To Go Back");
getch();
}
 }
void sortage()
{
int i,j;
struct employee temp[max];
clrscr();
for(i=0;i<=num-1;i++)
{
sortemp1[i]=emp[i];
}
for(i=0;i<=num-1;i++)
{
for(j=0;j<=num-1;j++)
{
if(sortemp1[i].age<sortemp1[j].age)
{
temp[i]=sortemp1[i];
sortemp1[i]=sortemp1[j];
sortemp1[j]=temp[i];
}
}
}

 for( i=0;i<=num-1;i++)
{
printf("\n Name Code Designation Years(EXP) Age");
printf("\n ------------------------------------------------------");
for( i=0;i<=num-1;i++)
{
printf("\n%s",sortemp1[i].name);
printf("\n%ld",sortemp1[i].code);
printf("\n%s",sortemp1[i].designation);
printf("\n%ld",sortemp1[i].exp);
printf("\n%ld",sortemp1[i].age);
printf("\n");
}
printf("\nPress Any Key To Go Back");
getch();
} }
void sortexp()
{
int i,j;
struct employee temp[max];
clrscr();
for(i=0;i<=num-1;i++)
{
sortemp1[i]=emp[i];
}
for(i=0;i<=num-1;i++)
{
for(j=0;j<=num-1;j++)
{
if(sortemp1[i].exp<sortemp1[j].exp)
{
temp[i]=sortemp1[i];
sortemp1[i]=sortemp1[j];
sortemp1[j]=temp[i];
}
}
       }
     for( i=0;i<=num-1;i++)
{
printf("\n Name Code Designation Years(EXP) Age");
printf("\n ------------------------------------------------------");
for( i=0;i<=num-1;i++)
{
printf("\n%s",sortemp1[i].name);
printf("\n%ld",sortemp1[i].code);
printf("\n%s",sortemp1[i].designation);
printf("\n%ld",sortemp1[i].exp);
printf("\n%ld",sortemp1[i].age);
printf("\n");
}
printf("\nPress Any Key To Go Back");
getch();

}}

Now, 

 STEP 1:- Just copy the above code and paste it in the "Notepad".

 STEP 2:- Go to "File" or simple press alt + f and Press "Save as" and save it with " .c " extension for example :- "DatabaseInC.c" or "DatabaseInC.cpp" .

 STEP 3:- Now, Save it to the desired Location. I would Suggest save it to "BIN" Folder Most Probably it would be here " C:\TC\BIN " .

 STEP 4:- Open "Turbo C" or "Borland C" and Press "File" Option or simply Press " alt + f " then, Click open or Simply Press " f3 "and write the Path wherever you have saved the file.

 If you've followed all the Instruction mentioned above . The File Would be here " C:\TC\BIN " and search for the file " DatabaseInC.c " or " DatabaseInC.cpp " and hit enter.


Step 5 :- Run the Program by pressing  " alt + f9 " :)
Enjoy You've Just Created the Database In C Language. 
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