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SQL Exercises: Find the customers along with the salespersons who work for them

SQL Query on Multiple Tables: Exercise-2 with Solution

From the following tables, write a SQL query to locate all the customers and the salesperson who works for them. Return customer name, and salesperson name.

Sample table: customer


Sample table: salesman


Sample Solution:

SELECT customer.cust_name, salesman.name
FROM customer,salesman
WHERE salesman.salesman_id = customer.salesman_id;

Output of the query:

cust_name	name
Nick Rimando	James Hoog
Brad Davis	James Hoog
Graham Zusi	Nail Knite
Julian Green	Nail Knite
Fabian Johnson	Mc Lyon
Geoff Cameron	Lauson Hen
Jozy Altidor	Paul Adam
Brad Guzan	Pit Alex

Relational Algebra Expression:

Relational Algebra Expression: Find the customers along with the salesmen who works for them.

Relational Algebra Tree:

Relational Algebra Tree: Find the customers along with the salesmen who works for them.

Explanation:

Syntax to find the names of all customers along with the salesmen who works for them

Pictorial presentation:

Result of the names of all customers along with the salesmen who works for them

Practice Online


Query Visualization:

Duration:

Query visualization of Find the customers along with the salesmen who works for them - Duration

Rows:

Query visualization of Find the customers along with the salesmen who works for them - Rows

Cost:

Query visualization of Find the customers along with the salesmen who works for them - Cost

 

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Previous: From the following tables, write a SQL query to find the salespersons and customers who live in same city. Return customer name, salesperson name and salesperson city.
Next: From the following tables, write a SQL query to find those sales people who generated orders for their customers but not located in the same city. Return ord_no, cust_name, customer_id (orders table), salesman_id (orders table).

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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