Grehan R. Building SQL front ends // Byte.-1993.-Vol.18, N 12.-P. 238-242, 244, 246.
    = Windows- SQL. 
      .  
       
    - 
    4 SQL: ObjectView
    2.1 ( KnowledgeWare), ObjectVision Pro 2.0 (Borland), PowerBuilder 3.0
    (PowerSoft), SQLWindows 4.0 (Gupta). Borland
    (495 USD). 3 2–3 . USD .
    (BTrieve, DB2, dBASE ),
    (/++, Basic ).
    .