Explains how to transform returned data, or generate completely new columns in the result set, using built-in SQL functions
- [Instructor] SQL provides lots of functions…to help you manipulate your data as you retrieve it.…They're a bit like formulae in Microsoft Excel.…Which functions you use depends which data type…the field is that you want to run the function on.…Some functions will only work on text fields,…and others will only work on numeric or date fields.…Some of them are a bit more flexible,…one of those is length.…Length counts the numbers of characters…in a string, or indeed a number.…So here's a query with a string function in it.…
SELECT first_name which is a field,…and then length of first_name.…Most SQL functions take the same form.…The function name followed by parentheses…and then the field name inside.…Now note that if you're using Microsoft Excel,…it's len instead of length.…So when we run this query, we see…that PENELOPE has 8 characters, NICK has 4, and ED has 2.…Using this function has created us a whole new column.…
The first column here is a field name…and the second column is a column that processes information…
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
- Mark as unwatched
- Mark all as unwatched
Are you sure you want to mark all the videos in this course as unwatched?
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
1:30Press on any video thumbnail to jump immediately to the timecode shown.