Join William Lyon for an in-depth discussion in this video Calculations, part of Database Clinic: Neo4J.
- New programmers often make the mistake…of pulling a selection from a database,…then performing calculations in an external language.…Here's an example of this mistake with PHP and MySQL.…Here, we're connecting to a MySQL database in PHP.…MySQL returns a full table…of IDs, first names, and last names.…Then, in PHP, we could go through each row of that data…and calculate some values based on each row,…an average, or perhaps a count of unique entries.…
But in the case MySQL it's much more efficient…to perform that operation inside the database.…Here's an example with MySQL.…All database languages provide…rudimentary data aggregation commands,…such as sum, average, or count.…In this challenge, each instructor is being asked…to forecast the educational demand…for California up to the year 2060.…We will provide them with two data sets.…The California Educational Attainment & Personal Income…will provide education information,…and California Population Projection…by County, Age, Gender and Ethnicity…will provide population forecasts up to 2060.…
- Strengths and weaknesses of Neo4j
- Data modeling
- Creating a database
- Joining data sets
- Modeling data for joining data sets
- Searching a database
- CRUD operations
- Performing calculations
Skill Level Intermediate
1. Neo4j in Five Minutes
A brief overview of Neo4j3m 23s
2. Create a Database
3. Join Two Datasets
4. Search a Database
5. Create, Read, Update, and Delete Operations
6. Averages and Calculations
Next steps1m 44s
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