Help fixing my database script Post: 302867163

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Homework and Emergencies Homework & Coursework Questions Help fixing my database script Post 302867163 by gamernerd101 on Wednesday 23rd of October 2013 02:35:59 PM

10-23-2013

Registered User

Help fixing my database script

1. The problem statement, all variables and given/known data:
I need help I get a variant of syntax errors when compiling my script to maintain a database. It's a simple database meant to create/view/maintain vehicles.

2. Relevant commands, code, scripts, algorithms:
my if statements have many syntax errors and I'm lost as to why. One key lines is line 8 my first if statement. Thanks in advance.

3. The attempts at a solution (include all code and scripts):

Code:

#! /bin/bash
# Automobile database

db=arg1
command=arg2
case $db in
    #create:
if [ -f "$db" ]; then
echo "DATABASE EXSISTS"

 if [ $arg3 != "" ]
 echo $arg3 > db

else
echo "Automobile Database" > db
echo "New database created"
fi
  esac

#add

read -p "Make of the car: " make

read -p "Model of the car: " model

read -p "Year of the car: " year

read -p "Color of the car: " color


if $year < 1870 || $year > 2020
echo "Error with $year"
fi
echo "$make, $model, $year, $color" >> db
echo "Successfully added a record to the database"

case $arg3:
 max=$( wc -l db )
 #all:
 cat db

 if $arg4 > $max
 echo "Error"
 fi
 sed -ne "1p;arg4p" db

#range:
if $arg4 > $max || $arg5 > $max || $arg4 > $arg5
error
fi
sed -ne "1p;arg4,arg5p" $db
esac



#delete:
        case $arg3:
        max=$( wc -l db )
      sed -ie '2,$d' db
     single:
     if $arg4 > $max
     echo "error"
     fi

     sed -ie "$arg4d" db


     range:
     if $arg4 > $max || $arg5 > $max || $arg4 > $arg5
           echo "Error"
           fi
     sed -ie "arg4,arg5d" db
esac

4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
NIU, dekalb il USA, Ege, CSCI 330

Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).

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LEARN ABOUT CENTOS

drop_database

DROP 
DATABASE(7)					  PostgreSQL 9.2.7 Documentation					  DROP DATABASE(7)

NAME

       DROP_DATABASE - remove a database

SYNOPSIS

       DROP DATABASE [ IF EXISTS ] name

DESCRIPTION

       DROP DATABASE drops a database. It removes the catalog entries for the database and deletes the directory containing the data. It can only
       be executed by the database owner. Also, it cannot be executed while you or anyone else are connected to the target database. (Connect to
       postgres or any other database to issue this command.)

       DROP DATABASE cannot be undone. Use it with care!

PARAMETERS

       IF EXISTS
	   Do not throw an error if the database does not exist. A notice is issued in this case.

       name
	   The name of the database to remove.

NOTES

       DROP DATABASE cannot be executed inside a transaction block.

       This command cannot be executed while connected to the target database. Thus, it might be more convenient to use the program dropdb(1)
       instead, which is a wrapper around this command.

COMPATIBILITY

       There is no DROP DATABASE statement in the SQL standard.

SEE ALSO

       CREATE DATABASE (CREATE_DATABASE(7))

PostgreSQL 9.2.7						    2014-02-17							  DROP DATABASE(7)