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28mEste documento muestra dos formas de unir tablas en una base de datos para seleccionar datos de columnas específicas. La primera forma utiliza una consulta SELECT con dos tablas separadas y una condición WHERE, mientras que la segunda forma utiliza un JOIN INNER para unir las tablas y seleccionar los datos.
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Joins
- 1. --1ra forma USE ferreteria SELECT nombper,nombprod FROM Personal ,Producto WHERE idpersonal = idproducto --2da forma USE ferreteria SELECT nombper,nombprod FROM Personal INNERJOIN Producto ON Personal.idpersonal = Producto .idproducto