Describe Application programming interface?
Application Programming Interface - Commercial SQL implementations take one of the two primary techniques for involving SQL in a programming language - embedded SQL and application program interface (API). In the application program interface approach, the program communicates along with the RDBMS using a set of functions known as the Application Program Interface (API). The program passes the SQL statements to the RDBMS using API calls and uses API calls to retrieve the results. In these techniques, the precompiler is not needed.