TY - CONF A1 - Jaakkola, Hannu A1 - Thalheim, Bernhard T1 - Visual SQL? High-Quality ER-Based Query Treatment KW - visual SQL KW - ER-Based Y1 - 2004 UR - https://opus4.kobv.de/opus4-UBICO/frontdoor/index/index/docId/1776 ER -