SQL Exercise: Display customer name, city, grade
SQL Formatting Output: Exercise-6 with Solution
From the following table, write a SQL query to find all the customers. Sort the result-set by customer_id. Return cust_name, city, grade.
Sample table: customer
Sample Solution:
SELECT cust_name,city,grade
FROM customer
ORDER BY customer_id;
Output of the Query:
cust_name city grade Brad Guzan London Nick Rimando New York 100 Jozy Altidor Moscow 200 Fabian Johnson Paris 300 Graham Zusi California 200 Brad Davis New York 200 Julian Green London 300 Geoff Cameron Berlin 100
Code Explanation:
The said query in SQL retrieves data from the 'customer' table and returns the columns cust_name, city, and grade.
The "ORDER BY customer_id" clause sorts the rows in the result set based on the values in the customer_id column.
Relational Algebra Expression:

Relational Algebra Tree:

Explanation :

Visual presentation :

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Previous SQL Exercise: Oldest orders first on the highest purchase amount.
Next SQL Exercise: Salesman details by smallest ID along with order date.
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SQL: Tips of the Day
A table name as a variable -
For static queries, like the one in your question, table names and column names need to be static.
For dynamic queries, you should generate the full SQL dynamically, and use sp_executesql to execute it.
Static query:
SELECT * FROM [DB_ONE].[dbo].[ACTY] EXCEPT SELECT * FROM [DB_TWO].[dbo].[ACTY]
Ref: https://bit.ly/3sFxxnk
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