Using SQLite to maintain your monthly bills.

2010-08-24 1140 words 6 mins read

Linux

I was looking for a small application to maintain my every month bills. The application had to be small and script-able. I basically wanted to keep track of the bills that have been generated and pending payment and the bills that have been paid.

First we will create the <a class="zem_slink" title="Database" rel="wikipedia" href="http://en.wikipedia.org/wiki/Database">database schema with the following command:

  <td>
    <div class="text codecolorer">
      CREATE TABLE bills(name varchar(20), due_dt text, p_dt text, amount integer);
    </div>
  </td>
</tr>

So, I built on the knowledge gathered on <a class="zem_slink" title="SQLite" rel="homepage" href="http://sqlite.org/">SQLite. And here is a small script that I wrote:

  <td>
    <div class="bash codecolorer">
      <span class="co0">#!/bin/bash -</span><br /> <span class="co0">#===============================================================================</span><br /> <span class="co0">#</span><br /> <span class="co0">#          FILE:  bills.sh</span><br /> <span class="co0">#</span><br /> <span class="co0">#         USAGE:  ./bills.sh</span><br /> <span class="co0">#</span><br /> <span class="co0">#   DESCRIPTION:  Complete bill management</span><br /> <span class="co0">#</span><br /> <span class="co0">#       OPTIONS:  ---</span><br /> <span class="co0">#  REQUIREMENTS:  ---</span><br /> <span class="co0">#          BUGS:  ---</span><br /> <span class="co0">#         NOTES:  ---</span><br /> <span class="co0">#        AUTHOR:  <a class="zem_slink" title="Amit Agarwal" rel="homepage" href="http://amit-agarwal.co.in">Amit Agarwal</a> (AKA), <a class="linkification-ext" title="Linkification: mailto:amit.agarwal@amit-agarwal.co.in" href="mailto:amit.agarwal@amit-agarwal.co.in">amit.agarwal@amit-agarwal.co.in</a></span><br /> <span class="co0">#       COMPANY:  Individual</span><br /> <span class="co0">#       VERSION:  1.0</span><br /> <span class="co0">#       CREATED:  08/12/2010 08:28:05 AM <a class="zem_slink" title="Indian Standard Time" rel="geolocation" href="http://maps.google.com/maps?ll=23.1827777778,75.7772222222&spn=0.1,0.1&q=23.1827777778,75.7772222222%20%28Indian%20Standard%20Time%29&t=h">IST</a></span><br /> <span class="co0">#      REVISION:  ---</span><br /> <span class="co0">#===============================================================================</span><br /> <br /> <span class="co0">#Directory where you created the file.</span><br /> <span class="re2">dir</span>=<span class="st0">"<span class="es2">$HOME</span>/Bills"</span><br /> <br /> <span class="co0">#The file that will be used as schema.</span><br /> <br /> <span class="re2">file</span>=bills<br /> <br /> <span class="co0">#The table that you created above.</span><br /> <br /> <span class="re2">table</span>=bills<br /> <br /> <span class="co0">#Here are the names of the accounts. Dont use the first one.</span><br /> <span class="re2">names</span>=<span class="br0">&#40;</span>Junk A B C D E<span class="br0">&#41;</span><br /> <br /> <span class="co0">#Here are the respective dates.</span><br /> <span class="re2">due_dts</span>=<span class="br0">&#40;</span><span class="nu0"></span> 01 02 03 04 05<span class="br0">&#41;</span><br /> <br /> <span class="re2">menu_items</span>=<span class="br0">&#40;</span><br /> <span class="st0">"1. View all pending"</span><br /> <span class="st0">"2. Make payment"</span><br /> <span class="st0">"3. Add pending payment"</span><br /> <span class="st0">"4. Display the Schema"</span><br /> <span class="br0">&#41;</span><br /> <span class="re2">menu_function</span>=<span class="br0">&#40;</span> display_pending make_pay insert_due display_schema<span class="br0">&#41;</span><br /> <br /> <span class="co0">#===  FUNCTION  ================================================================</span><br /> <span class="co0">#          NAME:  display_menu</span><br /> <span class="co0">#   DESCRIPTION:  Display the menu</span><br /> <span class="co0">#    PARAMETERS:</span><br /> <span class="co0">#       RETURNS:</span><br /> <span class="co0">#===============================================================================</span><br /> display_menu <span class="br0">&#40;</span><span class="br0">&#41;</span><br /> <span class="br0">&#123;</span><br /> <span class="kw1">for</span> i <span class="kw1">in</span> <span class="sy0">`</span><span class="kw2">seq</span> <span class="nu0"></span> <span