The DISTINCT operator is useful when used in conjunction with the COUNT function
a. True
b. False
Indicate whether the statement is true or false
True
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Discuss why units are lost during production
The Burdell Company has four distribution centers located at the location coordinates given as follows. The monthly demand at each center is also given
DC Coordinates Demand A (100, 150 ) 50 B (250, 250 ) 30 C (150, 150 ) 15 D (200, 300 ) 100 Management wants to build a new plant that would be located at the center of gravity of the four distribution centers. Which of the following options best represents the coordinates of the new plant location? A) x coordinate is greater than 150 but less than 170; y coordinate is greater than 210 but less than 230. B) x coordinate is greater than 150 but less than 170; y coordinate is greater than 230 but less than 250. C) x coordinate is greater than 170 but less than 190; y coordinate is greater than 210 but less than 230. D) x coordinate is greater than 170 but less than 190; y coordinate is greater than 230 but less than 250.
In the context of ensuring integrity of a database, a(n) _____ transaction is one that does not overload the DBMS
Fill in the blank(s) with correct word
In the context of the components of an expert system, a(n) _____ is similar to the model base component of a decision support system
A) user interface B) knowledge base C) inference engine D) explanation facility