When creating DB tables that contain foreign key references to other tables, you must: A first create the table in which the primary key is a foreign key B first create the table in which the foreign key is a primary key first remove all integrity constraints D) it does not matter, you are free to create any table first

When creating DB tables that contain foreign key references to other tables, you must: A first create the table in which the primary key is a foreign key B first create the table in which the foreign key is a primary key first remove all integrity constraints D) it does not matter, you are free to create any table first

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

how to Create three or more SQL Data Control Language (DCL) Statements using the Homework Database: EMPLOYEE, STORE, REGION, and SUPPLIER Database. Create a new user statement for the database. The user name should be based on yourself containing your name. Statements that grant privileges to the new user. Statements granting privileges to at least 2 of the tables in the assigned database Statements that revoke privileges to the new user. Statements revoking privileges to at least 2 of the tables in the assigned Database the home work data base: -- creating the RegionStore DataBase DROP DATABASE IF EXISTS RegionStore; CREATE DATABASE RegionStore; USE RegionStore; -- creating the Region table CREATE TABLE Region ( regionID VARCHAR(10), regionName VARCHAR(50), supervisor VARCHAR(50), CONSTRAINT PRIMARY KEY (regionID) ); -- creating the store table CREATE TABLE Store ( storeID VARCHAR (10), storeAddress VARCHAR (50), phone…
Compare between the following: Temporary table vs. View Assertion vs. Triggers
Create a table named "student" with the following columns/fields: 1. id - integer not null primary key and auto increment 2. name - string with max of 200 characters not null 3. birthdate - date allows null Enter your answer 2. Create a database named "enrollment" Enter your answer 3. Get all the columns/fields of the "student" table. Enter your answer 4. Update the name of the student to "John Doe" where its id is 10. Enter your answer 5. Modify the "student" table by adding "address" column/field as string and allows null. Enter your answer 6. Delete all the records in "student" table. Enter your answer 7. Delete a record in "student" table where its id is 1. Enter your answer 8. Get only the "name" and "birthdate" of the "student" table where its "name" starts with "Jo" Enter your answer
Describe primary data integrity constraints in SQL.
14. How many records are created when you apply a Cartesian join (Cross join) to the invoice and invoice items table? 1. The following diagram is a depiction of what type of join? a. Inner Join b. Full outer join C. Left join d. Right join 16. Select which of the following statements are true regarding inner joins. (Select all that apply) a. There is no limit to the number of table you can join with an inner join. b. Performance will most likely worsen with the more joins you make Inner joins retrieve all matching and nonmatching rows from a table d. Inner joins are one of the most popular types of joins use 17. Which of the following is true regarding Aliases? (Select all that apply.) a. Aliases are often used to make column names more readable b. SQL aliases are used to give a table, or a column in a table, a temporary name. An alias only exists for the duration of the query. 18. What is wrong with the following query? SELECT Customers.CustomerName, Orders.OrderID FROM LEFT JOIN ON…
What are the benefits of using a table in a database? write a brief remark regarding the value NULL?
Write a select statement for the following: Join all the tables of the lunches database together (Anything table starting with L_). Show all the columns of each table. To do this, modify the select statement in this section and add the three other tables to it. How many rows and columns are in this table?
dbms
Identify opportunities for using triggers in your database and write the appropriate DDL queries for them
Key to represent relationship between tables is called A. Primary key B. Secondary Key C. Foreign Key D. None of these
Define the term referential integrity constraint. Give an example of a referential integrity constraint for the tables you created for question 1.8.
Write a SQL script that performs the following. Creates an updatable view based on the employee table. The view must contain the following features Rename all of the columns Display all "manager" records Insert 5 new records into the base table (using the view) Display all the view records using the base table (to verify that the view performed the inserts)