Some rows of the STUDENT table are shown below: CODE NAME GPA YEAR 291 ALEX 3.1 2 938 MICHELE 2.3 1 931 JHON 3.3 1 182 JOE 3.4 2 190 REY 2.0 2 330 RON 3.9 3 Which best describes the result of the query below? SELECT YEAR, AVG(GPA) FROM STUDENT WHERE GPA > 2.0 GROUP BY YEAR a. The average maximum GPA of all the students in each year. b. The year of the student with the maximum GPA. c. The average GPA of students with a GPA higher than 2.0 each year. d. The average GPA of the students with a GPA higher than 2.0.
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
|
CODE |
NAME |
GPA |
YEAR |
|
291 |
ALEX |
3.1 |
2 |
|
938 |
MICHELE |
2.3 |
1 |
|
931 |
JHON |
3.3 |
1 |
|
182 |
JOE |
3.4 |
2 |
|
190 |
REY |
2.0 |
2 |
|
330 |
RON |
3.9 |
3 |
Which best describes the result of the query below?
SELECT YEAR, AVG(GPA) FROM STUDENT WHERE GPA > 2.0 GROUP BY YEAR
| a. |
The average maximum GPA of all the students in each year. |
|
| b. |
The year of the student with the maximum GPA. |
|
| c. |
The average GPA of students with a GPA higher than 2.0 each year. |
|
| d. |
The average GPA of the students with a GPA higher than 2.0. |
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