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NPL (for NonProcedural Language) was a relational database language developed by T.D. Truitt et al. [1] [2] in 1980 for Apple II and, later, for MS-DOS.In general, a non-procedural language (also called a declarative language) requires the programmer to specify what the program should do, rather than (as with a procedural language) providing the sequential steps indicating how the program ...
Some researchers state that 4GLs are a subset of domain-specific languages. [1] [2] The concept of 4GL was developed from the 1970s through the 1990s, overlapping most of the development of 3GL, with 4GLs identified as "non-procedural" or "program-generating" languages, contrasted with 3GLs being algorithmic or procedural languages.
A procedural program is composed of one or more units or modules, either user coded or provided in a code library; each module is composed of one or more procedures, also called a function, routine, subroutine, or method, depending on the language. Examples of procedural languages include:
Language Original purpose Imperative Object-oriented Functional Procedural Generic Reflective Other paradigms Standardized; 1C:Enterprise programming language: Application, RAD, business, general, web, mobile: Yes No Yes Yes Yes Yes Object-based, Prototype-based programming No ActionScript: Application, client-side, web Yes Yes Yes Yes No No ...
A third-generation language improves over a second-generation language by having the computer take care of non-essential details. 3GLs are more abstract than previous generations of languages, and thus can be considered higher-level languages than their first- and second-generation counterparts.
The main feature of SQL (non-procedural) is also its drawback: control statements (decision-making or iterative control) cannot be used if only SQL is to be used.PL/SQL provides the functionality of other procedural programming languages, such as decision making, iteration etc.
Procedural languages generally use reserved words that define blocks, such as if, while, and for, to implement control flow, whereas non-structured imperative languages (i.e. assembly language) use goto and branch tables for this purpose.
C – a general-purpose programming language, initially developed by Dennis Ritchie between 1969 and 1973 at AT&T Bell Labs. These languages are classified as procedural paradigm. They directly control the step by step process that a computer program follows.