Question: What does the following notation mean: R 2 . { A 2 } times 2 2 8 6 ; R 1 . { A

What does the following notation mean: R2.{A2} \times 2286; R1.{A1}
A2 is a partial key for the weak entity R2 and is identified by A1
All values of R2.A2 must be in the set of values found in R1.A1
All tuples in R2 are a subset of R1
A2 is a key attribute for the candidate key A1
What does the following notation mean: R2.{A2} \times 2286; R1.{A1} A2

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!

Q:

Name:_____________________________ HP340: Statistical Methods, Fall 2016 Due Date: Nov 28, 2016 Homework #8 Instructions: Clearly circle the letter of the best answer for multiple-choice questions...

Q:

Suppose that T (0,00), that (Wtheo,r is a standard Brownian motion and that the price of a stock at time t is given by 2 for anyt [O, for t E 0,T], where So 0 is the current price of the stock, r > 0...

Q:

= 2 Suppose that TE (0,00), that (Wt)re(0,7) is a standard Brownian motion and that the price of a stock at time t is given by 02 Se = So exp{(r = )t +oWi} - , for any te (0,T], for t e [0,T], where...

Q:

$FL2@(#) IBM SPSS STATISTICS 64-bit Macintosh 22.0.0.0 ################P#########Y@16 Nov 1611:00:04 ###########################SUBJECTI########################DRUGDOSE#############...

Q:

Name:_____________________________ HP340: Statistical Methods, Fall 2016 Due Date: Nov 28, 2016 Homework #8 Instructions: Clearly circle the letter of the best answer for multiple-choice questions...

Q:

Each J2 requires 6 minutes of machine time, 90 minutes of labour and 5 units of protective shell materials. J3 and J4 are their premium models which they purchase the semi-finished jackets from a...

Q:

What does the following notation mean: R 2 . { A 2 } \ times 2 2 8 6 ; R 1 . { A 1 } A 2 is a partial key for the weak entity R 2 and is identified by A 1 All values of R 2 . A 2 must be in the set...

Q:

West Battery Corp. has recently been receiving complaints from retailers that is 9-vot batteries are not lasting es long as other name brands. James West head of the TQM program at West's Austin...

Q:

Activity Directions: Consider a scenario in which several processes compete for access to the same resource (e.g., a file or some memory address). When a process is starved due to resource...

Q:

What is the answer to the question 3) According to the National Highway Traffic Safety Administration, 85% of all U.S. drivers use their seat belts. Assume this percentage represents the true...

Q:

Mr. and Mrs. Worried, long time clients, have come to you for help. Their 13-year-old son has recently been expelled from the public junior high school because of severe behavioral problems,...

Q:

Define the nominal risk-free rate (rRF). What security can be used as an estimate of rRF?

Q:

negotiated a revolving credit agreement with parish bank that can be renewed annually upon bank approval. the amount available under the line of credit is 2 7 . 5 million at the bank's prime rate.

Q:

6. When pure (R)-2-bromobutane is heated with water, two products form as shown in the reaction below. Calculate the e.e. of the product mixture. (5.12) (1 point) 76mmol500mmol+H2

Q:

Economist John Taylor has suggested that the Fed use the following rule for choosing its target for the federal funds interest rate (r): r = 2% + + 12 (y y*) / y* + 12 ( *), where is the average...

Q:

Suppose banks install automatic teller machines on every block and, by making cash readily available, reduce the amount of money people want to hold. a. Assume the Fed does not change the money...

Q:

Consider two policiesa tax cut that will last for only 1 year and a tax cut that is expected to be permanent. Which policy will stimulate greater spending by consumers? Which policy will have the...