me Data type Constraint AuthorID Integer, auto-increment Primary key Name Up to 40 characters Gender Either ‘male’ or ‘female’ Email Up to 20 characters Book Field name Data type Constraint BookID Integer, auto-increment Primary key Title Up to 50 characters Price Double
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.
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Author
|
Field name |
Data type |
Constraint |
|
AuthorID |
Integer, auto-increment |
Primary key |
|
Name |
Up to 40 characters |
|
|
Gender |
Either ‘male’ or ‘female’ |
|
|
|
Up to 20 characters |
|
Book
|
Field name |
Data type |
Constraint |
|
BookID |
Integer, auto-increment |
Primary key |
|
Title |
Up to 50 characters |
|
|
Price |
Double |
|
Publish
|
Field name |
Data type |
Constraint |
|
PubID |
Integer, auto-increment |
Primary key |
|
AuthorID |
Integer, auto-increment |
Foreign key |
|
BookID |
Integer, auto-increment |
Foreign key |
|
PubDate |
DATE |
|
Insert 2 records in the table Author, 2 records in the table Book and insert their corresponding records in the table Publish
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