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Write a query to display all the contact number of the building_type named 'Police Station'. Display the records in ascending order based on the contact number.Note:1. Display only the contact_number column present in the building table where building_type name is ‘Police Station’. Use subqueries to achieve this.2. Tables involved are building_type and building.3. Order by is mandatory.4. Compare your executed result with the sample output given below.

Question

Write a query to display all the contact number of the building_type named 'Police Station'. Display the records in ascending order based on the contact number.Note:1. Display only the contact_number column present in the building table where building_type name is ‘Police Station’. Use subqueries to achieve this.2. Tables involved are building_type and building.3. Order by is mandatory.4. Compare your executed result with the sample output given below.

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Solution

Here is the SQL query you need to write to get the desired output:

SELECT contact_number 
FROM building 
WHERE building_type_id IN (
    SELECT id 
    FROM building_type 
    WHERE name = 'Police Station'
) 
ORDER BY contact_number ASC;

Here is the step by step explanation:

  1. SELECT contact_number FROM building: This part of the query selects the contact_number column from the building table.

  2. WHERE building_type_id IN (SELECT id FROM building_type WHERE name = 'Police Station'): This

This problem has been solved

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