SQL Exercise: Number of orders booked for each day
SQL Formatting Output: Exercise-2 with Solution
From the following table, write a SQL query to find the number of orders booked for each day. Return the result in a format like "For 2001-10-10 there are 15 orders".
Sample table: orders
SELECT ' For',ord_date,',there are', COUNT (ord_no),'orders.' FROM orders GROUP BY ord_date;
Output of the Query:
?column? ord_date ?column? count ?column? For 2012-04-25 ,there are 1 orders. For 2012-06-27 ,there are 1 orders. For 2012-07-27 ,there are 1 orders. For 2012-08-17 ,there are 2 orders. For 2012-09-10 ,there are 3 orders. For 2012-10-05 ,there are 2 orders. For 2012-10-10 ,there are 2 orders.
The query in SQL retrieves data from the 'orders' table and returns the information: The string "For", the column ord_date, the string ",there are", the count of the column ord_no, calculated using the COUNT function and grouped by ord_date, and the string "orders."
In the end, the final result that displays the message "For (order_date), there are (count of order_no) orders." for each unique order_date value.
Relational Algebra Expression:
Relational Algebra Tree:
Visual presentation :
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Previous SQL Exercise: Salesmen commission with the percent sign (%).
Next SQL Exercise: Display orders after sorting orders by order number.
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