Glossary · Phase 7 · Software engineering
SQL
The language almost every database understands, for storing, finding, combining and summarizing data in tables.
Try it now
SQL runs in this order, not the order you write it, which explains many confusing errors.
Learn it properly
Databases and SQL · Store, query and join data with the language every database speaks. About 40 minutes.
Other terms from the same lesson
- database transaction: A group of database changes that all happen together or not at all.
- foreign key: A column holding another table's primary key, which links the two rows, like an order's customer_id.
- primary key: A column that uniquely identifies each row of a table, such as an id.
- SQL injection: An attack where text pasted into a database query changes the query itself. Placeholders prevent it.
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