Because of referential integrity, before any row can be entered into the SECTION table, the CourseID to be entered must already exist in the COURSE table. Write an SQL assertion that will enforce this constraint.

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: In SQL:  Explicit Cursors also have Attributes. Name one of the four explicit cursor attributes and…

A: Indeed, Explicit cursors in database systems have attributes that will describe the behavior of the…

Q: Write an SQL statement to list LastName and FirstName of customers who have purchase an item that…

A: we need to write Write an SQL statement to list LastName and FirstName of customers who have…

Q: . Write SQL statements to create a table named STUDENT, with the following columns: StdID:…

A: In this question we have to write SQL QUERY for the given table name STUDENT.Let's query and hope…

Q: Define Trigger and write a PL/SQL code for creating a trigger that can be triggered when the table…

A: We will talk about PL/SQL triggers in this chapter. Triggers are stored programmes that are launched…

Q: A select operation in a relational database decreases the size of a table by removing columns that…

A:

Q: A select operation in a relational database decreases the size of a table by removing columns that…

A: The SELECT operation searches data in a table and retrieves records based on certain criteria.…

Q: Create a stored procedure named prc_new_rental to insert new rows in the RENTAL table. The procedure…

A: A stored procedure called prc_new_rental has been developed in response to the request to help with…

Q: Choosing rows from the table Recall that the WHERE clause in an SQL statement specifies conditions…

A: To modify the select query to filter the result where LastName as Kay in the Employees table using…

Q: Define a view named ItemOrder. It consists of the TaskID, description, price, order number, order…

A: a) Consider the following SQL query to create a view ItemOrder that consists of ItemNum,…

Q: A referential integrity error exists when a foreign key value in one table has matching primary key…

A: About Referential integrity Referential integrity means that the foreign key in any referencing…

Q: Write Create Table SQL statements based on the above ERD. All tables must have primary keys. All…

A: Big Data SQL: Big data SQL or structured query language can be regarded as a base or medium of…

Q: Modify the SQL statement to: Add the State field to the SELECT The State field should appear before…

A: Given SQL: SELECT Count(ParentID) AS NumberParentsFROM Parent;

Q: A select operation in a relational database is used to reduce the size of a table by deleting…

A: Select operation in a relational database is used to reduced the size of the table by deleting…

Q: In SQL, is this a true or false statement: Pseudocolumns contain values present in a table, but not…

A: Pseudo columns: A pseudo-column is like a column for a table but not stored in a table in reality.…

Q: A select operation in a relational database decreases the size of a table by removing columns that…

A: The last few chapters have covered fundamental database query strategies. This chapter focuses on…

Q: Execute a SQL statement to delete the column status from order_db.

A: The DELETE statement in SQL is a powerful tool for putting off data from a database desk. It allows…

Q: A select operation in a relational database decreases the size of a table by removing columns that…

A: Denormalizing a database requires the data to be normalized first.Denormalization is the process of…

Q: Database  Q1: Select the correct SQL statement to provide the user Samer with read only permission…

A: Database:     A database is an organized collection of structured data, generally stored and…

Q: Write Create Table SQL statements based on the above ERD. All tables must have primary keys. All…

A: Given diagram contains entities Book, Allocation and Author. These entities attributes are: Book-…

Q: In a sql database give an example of a search problem that will work with an inner join and will not…

A: Find the answer given as below :

Intermediate SQL Concepts

A query is a request for data or information from one or more database tables. This information could be presented in the form of pictorials, graphs, or complicated findings which helps in easy interpretation. Structured Query Language (SQL) is the most widely used programming language for retrieving and organizing data from relational databases. Collection of tables with rows and columns is referred to as a database. SQL is the language of databases. It makes it easier to extract specific data from databases, which can then be used for analysis.