- NULL (use by IS NULL or IS NOT NULL)
- LIKE operators( % or _ )(not case sensitive)
-Relational Operators(< > <= >= ) - BETWEEN AND keyword
- ORDER BY ( ASC OR DESC
-Aggregate Functions(COUNT, AVG,SUM,MAX, MIN )
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Relational Databases in SQL
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-One to One relationships
-One to Many relationships
-Many to Many relationships
- ER Diagram (Crow's foot notation)
-KEYS ( PRIMARY KEY AND FOREIGN KEY)
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