Which of the following queries returns the book SHORTEST POEMS in the results? S
ID: 3756435 • Letter: W
Question
Which of the following queries returns the book SHORTEST POEMS in the results?
SELECT title, retail
FROM books
WHERE title LIKE 'S_O_T%';
SELECT title, retail
FROM books
WHERE title LIKE 'S_ P_';
SELECT title, retail
FROM books
WHERE title = 'S_O_T%';
SELECT title, retail
FROM books
WHERE title = 'S% P%';
a.SELECT title, retail
FROM books
WHERE title LIKE 'S_O_T%';
b.SELECT title, retail
FROM books
WHERE title LIKE 'S_ P_';
c.SELECT title, retail
FROM books
WHERE title = 'S_O_T%';
d.SELECT title, retail
FROM books
WHERE title = 'S% P%';
Explanation / Answer
The above question uses the concept of SQL Language. These all are the code snippets from SQL Language and are used for querying the data from SQL database. Queries refer to the request of data from some database.
Since we need output as the 'SHORTEST POEMS', let us look at each and every option one by one.
From our observation. First two lines are common in each option, therefore, the difference comes in the third option and we will be looking at that to choose the correct answer.
SELECT command is used to return zero or more rows from database tables. The From command is used as a source of tables and recordsets and return rowsets, tables etc.
Option 1- where clause is always used to filter the data based on the clause. Therefore in this option title is used with LIKE clause which is used for pattern matching. Therefore any record which has the data in the form of S_O_T% which means starting with S, third letter O, and 5th letter T and percent is used for all the further characters. Since our result is SHORT POEMS and this condition satisfies this, therefore we will get SHORT POEMS as the result.
Option 2:- Using the same above logic our data will be returned which is starting with S, third letter P and should be 4 character word since percentage sign is not there. Since this contradicts our result this option is rejected.
Option 3:- In this option = clause is used. This clause checks whether the exact data is present or not i.e it compares the record. Since in this option title = 'S_O_T%' that means the title should be same as S_O_T% but our title is SHORT POEMS. Therefore this option is also rejected.
Option 4:-Using the same above logic this option is also rejected since the title is compared with 'S% P%'.Our title is not equal to this value and therefore this option is also rejected.
So the corect answer is option A. Please upvote. It takes a lot of effort to write this answer
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