Introduces views in MySQL, including how to find the view definition. Uses the definition of a stored view as a sample SQL query to walk through
- [Instructor] In this chapter, we're going to look at…some of the more advanced aspects of SQL:…Functions, Procedures, Variables, and Views.…We're going to start with Views,…and you can see that we have…seven listed here on the left-hand side.…Now a word of caution here.…What follows is specific to MySQL.…All database software should implement…a variation on this theme,…but they can be really quite different,…so this one is specific to MySQL.…Now, the word view has a very specific meaning…in the world of databases.…
A view is a stored query,…so when we click on the view,…we're shown a fairly simple query,…SELECT * FROM 'actor_info',…that looks very much as though…it could be selecting data from a table.…And if we look at the data that's returned,…again, it looks very much like a table.…We have a series of fields, and we have a series of rows,…but in actual fact, this isn't a table,…and the data aren't stored in the view.…The data are stored in fields…that are located in the tables, and all the view stores…is a fairly complex query,…
Join Emma Saunders as she shows you how to design and write simple SQL queries for data reporting and analysis. Review the different types of SQL, and then learn how to filter, group, and sort data, using built-in SQL functions to format or calculate results. Learn a bit about data types and database design. Discover how to perform more complex queries, such as joining data together from different database tables. Last but not least, Emma shows how to save your queries as views, so you can run them again and again.
- Using different versions of SQL
- Retrieving data with SELECT statements
- Filtering and sorting your results
- Transforming results with built-in SQL functions
- Grouping SQL results
- Merging data from multiple tables
- Identifying data types, and how to make sense of your database design
- Saving SQL queries
Skill Level Intermediate
1. Use SQL to Report Data
Data types in SQL databases5m 47s
2. Group your SQL Results
3. Merge Data from Multiple Tables
4. Advanced Features and Taking Your Learning Forwards
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