Author Question: A lack of naming conventions can lead to confusion and make it harder to maintain or modify a ... (Read 78 times)

crobinson2013

  • Hero Member
  • *****
  • Posts: 535
A lack of naming conventions can lead to confusion and make it harder to maintain or modify a database.
 
  Indicate whether the statement is true or false

Question 2

Explain cross joins and how one might result by accident.
 
  What will be an ideal response?



Joy Chen

  • Sr. Member
  • ****
  • Posts: 354
Answer to Question 1

TRUE

Answer to Question 2

In a cross join each record of the first table is matched to every record in the second table. This can happen by accident in a equi join if the developer forgets to include the relationship between the tables in where clause of the join.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

For a complete list of videos, visit our video library