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The answer that is a record in a relational database is called; A row
<h3>What is a record in relational database?</h3>
In relational databases, a record is defined as a group of related data held within the same structure. Furthermore, we can say that a record is a grouping of fields within a table that reference one particular object.
Now, in relational database, a row is called a record because each row, contains a unique instance of data or key for the categories defined by the columns.
Read more about Relational Database at; brainly.com/question/13262352
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Answer:
cooling
Explanation:
Air cooling is a process of lowering air temperature by dissipating heat. It provides increased air flow and reduced temperatures with the use of cooling fins, fans or finned coils that move the heat out of a casing such as a computer …
Answer:
Open a document: Ctrl + O.
Create a new document: Ctrl + N.
Save the current document: Ctrl + S.
Open the Save As window: F12.
Close the current document: Ctrl + W.
Split the window: Alt + Ctrl + S.
Copy: Ctrl+C
Paste: Ctrl+V
Cut the current selection: Ctrl + X
Copy the current selection: Ctrl + C
Paste the contents of the clipboard: Ctrl + V
Bold: Ctrl + B
Italics: Ctrl + I
Underline: Ctrl + U
Underline words only: Ctrl + Shift + W
Center: Ctrl + E
Make the font smaller: Ctrl + [
Make the font bigger: Ctrl + ]
Change text to uppercase: Ctrl + Shift + A
Change text to lowercase: Ctrl + Shift K
Insert a page break: Ctrl + Enter
Add a hyperlink: Ctrl + K
Explanation:
Answer:
a) We know that atleast one or more author writes a book.
Symbol to indicate one or more is (B)
So the correct option is B
b) We know that zero to multiple books are written by any author.
Symbol to indicate zero or more is (A)
So the correct option is A
c) The fourth option is correct if we replace by many to many relationship and generate a new entity.
So the relationship betweem author and contract is one to many. So we know that there is atleast one author that represent in symbol d and books has atleast 0 that represent in symbol c.
So Fourth Option is correct d at blue side and c at red side.
d) There are two forirgn keys in table Contract one is from AuthorId and other is ISBN.
So correcct option is C
