Relational DBMS. Motivating Questions From last time: Is MS Excel a DBMS? What makes some databases relational, while others are not? Why do so many people use them?. RDBMS: Basic Principles. Based on a variant of n-ary relations Relations are the main data structure
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(1) For each of the following tuples, states which, if any, of the integrity rules are violated when they are added to the SALES_ORDER relation:
<14, 1/6/97, C45> <15, 1/7/97, null>
<16, 5/7/97, C52> <17, 10/7/98, null>