﻿ SQL: Neither New York residents nor with a grade above 100

# SQL Exercise: Neither New York residents nor with a grade above 100

## SQL Boolean Operator Statement: Exercise-5 with Solution.

From the following table, write a SQL query to identify customers who do not belong to the city of 'New York' or have a grade value that exceeds 100. Return customer_id, cust_name, city, grade, and salesman_id.

Sample table: customer

``` customer_id |   cust_name    |    city    | grade | salesman_id
-------------+----------------+------------+-------+-------------
3002 | Nick Rimando   | New York   |   100 |        5001
3007 | Brad Davis     | New York   |   200 |        5001
3005 | Graham Zusi    | California |   200 |        5002
3008 | Julian Green   | London     |   300 |        5002
3004 | Fabian Johnson | Paris      |   300 |        5006
3009 | Geoff Cameron  | Berlin     |   100 |        5003
3003 | Jozy Altidor   | Moscow     |   200 |        5007
3001 | Brad Guzan     | London     |       |        5005
```

Sample Solution :

``````-- This query selects all columns from the 'customer' table.
SELECT *
-- Specifies the table from which to retrieve the data (in this case, 'customer').
FROM customer
-- Filters the rows to only include those where neither the 'city' column has the value 'New York'
-- nor the 'grade' column has a value greater than 100.
WHERE NOT (city = 'New York' OR grade > 100);
``````

Output of the Query:

```customer_id	cust_name	city	grade	salesman_id
3009		Geoff Cameron	Berlin	100	5003
```

Code Explanation:

The said SQL query that is selecting all columns (*) from the 'customer' table where NOT (the value of the "city" column is 'New York' OR the value of the "grade" column is greater than 100).
In this query, all rows from the "customer" table that do not match either of these conditions will be returned. It will return all the rows where city is not 'New York' and also the rows where the grade is less than or equal to 100.

Relational Algebra Expression:

Relational Algebra Tree:

Explanation :

Visual presentation:

## Query Visualization:

Duration:

Rows:

Cost:

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