What is the difference between a key and a superkey?
Question:
What is the difference between a key and a superkey?
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answer rating: 75% (8 reviews)
A candidate key is a set of columns that uniquely identifies rows and that contains no sma...View the full answer
Answered By
Sandra Dimaala
Sandra from Philippines ,LICENSED PROFESSIONAL TEACHER.
Teachers are our nation builders—the strength of every profession in our country grows out of the knowledge and skills that teachers help to instill in our children. And, as a nation, we must do much, much more to fully appreciate and support their work.
0.00
0 Reviews
10+ Question Solved
Related Book For
Fundamentals Of Database Systems
ISBN: 9780133970777
7th Edition
Authors: Ramez Elmasri, Shamkant Navathe
Question Posted:
Students also viewed these Computer science questions
-
What is the difference between a key benefit statement and a support claims statement?
-
What is the difference between a refrigerator and a heat pump?
-
What is the difference between a salary allowance for allocating profit among partners and salary expense? Between an interest allowance and interest expense?
-
Jerome Neeson is a shareholder in Gourmet Chefs Inc., a company that owns and operates a test kitchen in a large metropolitan area. The company is involved in a number of businesses, including...
-
Chapman et al. (1997) interviewed 68 pregnant inner city women and their male partners twice during their pregnancy, once between three and six months into the pregnancy and again between six and...
-
During lunch, the director of the Streets and Parkways Department of Thor City made the following comment: For the past 10 years, I have deliberately overstated my labor and equipment needs by 20...
-
From the point of view of each observer in Figure \(6.5,\) (a) is the energy of each cart constant? (b) Is the isolated system containing cart 1 closed? (c) Is the isolated system containing cart 2...
-
Kinokawa Consultants Companys trial balance on December 31, 2014, follows. The following information is also available: a. Ending inventory of office supplies, $86 b. Prepaid rent expired, $700 c....
-
1. Define ADT (Abstract Data Type)? 2. Mention the features of ADT.? 3. Define List ADT? 4. What are the ways of implementing linked list? 5. What are the types of linked lists?
-
Base-promoted hydrolysis of methyl mesitoate occurs through an attack on the alcohol carbon instead of the acyl carbon: (a) Can you suggest a reason that accounts for this unusual behavior? (b)...
-
Why are duplicate tuples not allowed in a relation?
-
Why do we designate one of the candidate keys of a relation to be the primary key?
-
In Problems 5768, solve each equation in the real number system. 2x + 3x + 2x + 3 = 0
-
1. Calculate the present value of receiving a payment of $14,000 in 5 years with a discount rate of 7.5% a. Calculate the future value of the above scenario. 2. Calculate the present value of a...
-
Emily's company has a health insurance plan which she paid $14,000 for the year. During the year, she also paid $4100 in medical expenses through an HSA account. The entire family is covered on this...
-
John is making a decision whether goinf forward with a project which has NPV of $2.5 million, operating for 6.75 year or another second project. The second project has the similar overall risk with...
-
Veronica decides to purchase stocks of two firms: A and B using her $200,000 cash. The market price for stock A is $80 and for B is $50. The expected return for A is 15% (25% for B) and the standard...
-
Consider a T-bond maturing on December 31,2028 with coupon payments on December 31 and June 30 every year. Assume that the bond has $1000 par value, 4% coupon rate, and YTM = 5%. The bond is traded...
-
Noninvertible 2 ( 2 Matrices Prove that for A is not invertible if ad = be? %3D
-
Teasdale Inc. manufactures and sells commercial and residential security equipment. The comparative unclassified balance sheets for December 31, 2015 and 2014 are provided below. Selected missing...
-
If we let n denote the size of set S, and m denote the size of set T, what would be the running time of the operation S.addAll(T), as implemented on page 446, if both sets were implemented as skip...
-
Give a description, in pseudocode, for implementing the retainAll method for the set ADT, using only the other fundamental methods of the set.
-
Give a description, in pseudocode, for implementing the removeAll method for the set ADT, using only the other fundamental methods of the set.
-
Explore a case where employees feel demotivated due to limited career growth opportunities. How can HR create a career development framework that motivates employees to excel and grow within the...
-
Sleep Tight, Inc., manufactures comforters. The estimated inventories on January 1 for finished goods, work in process, and materials were $40,000, $31,000, and $28,000, respectively. The desired...
-
BMX Company has one employee. FICA Social Security taxes are 6.2% of the first $137,700 paid to its employee, and FICA Medicare taxes are 1.45% of gross pay. For BMX, its FUTA taxes are 0.6% and SUTA...
Study smarter with the SolutionInn App