key of Film and there is a referential integri . directorNum and Film, directorNum. Discuss all the integrity constraints that are violated in the relations below. Director directorNum directorbi 100
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.
![relations Director and Film, where directorNum is the primary key of
Director, filmNum is the primary key of Film and there is a referential integrity between
Director. directorNum and Film. directorNum.
Discuss all the integrity constraints that are violated in the relations below.
Director
directorNum
Film
directorName
100
Age
filmNum filmName
directorNum
Marielle Heller
55
1001
A Beautiful Mind
100
101
Ron Howard
46
1002
About Time
102
102
Richard Curtis
50
1003
Adrift
101
101
Stanley Kubrick
35
1004
Allied
103](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F318d98cd-baaf-409e-9667-907beadcec26%2Ff51a374c-8234-4bfd-a29e-6a8b28c2c3df%2Fgkl56u_processed.jpeg&w=3840&q=75)
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