The relational schema shown below is part of a hospital database. The primary keys are highlighted in bold. Patient (patientNo, patName, patAddr, DOB) Ward (wardNo, wardName, wardType, noOfBeds) Contains (patientNo, wardNo, admissionDate) Drug (drugNo, drugName, costPerUnit) Prescribed (patientNo, drugNo, unitsPerDay, startDate, finishDate) Formulate the following SQL statements: a) Find the names of all the patients being prescribed ‘Morphine’. b) What is the total cost of Morphine supplied to a patient called ‘John Smith’? c) For each ward that admitted more than 10 patients today, list the ward number, ward type and number of beds in each war

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: Given the default schema of a database: Orders 123 Orderld OrderDate ADC OrderNumber 123 Customerld…

A: A Foreign key is a field in a table that is used to reference the Primary key of another table. It…

Q: rite the SQL statements to create all of the necessary tables to represent the above diagram,…

A: Note: Since you have not provided the database name to write the SQL query so I am using the MYSQL…

Q: Design a database that can satisfy the following requirements: a. For each marina, list the number,…

A: a. To store the data of the marinas, create a table with marina number as primary key and rest of…

Q: Please look at this schema. Please convert this into a relational schema (you can give the answer as…

A: Solution- Data Model Diagram to Relational Database Conversion Rules: 1. Each entity in Data Model…

Q: as a database you need to ensure that each excercise log has a unique ID number, date, excercise…

A: The question has been solved in step2

Q: Choose a database application with which you are familiar. Design  a schema and show a sample…

A: Design a schema and show a sample database for that application, using the notation of Figure 1.…

Q: Which one of the following statement is not true: A complex object is formed by combining other…

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

Q: QUESTION 23 The first readers-writers problem OA) requires that, once a writer is ready, that writer…

A: A database can be defined as it is an organized series of established records, or data, normally…

Q: Seminar eminar ID Integer eminar Date Date Seminar Time Time ocation Seminar Title Address String…

A: As the customer may or may not attend the seminar or several seminars, the seminar and the customer…

Q: Construct appropriate relational schemes for each of the E-R diagrams below.

A: paper(title, author) cite(title) Explanation: The attribute "title" is the primary key for the…

Q: Assume that you are an employee of a consultancy company that specializes in the analysis, design,…

A: Executive summary: This report aims to provide an overview of the fact finding techniques that will…

Q: Primary keys and candidate keys may both be assigned to the same attribute.

A: In relational databases, keys are attributes or combinations of features that can be used to…

Q: The database stores information about houses, each with a house ID, address, and zip code. 2. The…

A: Given: 1. The database stores information about houses, each with a house ID, address, and zip code.…

Q: Problem 82 Write a query to display the lowest book cost in the system (Figure P7.82).

A: Aggregate Functions: SQL has some built-in functions and they are called as aggregate functions.…

Q: The following four tables form part of a library database: • Book (isbn, title, author, genre,…

A: A library database is a structured collection of information designed to manage and organize…

Q: Task 4: As a part of marketing strategy, the Marketing team continuously conducting an advertising…

A: Actually, database is a used to stores the data.

Q: Task 1:Create a database Entity and Relationship Diagram (ERD) for the following application…

A: The objective of the question is to create an Entity Relationship Diagram (ERD) for a mobile…

Q: CUSTOMER Ữ CustomerID FirstName LastName Phone EmailAddress INVOICE InvoiceNumber Customer D Dateln…

A: Schema Structure- --------------Customer---------------- CustomerID (Primary Key)- FisrtName-…

SQL

SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.  

Queries

A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.