1. CS122B: Projects in Databases and Web Applications Winter 2019
Professor Chen Li
Department of Computer Science
UC Irvine
Notes 05: Pagination, Caching, Sort, Search, Browse

2. Pagination
Show results in different pages

3. SQL Support
SELECT columns
FROM table
LIMIT 20
OFFSET 10

4. Embedding parameters in GET requests
Example:

5. Caching in Tomcat Store the query results as an object
Later requests can be served using the cache without querying the database

6. Caching in Tomcat Pros: Cons: Less traffic on DB Low response time
Memory overhead in web server
Results may be obsolete

7. Searching/Browsing

8. Different queries Browsing: SELECT *
FROM Movies, genres, genres_in_movies
WHERE genres.name = “action”
Searching:
SELECT * FROM Movies
WHERE title LIKE “%term%”;

9. Same page of movie list
Implement a Java Servlet program by taking a SQL query as a parameter
Show the results of the query as a list of movies.

10. Sorting
Frontend GET request includes a sorting parameter such as “DESC” and “ASCE”;
Use “ORDER BY” in SQL to sort the results