Join William Lyon for an in-depth discussion in this video Join datasets, part of Database Clinic: Neo4J.
- Data is inherently messy.…And in this next challenge,…our instructor has to clean it up.…Datasets are stored in different formats.…Sometimes as flat files with simple rows…and column relationships.…Sometimes as key value pairs…as found in JSON or XML files.…Sometimes data is stored and distributed…with built-in relationships.…These are often found in SQL files.…To make things more complex,…data is also stored in various formats.…
For example, sometimes dates are stored as strings,…other times as the number of seconds…since January 1st, 1970…also known as the Epoch.…Numbers can be stored as strings, integers, or floats.…Locations can be represented as longitude and latitude…or it can defined as zip code, county,…or a magnitude of other formats.…Because of this, datasets often need to be reformatted.…Data scientists refer to this…as the Extract, Transform, and Load process or ETL.…
Extraction is the simple operation of opening a data file.…The instructor did this in the previous chapter.…Transform is the process of converting data…
Author
William Lyon
Released
9/19/2017- 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
Duration
Views
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Introduction
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Welcome1m 17s
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The Database Clinic series1m 22s
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1. Neo4j in Five Minutes
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A brief overview of Neo4j3m 23s
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2. Create a Database
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Data modeling3m 52s
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Creating a database3m 56s
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Import data10m 27s
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Query data3m 12s
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3. Join Two Datasets
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Join datasets2m 50s
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Import data6m 26s
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4. Search a Database
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Database search1m 51s
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Query the database5m 22s
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Finalize the database query3m 34s
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5. Create, Read, Update, and Delete Operations
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CRUD operations2m 31s
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Create operations in Neo4j8m 36s
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Update operations in Neo4j8m 11s
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Delete operations in Neo4j3m 44s
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Read operations in Neo4j3m 43s
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6. Averages and Calculations
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Calculations1m 59s
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Update the data model3m 36s
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Refactor the data model10m 22s
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Import data for calculations5m 52s
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Perform calculations7m 55s
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Conclusion
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Next steps1m 44s
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Video: Join datasets