The answer is Count. Count is an aggregate method in SQL that returns the number of rows for a specified column that have non-null values.
<h3>What is the Meaning of Null?</h3>
When a field in a database has no values at all, this is known as null and indicates that the field’s value is unknown.
A null value for a number field, text field, or space value is different from a zero value. Null indicates that no value has been recorded in a database field.
A value and a null cannot be compared. The Structured Query Language query cannot be written as SELECT * FROM Customer where email Address=null, for instance, if it is intended to obtain all customers without email addresses from a Customer Addresses table.
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Answer:
Manolo: Hello ... Irene, isn't it?
Irene: Yes. I'm Irene, okay?
MAnolo: Alright. I'm Manolo.
Irene: I hope I wasn't late.
Manolo: What time is it?
Irene: 2 pm.
Manolo: You arrived just in time.
Irene: What course do you take?
Manolo: I study history and philosophy and you?
Irene: English literature.
Manolo: Can we start the research?
Irene: Yes, we can. I believe that we can find suitable books in the third hall. Should we go?
Manolo: Sure.
Explanation:
The dialogue was made with basic questions between two people who were meeting and needed to do academic work together. As they were in a library, I believe that the execution of some academic research between the two is the most appropriate subject to establish this dialogue.
Answer:
chronic pain
Explanation:
Chronic pain -
it refers to the type of pain which lasts for at least 12 weeks , is referred to as chronic pain .
The pain can be very sharp as well as dull , and may cause some burning sensation on the specific area .
There is no specific location in the body to get a chronic pain .
<u>The most common type of chronic pain are - </u>
cancer pain , lower back pain , postsurgical pain , headache etc.
The pain can sometimes make the person very stressed and disrupts the sleep cycle of the person .
Hence , from the given information of the question ,
The correct answer is chronic pain .
All weather reports contain information on the same conditions as that is the way weather is predicted. Henceforth, weather predictors will use the same method each time.
This data is called "secondary data".
An example for a usage of a secondary data is when a researcher takes up a data collected by someone else, for exam ple a large survey, and analyses this data to receive new insights from it - this is a fairly common practice. Often for example official government data is used by scientists