Question

Write the statement to delete the β€œ1234” key and the value β€œ450.67” from the payroll database opened in Question 12. 

   Write the statement to delete the β€œ1234” key and the value β€œ450.67” from the payroll database opened in Question 12.
CGI/Perl (Web Warrior Series)
CGI/Perl (Web Warrior Series)
Diane Zak 1st Edition
Chapter 9, Problem 15 ↓

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In this case, the key is "1234" and the value is "450.67".  Show more…

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Write the statement to delete the β€œ1234” key and the value β€œ450.67” from the payroll database opened in Question 12.
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Key Concepts

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Key-Value Database
A key-value database is a type of non-relational database that stores data as a collection of key/value pairs. Each key acts as a unique identifier and is associated with a distinct value, allowing for efficient and fast retrieval of data by directly referencing the key, rather than performing complex queries as in relational databases.
Deletion Operation
The deletion operation in a database involves removing specific data entries, such as key-value pairs, from the database. This operation is an essential part of managing data integrity, as it ensures outdated or incorrect data is effectively removed from the storage system.
CRUD Operations
CRUD stands for Create, Read, Update, and Delete, which are the four fundamental operations in database management. The Delete operation, in this context, specifically refers to the process of removing data from a database, thereby maintaining the accuracy and current state of the information stored.
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The following table called "Players" contains four records of data. Write a SQL statement that deletes the record of the player with ID=4.
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