Question: Database Management 2. What is integrit? . entity integrity for PK must not null, no duplicate . referential integrity if a foreign key exists in

Database Management Database Management 2. What is integrit? . entity integrity for PK

2. What is integrit? . entity integrity for PK must not null, no duplicate . referential integrity if a foreign key exists in a relation, either the FK relation or the FK value must be wholly null SQL statement for setting referential integrity ALTER TABLE roomTBL ADD FOREIGN KEY (hotelNo) REFERENCES hotelTBL(hotelNo)

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

Which of the following describes referential integrity? A primary key of a relational table must not contain a null value The value for a foreign key attribute must either be null or match one of the...

the following relational algebra questions based on tables S1 and S2 (below) Question 1 What is the output of S1 S2 ? The row identified by sid 22 The rows identified by sid 31 and 58 The row...

How do I write instructions as SQL code or make the changes as requested? (b) Violates referential integrity because DNUM=2 and there is no tuple in the DEPARTMENT relation with DNUMBER=2. We may...

Q14: TRUE or FALSE: - A Nave database user, is the user who works on database infrequently (when needed) ( ) - We may not using DBMS when it costs more than the benefits. ( ) - The conceptual data...

DMLab3 This lab is in two parts. The first part is worth 50 points and consists of 5 questions worth 10 points apiece from chapter 5 of the text. The second part consists of making a model of the...

The un-normalized elation to be modeled is: STUDENT(Name, Major, Nickname, EmailAddress, AdvisorNumber, AdvisorName, Club, ClubCost) 1.A student has exactly one name 2.A student has exactly on major...

Which of the statements listed below in an accurate interpretation of one or more of the participation cardinalities as depicted between the Sale Order and Shipment events in the following conceptual...

Database Managment 1) A view is an alias of an actual table; all the columns and rows are visible through either the table or the view. a. True b. False 2) One advantage of a view is that it can...

Please complete the following Together in one window of SQL management studio. Part 2 : Creating the COMPANY database schema using DDL and DML statements. Make sure to understand all the...

Octane (C8H18) is a component of gasoline. Complete combustion of octane yields H2O and CO2. Incomplete combustion produces H2O and CO, which not only reduces the efficiency of the engine using the...

Q5. Express following in term of derivatives (I) limsx0 |x+8x 8x (II) limsz0 8z (II) limsa0 d.x (IV) limsz- Sz0 8z a2, z+8z a2 (V) limsz0 8z

A capital budgeting technique that generates a decision rule and associated metric for choosing projects referred to as Multiple Choice NPV . PI . MIRR. IRR. Prex 2 6 of 3 0

solution with two constants of integration. use bessel's equation 3. A liquid level dynamic in a horizontal tank is presented as dh(t) Fin(t) - kh(t) (1) dt (2/2rh(t) h2(t)) where h(t) is liquid...

How can Federal jobs in the same GS Pay Grade be considered jobs of Comparable Worth?

What is the Salary Range Midpoint and how does it relate to the Pay Policy Line? For which analytic is it important?

How wide are Salary Structure Ranges?