- Structured Query Language, or SQL (pronounced see-quel), is the language used for querying and manipulating data, and defining structures in databases.
- Data definition language (DDL), data manipulation language (DML), and data control language (DCL)
- Queries, clauses, predicates, expressions, statements, and white space.
- To avoid redundant data, optimize database performance, and ensure data integrity.
- First normal form, second normal form, and third normal form.
- Ensuring consistency and accuracy of data.
- Entity, referential, and domain integrity.
- The top four are Oracle, MySQL, SQL Server, and PostgreSQL.
- It's available for free, it offers a lot of functionality for system and database administrators, it's easy to use and implement, and it's fast and stable.
- Licensing is expensive, and it may require significant database administrator resources after...
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