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backup dos command

== BACKUP ==
'''External - DOS 2.0 and above'''
:Backs up one or more files from one disk to another.

<pre>
BACKUP source destination-drive: [/S] [/M] [/A] [/F[:size]]
  [/D:date[/T:time]] [/L[:[drive:][path]logfile]]

  source             Specifies the file(s), drive, or directory to back up.
  destination-drive: Specifies the drive to save backup copies onto.
  /S                 Backs up contents of subdirectories.
  /M                 Backs up only files that have changed since the last
                     backup.
  /A                 Adds backup files to an existing backup disk.
  /F:[size]          Specifies the size of the disk to be formatted.
  /D:date            Backs up only files changed on or after the specified
                     date.
  /T:time            Backs up only files changed at or after the specified
                     time.
  /L[:[drive:][path]logfile]
                     Creates a log file and entry to record the backup
                     operation.
</pre>

Calling a Stored Procedure ( C connect 2 orcle) .......intrsting

Input Table

SQL> SELECT ename, empno, sal FROM emp ORDER BY sal DESC;

ENAME          EMPNO      SAL
---------- --------- --------
KING            7839     5000
SCOTT           7788     3000
FORD            7902     3000
JONES           7566     2975
BLAKE           7698     2850
CLARK           7782     2450
ALLEN           7499     1600
TURNER          7844     1500
MILLER          7934     1300
WARD            7521     1250
MARTIN          7654     1250
ADAMS           7876     1100
JAMES           7900      950
SMITH           7369      800

Stored Procedure

/* available online in file 'sample6' */
#include <stdio.h>
#include <string.h>

typedef char asciz;

EXEC SQL BEGIN DECLARE SECTION;
   /* Define type for null-terminated strings. */
   EXEC SQL TYPE asciz IS STRING(20);
   asciz  username[20];
   asciz  password[20];
   int    dept_no;    /* which department to query */
   char   emp_name[10][21];
   char   job[10][21];
   EXEC SQL VAR emp_name is STRING (21);
   EXEC SQL VAR job is STRING (21);
   float  salary[10];
   int    done_flag;
   int    array_size;
   int    num_ret;    /* number of rows returned */
   int    SQLCODE;
EXEC SQL END DECLARE SECTION;

EXEC SQL INCLUDE sqlca;

int print_rows();       /* produces program output      */
int sqlerror();         /* handles unrecoverable errors */

main()
{
   int i;

   /* Connect to Oracle. */
   strcpy(username, "SCOTT");
   strcpy(password, "TIGER");

   EXEC SQL WHENEVER SQLERROR DO sqlerror();

   EXEC SQL CONNECT :username IDENTIFIED BY :password;
   printf("\nConnected to Oracle as user: %s\n\n", username);

   printf("Enter department number: ");
   scanf("%d", &dept_no);
   fflush(stdin);

   /* Print column headers. */
   printf("\n\n");
   printf("%-10.10s%-10.10s%s\n", "Employee", "Job", "Salary");
   printf("%-10.10s%-10.10s%s\n", "--------", "---", "------");

   /* Set the array size. */
   array_size = 10;
   done_flag = 0;
   num_ret = 0;

   /* Array fetch loop - ends when NOT FOUND becomes true. */
   for (;;)
   {
      EXEC SQL EXECUTE
         BEGIN personnel.get_employees
            (:dept_no, :array_size, :num_ret, :done_flag,
            :emp_name, :job, :salary);
         END;
      END-EXEC;

      print_rows(num_ret);

      if (done_flag)
         break;
   }

   /* Disconnect from Oracle. */
   EXEC SQL COMMIT WORK RELEASE;
   exit(0);
}

print_rows(n)
int n;
{
   int i;

   if (n == 0)
   {
      printf("No rows retrieved.\n");
      return;
   }

   for (i = 0; i < n; i++)
      printf("%10.10s%10.10s%6.2f\n",
         emp_name[i], job[i], salary[i]);
}
sqlerror()
{
   EXEC SQL WHENEVER SQLERROR CONTINUE;
   printf("\nOracle error detected:");
   printf("\n% .70s \n", sqlca.sqlerrm.sqlerrmc);
   EXEC SQL ROLLBACK WORK RELEASE;
   exit(1);
}

Interactive Session

Connected to Oracle as user: SCOTT

Enter department number: 20

Employee  Job       Salary
--------  ---       ------
SMITH     CLERK     800.00
JONES     MANAGER   2975.00
SCOTT     ANALYST   3000.00
ADAMS     CLERK     1100.00
FORD      ANALYST   3000.00

---