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SQL subqueries on employee Database: List the name of the managers who is having maximum number of employees working under him

SQL subqueries on employee Database: Exercise-45 with Solution

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45. From the following table, write a SQL query to find those managers who handle maximum number of employees. Return managers name, number of employees.

Sample table: employees


Sample Solution:

SELECT m.emp_name,
       count(*)
FROM employees w,
     employees m
WHERE w.manager_id = m.emp_id
GROUP BY m.emp_name
HAVING count(*) =
  (SELECT MAX (mycount)
   FROM
     (SELECT COUNT(*) mycount
      FROM employees
      GROUP BY manager_id) a);

Sample Output:

 emp_name | count
----------+-------
 BLAZE    |     5
(1 row)

Practice Online


Structure of employee Database:

employee database structure

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Previous: From the following table, write a SQL query to find those departments where more than average number of employees works. Return department name.
Next: From the following table, write a SQL query to find those managers who receive less salary then the employees work under them. Return complete information about the employees.

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SQL: Tips of the Day

SQL Server SELECT into existing table. 

INSERT INTO dbo.TABLETWO
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

This assumes there's only two columns in dbo.TABLETWO - you need to specify the columns otherwise:

INSERT INTO dbo.TABLETWO
  (col1, col2)
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

Database: SQL Server

Ref: https://bit.ly/3y6tpA3