I am looking an OOTB solution, i need to send alert or create any workflow in Sharepoint des

You want to trigger workflow when item count is 100.

You can trigger workflow through javascript also.Through soap concept.Just googled .

Other wise i will share with you.

Please share.

I have a scenario, where i need to trigger the workflow when the amount of column reach the certain level.

Hi AbdulAzizFarooqi,

Do you want to count list items or list columns?

If it is list items, we can create a SharePoint Designer workflow like this (Set to start when new item is added automatically).

Wait for ID to not blank,
If ID equals 100,
Send an email.

To get count of list columns, add the script to foldNew.aspx page (in layout folder on SharePoint Server). Change on layout page will affect all site collections, so please add a condition so that it only applies to certain site or list.)
http://www.c-sharpcorner.com/UploadFile/anavijai/get-the-field-name-from-the-specified-view-in-the-sharepoint/

Thanks & Regards,
Emir