Note: PL/SQL can be executed in SQL*Plus or SQL Developer or Oracle Live SQL. 1. Write an anonymous block to retrieve the doctor’s ID and name which in charge of certain patient. Allow the user to enter the patient’s ID. 2. Write an anonymous PL/SQL block that will insert a new doctor into the DOCTOR table. Verify that insert has been done successfully by issuing a select * from doctor. 3. Write an anonymous PL/SQL block that will update the salary of all doctors in the Pediatrics area by 1000 (Note: Current salary + 1000). Verify that the salary has been updated by issuing a select * from doctor where area = ‘Pediatrics’. You may have to run the select statement twice to check the data before and after the update. 4. Write an anonymous PL/SQL block that will delete all patients for doctors that works in the Family Practice area. Verify that patients have been deleted accordingly. Then do a select * from patients where doc_id = (select doc_id from doctor where area = ‘Family Practice’. You should get no rows.
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.
Note: PL/SQL can be executed in SQL*Plus or SQL Developer or Oracle Live SQL.
1. Write an anonymous block to retrieve the doctor’s ID and name which in charge of certain patient. Allow the user to enter the patient’s ID.
2. Write an anonymous PL/SQL block that will insert a new doctor into the DOCTOR table. Verify that insert has been done successfully by issuing a select * from doctor.
3. Write an anonymous PL/SQL block that will update the salary of all doctors in the Pediatrics area by 1000 (Note: Current salary + 1000). Verify that the salary has been updated by issuing a select * from doctor where area = ‘Pediatrics’. You may have to run the select statement twice to check the data before and after the update.
4. Write an anonymous PL/SQL block that will delete all patients for doctors that works in the Family Practice area. Verify that patients have been deleted accordingly. Then do a select * from patients where doc_id = (select doc_id from doctor where area = ‘Family Practice’. You should get no rows.
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