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LENGUAJES PARA LA DEFINICIÓN Y MANIPULACIÓN DE DATOS EN SISTEMAS DE BASE…

- - - - Modificar ALTER
        Eliminar DROP / TRUNCATE
      - Crear
        
        Tipo
        
        Unique, not null, primary key
        
        Constraint, foreign key, references
        
        On update/delete: cascade, set null, default
  - - - Distinct, all
        
        Into
        
        From
        
        Where: like, !=, <, AND, +
        
        Group by - Having
        
        Order by (asc/desc)
        
        Op: count(col), sum, min, max, avg
- - - - Conceptual
      - Lógico
      - Físico
  - - - Algebraicos
        (procedimentales)
      - Declarativos
        (no procedimentales)