Sorry I don't understand your question
Answer:
<h1> tag is the correct answer to the given question .
Explanation:
The heading tag is used in the HTML for giving the heading in the webpage there are 6 heading tag is used in the HTML which are used in the different different purpose .
- The <h1> tag is used for the Largest size heading in the main heading of the webpage whereas the <h6> is used for least size heading in the web page.
Following are the example of <h1> tag
<html>
<head> </head>
<body>
<h1 align="center"> Brainly </h1>
<h6> subject </h6>
</body>
</html>
Output:
Following are the attachment of output.
Answer:
By definition a foreign key of table A is a primary key of another table B, thereby establishing a link between them.
To provide referential integrity you can use these referential actions:
- <u>Cascade:</u> If rows in table B are deleted, the matching foreign key columns in table A are deleted.
- <u>Set Null:</u> If rows in table B are deleted, the matching foreign key columns in table A are set to null.
- <u>Set Default:</u> If rows in table B are deleted, the matching foreign key columns in table A are set with the default value of the column.
- <u>Restrict:</u> A value in table B cannot be deleted or updated while as it is referred to by a foreign key in table A.