15. Use a query to compute the total of all purchases, the number of purchases, and the average purchase amount made by each customer. Your output values must match those shown in Figure P7.15. Sort the results by customer code. FIGURE P7.15 AVERAGE PURCHASE AMOUNT BY CUSTOMER CUS CODE CUS BALANCE Total Purchasas Numbar of Purchasas 10011 Average Purchas Amount 6 dd4. 00 153.85 0.00 74.00 10012 345.86 3 51.28 10014 0.00 422.77 70.46 10015 10010 34. 97 70 44 0.00 2 17.48 216.55 70.44

Q: Display the list of students who are involved in the IT club Display the details of all the…

A: First get the studid from Club table and then get those Student details This can be done using inner…

Q: Difference between count (*) and count (col_name). Explain with an example.

A: The above question is solved in step 2 :-

Q: Write a query to list the first name and last name of all authors. Concatenate the first and last…

A: The SQL query is: SELECT CONCAT(CONCAT(firstname,' '),lastname) AS FullName FROM author;…

Q: Use SQL Developer or Oracle Live SQL to write the appropriate SQL commands as follows: A) FUNCTION:…

A: Answer: Oracle: CREATE FUNCTION Return_region_name(region_id IN NUMBER)RETURN NUMBERIS region_name…

Q: Write the T-SQL scripts for the following tasks:   Write a query to select the employees whose…

A: Please refer to the following step for the complete solution of the problem above.

Q: Write SQL statements to list the name of Lee’s subordinate employee.    (Data Update)     Write…

A: Lees Employee ID is 2 So, to get the lees subordinate then we need to search for this employee ID in…

Q: Design a query of Stores with the following: Store Name, Store Size, Sum of order amounts,  Percent…

A: JOIN Based on a common column between two or more tables, a JOIN clause is used to merge rows from…

Q: The following figure is part of a university database. LNAME and FNAME stands for last name and…

A: Project operation (denoted by pi (∏) symbol) is used to select desired columns (or attributes) from…

Q: A)  Write a query which shows the employee IDs that are unique to the employee table. Order the…

A: Solution A) -  In the first part, we need to write a query to employee Ids and the employee should…

Q: The data in this table is as follows: Team Opponent Dragons Carp Bay Stars Marines Ham Fighters…

A: As the query suggested it will select the team from the table score where the corresponding value of…

Q: Write a query to display the current salary for each employee in department 300. Assume that only…

A: In a corporate setting, managing employee information, salary details, and departmental affiliations…

Q: Code three tests: 1) for a student who has courses 2) for student who does not have courses 3) a…

A:

Q: The data in this table is as follows: Team Dragons The latest scores from the Japanese Baseball…

A: The correct answer is given below with explanation

Q: Write a query to display the first name, last name, and email address of employees hired from…

A: In this question we have to write a query to display the first name, last name, and email address of…

Q: Write SQL queries for the following database: id Customers name email Categories id name id…

A: Since there are multiple parts to a single question, the first three subparts are answered for you.…

Q: Write PL/SQL or T-SQL procedures to accomplish the following tasks: A: obtain the name and credit…

A: Actually, SQL stands for Structured Query Language.

Q: Use SQL Developer or Oracle Live SQL to write the appropriate SQL commands as follows: A) FUNCTION:…

A: A) : create function Return_region_name { @region_id num, } returns varchar as begin  (select name…

Q: Write a query to display the author last name, first name, book title, and replacement cost for each…

A: To display the author_last_name,first_name ,book_title and replacement cost and sort the result by…

Q: Develop a query to provide details about customer sales at the end of 2014. You want the output to…

A: SELECT Sale.ShipToCity, Customer.LastName, Sale.ShipDateFROM Sale JOIN Customer on  Sale.CustID…

Q: Write a query to display the checkout number, book number, patron ID, checkout date, and due date…

A: The query follows the syntax given below. SELECT column1, column2 FROM table1 WHERE condition ORDER…

Q: This is the problem: (from Database Systems Book, 13th ed) Write a query to display the author last…

A: Create table AUTHORS_OF_BOOKS using the below query: SQL QUERY: /* Create a table called NAMES…

Q: Write and execute a SQL query to list all patient numbers and encounter ids which do not have any…

A: Actually, SQL stands for Structured Query Language.

Q: SQL SUM Problem    -SELECT * FROM [Sale Order] INNER JOIN Product ON [Sale Order] productID =…

A: Structured Query Language (SQL) is a programming language used to create, manipulate and query data…

SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.