class="co1">${#menu_items[@]}</span><span class="sy0">`</span><br /> <span class="kw1">do</span><br /> <span class="kw3">echo</span> <span class="co1">${menu_items[$i]}</span><br /> <span class="kw1">done</span><br /> <span class="br0">&#125;</span>    <span class="co0"># ----------  end of function display_menu  ----------</span><br /> <br /> <span class="co0">#===  FUNCTION  ================================================================</span><br /> <span class="co0">#          NAME:  insert_due</span><br /> <span class="co0">#   DESCRIPTION:  Insert a pending payment</span><br /> <span class="co0">#    PARAMETERS:</span><br /> <span class="co0">#       RETURNS:</span><br /> <span class="co0">#===============================================================================</span><br /> insert_due <span class="br0">&#40;</span><span class="br0">&#41;</span><br /> <span class="br0">&#123;</span><br /> <span class="re2">mn</span>=$<span class="br0">&#40;</span><span class="kw2">date</span> +<span class="sy0">%</span>m<span class="br0">&#41;</span><br /> <span class="kw1">for</span> i <span class="kw1">in</span> <span class="sy0">`</span><span class="kw2">seq</span> <span class="nu0">1</span> <span class="co1">${#names[@]}</span><span class="sy0">`</span><br /> <span class="kw1">do</span><br /> <span class="kw3">echo</span> <span class="re1">$i</span> <span class="co1">${names[$i]}</span><br /> <span class="kw1">done</span><br /> <span class="kw2">read</span> <span class="re5">-p</span> <span class="st0">"Enter selection :: "</span> selection<br /> <span class="kw2">read</span> <span class="re5">-p</span> <span class="st0">"Enter the amount ::"</span> amt<br /> <span class="kw1">if</span> <span class="br0">&#91;</span> <span class="co1">${due_dts[$selection]}</span> -le  <span class="sy0">`</span><span class="kw2">date</span> +<span class="st0">"%d"</span><span class="sy0">`</span> <span class="br0">&#93;</span><br /> <span class="kw1">then</span><br /> <span class="re2">mn</span>=$<span class="br0">&#40;</span><span class="kw3">echo</span> <span class="re1">$mn</span> <span class="sy0">|</span><span class="kw2">sed</span> <span class="co3">\'</span>s<span class="sy0">/</span>^<span class="nu0"></span><span class="sy0">*//</span><span class="co3">\'</span><span class="br0">&#41;</span><br /> <span class="kw3">let</span> <span class="re2">mn</span>=<span class="re1">$mn</span>+<span class="nu0">1</span><br /> <span class="br0">&#91;</span> <span class="re1">$mn</span> <span class="re5">-le</span> <span class="nu0">9</span> <span class="br0">&#93;</span> <span class="sy0">&</span>amp;<span class="sy0">&</span>amp; <span class="re2">mn</span>=<span class="st0">"0<span class="es2">$mn</span>"</span><br /> <span class="kw3">echo</span> <span class="re1">$mn</span><br /> <span class="kw1">fi</span><br /> <span class="re2">dd</span>=$<span class="br0">&#40;</span><span class="kw3">echo</span> <span class="sy0">`</span><span class="kw2">date</span> +<span class="st0">"%Y-"</span><span class="sy0">`</span><span class="re1">$mn</span>-<span class="co1">${due_dts[$selection]}</span> 00:00:00<span class="br0">&#41;</span><br /> <br /> <span class="kw3">echo</span> <span class="st0">"insert into <span class="es2">$table</span> values ("</span><span class="co1">${names[$selection]}</span><span class="st0">", "</span><span class="re1">$dd</span><span class="st0">", "</span><span class="st0">", "</span><span class="re1">$amt</span><span class="st0">");"</span><span class="sy0">|</span>sqlite3 <span class="re1">$file</span><br /> <span class="br0">&#125;</span><br /> <br /> <span class="co0">#===  FUNCTION  ================================================================</span><br /> <span class="co0">#          NAME:  display_schema</span><br /> <span class="co0">#   DESCRIPTION:  Display the schema for the table</span><br /> <span class="co0">#    PARAMETERS:</span><br /> <span class="co0">#       RETURNS:</span><br /> <span class="co0">#===============================================================================</span><br /> <br /> display_schema <span class="br0">&#40;</span><span class="br0">&#41;</span><br /> <span class="br0">&#123;</span><br /> <span class="kw3">echo</span> <span class="st0">".schema <span class="es2">$table</span>"</span><span class="sy0">|</span>sqlite3 <span class="re1">$file</span><br /> <span class="br0">&#125;</span>    <span class="co0"># ----------  end of function display_schema  ----------</span><br /> <br /> <span class="co0">#===  