Computers and Technology, 21.04.2020 20:52 joshuabm42407
1) Write expressions of relational algebra for the following queries draw the query trees for each and write the SQL statement: a. What PC models have a speed of at least 3.00 b. What the model numbers of all color printers c. Which manufacturer make laptops with at least 100 GB d. Find the model and price of all products (of any type) made by manufacturer "B" e. Find the manufacturers that sell laptops but not PC.
Answers: 3
Computers and Technology, 23.06.2019 02:50
Define a class named movie. include private fields for the title,year, and name of the director. include three public functions withprototypes void movie: : settitle(cstring); , voidmovie: : setyear(int); , void movie: : setdirector(string); . includeanother function that displays all the information about a movie.write a main() function that declares a movie object namedmyfavoritemovie. set and display the object's fields.this is what i have but know its wrong since it will notcompile: #include#includeusing namespace std; //class declarationclass movie{private: string movietitle ; string movieyear; string directorname; public: void settitle(string title); void setyear(string year); void setdirector(string director); void displayinfo(); }; //class implementationvoid movie: : settitle(string title){ movietitle = title; cout< < "what is the title of themovie? "< > temp; myfavoritemovie.settitle(temp); cout< < "enter movie year"< > temp; myfavoritemovie.setyear(temp); cout< < "enter director'sname"< > temp; myfavoritemovie.setdirector(temp); //display all the data myfavoritemovie.displayinfo(); system("pause"); return 0; this code is not entirely mine someone on cramster edited my firstcode but then i try manipulating the new code and i still get acompile error message : \documents\visual studio 2008\projects\movie\movie\movie.cpp(46) : error c2679: binary '< < ' : no operator found which takes aright-hand operand of type 'std: : string' (or there is no acceptableconversion)c: \program files (x86)\microsoft visual studio9.0\vc\include\ostream(653): could be'std: : basic_ostream< _elem,_traits> & std: : operator< < > (std: : basic_ostream< _elem,_traits> & ,const char *)w
Answers: 1
Computers and Technology, 24.06.2019 16:30
You may see the term faq on websites which stands for frequently asked questions this is an example of which type of mnemonic? a) poem b) acronym c) acrostic d) abbreviation ken has dipped many dark chocolate marshmallows (which you remember the metric system distance units in decreasing order: kilometers, hectometer, decameter, centimeter, millimeter) is an example of which type of mnemonic? a) poem b) acronym c) acrostic d) abbreviation !
Answers: 1
Computers and Technology, 25.06.2019 04:30
Which relativos possible when two tables share the same primary key? a.) one-to-one b.) one-to-many c.) many-to-one d.) many-to-many
Answers: 2
Computers and Technology, 25.06.2019 08:10
Which of the following statements is false? a. package access is rarely used. b. use the access modifier package to give a method or variable package access. c. classes in the same source file are part of the same package. d. if a program uses multiple classes from the same package, these classes can access each other's package access members directly through references to objects of the appropriate classes, or in the case of static members, through the class name.
Answers: 1
1) Write expressions of relational algebra for the following queries draw the query trees for each a...
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