design approach for ERP database -


i must re-build erp app did 7 years ago. old database design was: 1 document -> 1 table. example: invoices have there table.

i search other's database design, such openbravo , did similar.

this kind of design has advantages:

  • makes easy search (directly) database
  • in case of mistakes, table involved
  • other...

but nowadays things different. databases mongodb scene make me doubt. other possibility, make 1 big table kind of documents. so, example, using single table inheritance can store different document data on own.

this approach dive me 20 tables 1 childs. final question is:

should design one-document/one-table or should go oo design 1 general table?

note: commercial/financial documents, db has other tables other concepts.

i don't think able precise answer other this:

it boils down needs. need choose database software , technology according needs. there many , each tool not @ of them. points need think about:

  • how data need store ? gigabytes ? hundreds of gigabytes ? terabytes ?
  • how many users need access database @ same time ?
  • do need able / replicate data across multiple servers ?
  • is data structured or more flexible ?
  • what experience of company various database software ?
  • how company going invest in project ?
  • do need support acid transactions ?

those questions should answered before pick tool "because know it". erp piece of software critical enterprise suggest give lot of thought specific technologies considering , why making onto list. when know should pick tool best fits criteria.


Comments

Post a Comment

Popular posts from this blog

SPSS keyboard combination alters encoding -

my question not have programming practical issue on spss. accident keyword combination cannot remember because did not intend press changed encoding in spss , text in data in different language english shown small boxes. nevertheless, when kind of analysis performed different language text shown in output. does know reason? tried change encoding did not produce result. first, @ edit > options , see whether setting unicode or locale. might fix it. if have text in multiple languages, want unicode. otherwise, may have specific locale set wrong. can change set locale, need know locale want use.
Read more

Add new record to the table by click on the button in Microsoft Access -

in ms access form want implement separate button, adds new record table. in order added button , attached button event: private sub btnaddrec_click() refresh codecontextobject on error resume next docmd.gotorecord , , acnewrec if err.number <> 0 btnaddrec.enabled = false end if end end sub everything ok when open window , click btnaddrec button, problem when first of perform navigation through existed records , after click on button. got runtime error: 2105: «you can't go specified record. may @ end of recordset» . how solve issue, need have ability add new record on click on specific button, no matter, have walked or not walked through records before. thanks. i created simple form field call description (and autonumber) , created button code follows click event. filled number of records , navigated through them, clicked addnewrec button. form navigated new record without issues. able click addnewrec button directly after
Read more

javascript - jQuery .height() return 0 when visible but non-0 when hidden -

i have problem here right opposite others: in jquery cannot height of element when it's visible, when hidden. have html code: <div id="filtering-filter-holder"> <div id="filtering-filter-holder-inner"></div> </div> basic css it: #filtering-filter-holder { display: none; position: absolute; width: 420px; min-height: 100px; padding: 5px 5px 5px 5px; background-color: #ffffff; border: 1px solid #164372; } and finally, js in document.ready(): $('div.filtering-filter-headline').mouseenter(function() { var el = $(this).parent().find('div.filtering-filter-content'); if ($('div#filtering-filter-holder').is(':visible')) { $('div#filtering-filter-holder-inner').stop(true, true).fadeout(300, function() { $('div#filtering-filter-holder-inner').html($(el).html()); var height = $('div#filtering-filter-holder-inner&#
Read more