The scope of SQL includes data query, data manipulation (insert, update and delete), data definition (schema creation and modification), and data access control. Although SQL is often described as, and to a great extent is, a declarative language , it also includes procedural elements. SQL was one of the first commercial languages for Edgar F. Codd's relational model, as described in his influential 1970 paper, A Relational Model of Data for Large Shared Data Banks.
uk â /ËkÉs.tÉªÅ/ us â /ËkÉË.stÉªÅ/. âº a calculation of the future cost of something such as a possible product: We'll need accurate costings before we can agree to fund the project.
Price can be understood as the money or amount to be paid, in order to get something. Cost is the amount incurred in the production of goods, i.e. it is the money value of the resources involved in producing something. Conversely, value implies the utility of worth of the commodity of service for an individual.