Defining the following keys is necessary. c) Proposed key
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Defining the following keys is necessary.
c) Proposed key
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- Defining the following keys is necessary. a) Principal keyDefining the following keys is necessary. c) Substitute key( Please answer this question immediately I do not have time ) Use the following table to answer the questions below: Table name: Books Column Name Role Data Type Length Constraint bookID Stores the ID of a book Number 5 Primary key bookTitle Stores the title of a book Varchar2 50 - bookISBN Stores the ISBN of a book Number 13 Cannot be null and duplicated publicationDate Store the publication date of a book Date - Cannot be null bookPrice Stores the price of a book Number 2,2 Cannot be null a. Write in SQL a command that creates the table Books according to the above description b. Write in SQL a statement that adds a new column named publisherID of type Char(10). This column should be defined as a foreign key that relates the table Books to the table Publisher c. Write in SQL a command that deletes the books that are published before 20-Aug-2010 d. Write a SQL query that displays the number of books that are published in the year 2018 e. Write in SQL a…
- (check all that apply) Which of the following is true about constraint names?A) it can be used for DBA to identify a constraint easilyB) Two constraints can have the same name if they are located in two different tablesC) All constraints must be named uniquelyD) Constraint names are case sensitiveDisjoint restrictions overlap?Using truth table and functions please complete task 3. Schematic truth table should match). Must have 3 ins and 7 outs. Will upvote!(:
