USING SQL Using the Henry Books database, for every author listed in the author table, list each book written and sold at Henry Books,  if any. Display the author number as ‘Author Number’, concatenate the author name as first name last name as ‘Author Name’,  and book code as ‘Book Code’.  Order by author number in ascending order.  Be sure all rows are displayed.

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A: Difference between underscore character and % character in SQL:

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A: ANSWER:-

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A: Lets see the solution.

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

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A: Hello student Greetings Hope you are doing great. Thank You!!!

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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.