que hace not null en sql ejemplos reales
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YouTubeSql Ninja Pro by Anais Silva
que hace not null en sql ejemplos reales
La restricción NOT NULL en SQL evita que un campo quede vacío. Si intentas insertar un valor nulo en una columna con NOT NULL, MySQL te mostrará un error. Es una forma de mantener la integridad de tus datos y garantizar que la información importante siempre esté completa. Descubre cómo funciona y cuándo usarla correctamente. 📘 Aprende ...
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