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Concept Dump: SQL Database
- SQL Database - “Data storage using columns to define keys and rows which provide values for each column. Microsoft Excel is pretty much one of these.”
- Column - “Defines a type of data and what it represents.”
- Table - “Group of columns.”
- Row - “Data entry that is made up of columns.”
- Primary Key - “Main column that serves as an identifier for a row.”
- Index - “Commonly used column that serves to identify a row quicker than non-indexes.”
- Composite Keys - “Key or index made up of multiple columns.”
- Select - “Reads and returns rows based on matching criteria.”
- Join - “Combines tables based on matching values in rows using columns from each table.”
- Deduplication - “Concept of only writing the same data once and joining tables to infer the same information for different purposes.”
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concept dump