Therefore, it is important that every single record in a database has something to uniquely identify it and this is called the 'Primary Key' or sometimes the 'Key Field'. When you started school, you were given a 'student ID' or an 'office number' (primary key).
Ignoring any maintenance costs, asphalt is generally much cheaper to install than concrete. On average, the cost per square foot for asphalt will run between $2.50 to $4.00. Fluctuations in crude oil prices can cause fluctuations in asphalt prices but the price will remain around this range. Concrete, on the other hand, can run between $4.00 to $6.00 per square foot for basic installation and can cost more depending on different finishes and detail. Itâs not unheard of to have a stained concrete driveway with a smooth finish cost over $15.00 per square foot.
Making the world better, one answer at a time. The average cost of concrete is 20 dollars per linear foot. This price does not factor in the cost of framing the footing or labor. The final estimate will include all concrete needed for the project.ccording t â¦ o www.doityourself.com a yard of concrete will cost about $75.00 so a cubic foot will cost you $75/27, which would be about $2.78 per cubic foot. 1 foot of concrete is a very small volume so you will probably be charged for a minimum quantity which will be more that the cost of 1 foot.