SQL Exercises: Calculate the total allotment for all departments

Last update on December 20 2024 11:53:12 (UTC/GMT +8 hours)

From the following table, write a SQL query to compute the sum of the allotment amount of all departments. Return sum of the allotment amount.

Sample table: emp_department

DPT_CODE DPT_NAME        DPT_ALLOTMENT
-------- --------------- -------------
      57 IT                      65000
      63 Finance                 15000
      47 HR                     240000
      27 RD                      55000
      89 QC                      75000

Sample Solution:

-- This query calculates the sum of 'dpt_allotment' from the 'emp_department' table.
SELECT SUM(dpt_allotment)
-- Specifies the table from which to retrieve the data (in this case, 'emp_department').
FROM emp_department;

Output of the Query:

sum
450000

Code Explanation:

The query in SQL retrieves the sum of the values in the "dpt_allotment" column from the 'emp_department' table. The result will be a single value representing the total sum of the "dpt_allotment" column.

Relational Algebra Expression:

Relational Algebra Tree:

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