00697nam a2200217Ia 450000500170000000800410001704000180005804100080007608200210008410000230010524500590012825000120018726000580019930000290025765000450028665000310033165000400036265000230040265000310042565000230045620241212111026.0210716s1984    xx            000 0 und d  cAIMIT LIBRARY  aeng  a005.74 22bULLJ  aUllman, Jeffrey D.  aPrinciples of database systems /cBy Jeffrey O Ullman.  a2nd ed.  aNew Delhi :bGalgotia Publications Pvt Ltd. ,c1984 .  avii, 484p. ;bPBc24 cm.  aIntroduction to database system concepts  aPhysical data organization  aNetwork model and the DBTG proposal  aHierarchical model  aRelational query languages  aQuery optimization