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Draw a DFSA for identifiers that contain only letters and digits, where the identifier must have at least one letter, but it need not be the first character. Hint: everything to the left of the leftmost letter must be a digit.
Suppose a database has tables given below. Write the names and e-mail addresses for all customers who have had stove repair which cost more than $50.
Complete (i.e., reverse engineering) ER diagram below such that 4 relation schemas above are exactly result of a translation from the ERD to the relational model.
Input names of students from the user, terminated by ZZZ, and create a data file GRADES with records of the form.
To analyse a set of data, and write a memo, identifying and explaining your insights into the operation of Todd Restaurants.
Create a stored procedure that updates the members' balance in the membership table by correctly recording the current or outstanding balance for each customer.
Write a SELECT statement that returns three columns: InvoiceTotal From the Invoices table, 10% 10% of the value of InvoiceTotal.
Transform the tables into one or more tables in BCNF. State the primary keys, candidate keys, and referential integrity constraints.
Energy in the home, personal energy use and home energy efficiency and Efficient use of ‘waste' heat and renewable heat sources
Explain what is the purpose of Database? The purpose of a database is to store information about certain types of objects. Give an example of two related TABLES.
Estimate the height of the B+ tree. (Giving a range of heights is fine.) Also estimate the amount of memory needed to store the tree, including leaves but not including the posting lists themselves.
Explain the content of this document in natural language;Design the graph representation of document;
Using data mining, it is possible to gather information which has been buried that can be manipulated and cross indexed which could be a valuable information gathering technique for entities.
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