FUNCTION  ================================================================</span><br /> <span class="co0">#          NAME:  make_pay</span><br /> <span class="co0">#   DESCRIPTION:  Update the payment in the database</span><br /> <span class="co0">#    PARAMETERS:</span><br /> <span class="co0">#       RETURNS:</span><br /> <span class="co0">#===============================================================================</span><br /> make_pay <span class="br0">&#40;</span><span class="br0">&#41;</span><br /> <span class="br0">&#123;</span><br /> <span class="kw3">echo</span> <span class="st0">"Select one of the following :"</span><br /> <span class="kw1">for</span> i <span class="kw1">in</span> <span class="sy0">`</span><span class="kw2">seq</span> <span class="nu0">1</span> <span class="co1">${#names[@]}</span><span class="sy0">`</span><br /> <span class="kw1">do</span><br /> <span class="kw3">echo</span> <span class="re1">$i</span> <span class="co1">${names[$i]}</span><br /> <span class="kw1">done</span><br /> <span class="kw2">read</span> <span class="re5">-p</span> <span class="st0">"Enter selection :: "</span> selection<br /> <span class="re2">dd</span>=$<span class="br0">&#40;</span><span class="kw3">echo</span> <span class="sy0">`</span><span class="kw2">date</span> +<span class="st0">"%Y-%m-%d %H:%M:%S"</span><span class="sy0">`</span><span class="br0">&#41;</span><br /> <br /> <span class="kw3">echo</span> <span class="st0">"update <span class="es2">$table</span> set p_dt="</span><span class="re1">$dd</span><span class="st0">" where name="</span><span class="co1">${names[$selection]}</span><span class="st0">" and p_dt="</span><span class="st0">";"</span><span class="sy0">|</span>sqlite3 <span class="re1">$file</span><br /> <span class="br0">&#125;</span>    <span class="co0"># ----------  end of function make_pay  ----------</span><br /> <br /> <span class="co0">#===  FUNCTION  ================================================================</span><br /> <span class="co0">#          NAME:  display_pending</span><br /> <span class="co0">#   DESCRIPTION:  Display all the pending payments</span><br /> <span class="co0">#    PARAMETERS:</span><br /> <span class="co0">#       RETURNS:</span><br /> <span class="co0">#===============================================================================</span><br /> display_pending <span class="br0">&#40;</span><span class="br0">&#41;</span><br /> <span class="br0">&#123;</span><br /> <span class="kw3">echo</span> <span class="st0">"select name,amount,due_dt from <span class="es2">$table</span> where p_dt="</span><span class="st0">";"</span><span class="sy0">|</span>sqlite3 <span class="re1">$file</span> <span class="sy0">|</span> <span class="kw2">sed</span> <span class="re5">-e</span> <span class="co3">\'</span>s<span class="sy0">/|/</span>\\t\\t--<span class="sy0">/</span>g<span class="co3">\'</span> <span class="re5">-e</span> <span class="co3">\'</span>s<span class="sy0">/</span>00:.<span class="sy0">*//</span><span class="co3">\'</span><br /> <span class="br0">&#125;</span>    <span class="co0"># ----------  end of function display_pending  ----------</span><br /> <br /> <span class="kw3">cd</span> <span class="re1">$dir</span><br /> display_menu<br /> <span class="kw2">read</span> <span class="re5">-p</span> <span class="st0">"Please make a selection :: "</span> input<br /> <span class="br0">&#40;</span><span class="br0">&#40;</span>input--<span class="br0">&#41;</span><span class="br0">&#41;</span><br /> <span class="kw3">eval</span> <span class="co1">${menu_function[$input]}</span>
    </div>
  </td>
</tr>

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Hope this will save you the effort to write a new application. Feel free to use this program/application. Modify this or whatever. If you are distributing this, please give due credit.

How to dump out SQL from an SQLite database (posterous.mclov.in)
SQLabs announces SQLiteManager 3.5 – Powerful SQlite Database Manager (themactrack.com)
Using SQLite (oreilly.com)
Mongrel2 Sqlite3 Config System Working (sheddingbikes.com)

$\"Enhanced$

Tags: Application programming interface Database Database engine Server (computing) sql SQL-92 SQLite Tools

2010/08/21 SQLite – simple use in scripts
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Authored By Amit Agarwal

Amit Agarwal, Linux and Photography are my hobbies.Creative Commons Attribution 4.0 International License.

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Authored By Amit Agarwal