Computers and Technology, 23.10.2019 18:00 idcatall5
The primary key attributes are underlined, and the domain of each attribute is listed after the attribute name. thus, sid is the primary key for suppliers, pid is the primary key for parts, and sid and pid together form the primary key for catalog. attribute sid in catalog is a foreign key that refers to the primary key sid of suppliers and pid in catalog is a foreign key that refers to the primary key pid of parts. the catalog relation lists the prices charged for parts by suppliers.
state what the following query computes.
0. πcity (πpid (σ color = 'green' (parts) ) * σ cost> 50 (catalog) * πsid, city (suppliers) )
write the following queries in relational algebra.
1. find the names of parts for which there is some supplier
2. find the names of parts supplied by suppliers who are at 1 central ave.
Answers: 2
Computers and Technology, 23.06.2019 07:00
1. you have a small business that is divided into 3 departments: accounting, sales, and administration. these departments have the following number of devices (computers, printers, etc.): accounting-31, sales-28, and administration-13. using a class c private network, subnet the network so that each department will have their own subnet. you must show/explain how you arrived at your conclusion and also show the following: all available device addresses for each department, the broadcast address for each department, and the network address for each department. also, determine how many "wasted" (not usable) addresses resulted from your subnetting (enumerate them).
Answers: 3
Computers and Technology, 23.06.2019 17:00
1. which of the following is not an example of an objective question? a. multiple choice. b. essay. c. true/false. d. matching 2. why is it important to recognize the key word in the essay question? a. it will provide the answer to the essay. b. it will show you a friend's answer. c. it will provide you time to look for the answer. d. it will guide you on which kind of answer is required.
Answers: 1
Computers and Technology, 23.06.2019 18:00
Which is a possible benefit of having a good credit history? having a checking account low interest rate on a car loan high interest rate on a credit card offer bankruptcy
Answers: 1
Computers and Technology, 24.06.2019 14:30
Ahousehold consists of a married couple and their twin five-year old daughters. the couples children had no income and lived with their parents all of last year. how many exemptions can the couple claim on last years tax return or they file with the “ married filing jointly “ status? a. 4 b. 5 c. 3 d. 2
Answers: 1
The primary key attributes are underlined, and the domain of each attribute is listed after the attr...
English, 16.10.2020 15:01
English, 16.10.2020 15:01
History, 16.10.2020 15:01
Health, 16.10.2020 15:01
English, 16.10.2020 15:01
History, 16.10.2020 15:01
Computers and Technology, 16.10.2020 15:01
French, 16.10.2020 15:01
English, 16.10.2020 15:01
Mathematics, 16.10.2020 15:01
Biology, 16.10.2020 15:01
Social Studies, 16.10.2020 15:01
Arts, 16.10.2020 15:01