SQL subqueries on employee Database: List those managers who are getting salary to less than the salary of his employees
SQL subqueries on employee Database: Exercise-46 with Solution
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46. 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.
Sample table: employees
Sample Solution:
SELECT *
FROM employees w
WHERE salary < ANY
(SELECT salary
FROM employees
WHERE w.emp_id=manager_id);
OR
SELECT DISTINCT m.emp_name,
m.salary
FROM employees w,
employees m
WHERE w.manager_id = m.emp_id
AND w.salary>m.salary;
OR
SELECT *
FROM employees w
WHERE emp_id IN
(SELECT manager_id
FROM employees
WHERE w.salary<salary);
Sample Output:
emp_id | emp_name | job_name | manager_id | hire_date | salary | commission | dep_id --------+----------+----------+------------+------------+---------+------------+-------- 65646 | JONAS | MANAGER | 68319 | 1991-04-02 | 2957.00 | | 2001 (1 row)
Relational Algebra Expression:
Relational Algebra Tree:
Practice Online
Structure of employee Database:
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Previous: From the following table, write a SQL query to find those managers who handle maximum number of employees. Return managers name, number of employees.
Next: From the following table, write a SQL query to find those employees who are sub-ordinates of BLAZE. 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
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