The power of being able to store large amounts of data in a database is only made useful if that data can be searched. In this video, instructors are challenged to search through a dataset to find specific information.
- Our next challenge involves a needle and a haystack.…Search is arguably the most important…function of any database.…Combing a vast haystack of data for…a specific needle of information…is one of the most common computing tasks.…Google alone processes over…40 thousand searches every second.…That's almost a million searches…since I started talking.…If you're only combing a 30 line spreadsheet,…search can be pretty easy.…
In fact, it might be just as easy…to browse around as it is to use the find dialog.…Unfortunately, many databases are large,…containing terabytes or petabytes of information.…It wouldn't be practical to page through the data…looking for a specific value.…Likewise, searches can be complex.…It's one thing to look for a known number,…but it's more difficult to look for something,…like say the highest salary of dog walkers…in states with rainfall higher than the national average.…
That kind of complex search requires a database…with a sophisticated query language.…Structured query language, or SQL,…
- Strengths and weaknesses of SQLite
- Creating a database
- Joining data sets
- Calculations with SQLite and Python
- Searching a database
- Subqueries and queries in SQLite
- CRUD operations in SQLite with R
Skill Level Intermediate
1. SQLite in Five Minutes
2. Create a Database
3. Join Two Datasets
4. Search a Database
5. Create, Read, Update, and Delete Operations
6. Averages and Calculations
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