OPTIMIZACIÓN DE CONSUSLTAS DE BASE DE DATOS.

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SISTEMA PRESUPUESTAL EN COLOMBIA

por Bety Ramirez

¿que es un plan tecnologico?

por Katerine Guerrero

Independencia de Mexico

por Axel Torres

Administración Empresarial. Licenciatura en Administración de Empresas a distancia

por marianela di marco

ALUMNA: ROBLES GARCIA EVELYN GUADALUPE. MATERIA: BASE DE DATOS DISTRIBUIDAS. GRUPO: 5751

OPTIMIZACIÓN DE CONSUSLTAS DE BASE DE DATOS.

To name your story, you have to think about the overall message and what you want your audience to understand from the story. Also, make it relevant and easy to remember.

Optimización de las subconsultas anidadas.

Esta consulta no resulta muy eficiente ya que se evalúa por separado

para cada tupla de la consulta del nivel externo.

Esta técnica para evaluar una consulta con una subconsulta se denomina evaluación correlacionada.

la cláusula where, en SQL son tratadas como funciones que toman parámetros y devuelven uno

Varios o ningún conjunto de valores, los parámetros son las variables de la consulta

del nivel externo que se usan en la subconsulta anidada.

Optimización Heúristica.

Realizar las operaciones de selección tan pronto como sea posible.

Suele ayudar a reducir el costo.

Optimización Local de Consultas

The ending of a story is essential. We all know that if the ending is weak, what happened before loses its importance. So make it unpredictable, but fair. A resolved ending answers all the questions and ties up any loose threads from the plot.

La optimización local utiliza los algoritmos de sistemas centralizados.

Optimizar las consultas distribuidas.

Cada subconsulta que se ejecuta en un nodo, llamada consulta local

This is the closure section of the story.
See examples of possible outcomes below:

• all problems have been solved
• it's clear how each one of your characters ends up
• your main character is transformed by the challenge

es optimizada usando el esquema local del nodo

Try answering these questions to come up with a closure:
- Have all the problems been solved?
- Is there a clear picture of what happens with each character in the story?
- Has the challenge transformed your main character?
- How do the characters feel in the end?

El trabajo de la última capa se efectúa en todos

This is the moment when the main character surpasses the last obstacle and finally faces their greatest challenge.
The climax usually follows one of these patterns:

• realization
• resolution
• choice

Type in your answer.

los nodos con fragmentos involucrados en la consulta

Optimización Global de Consultas

The middle of the story is where you add layers of complications that will lead to the end. Reveal more about the character's journey. Did their personality go through changes? How did they overcome the challenges? And as you build up the story’s central conflict, make it more personal to that character. Also, from the middle act, you have to lead into the final act.

Es una consulta algebraica optimizada con operación de comunicación incluida sobre los fragmentos

La optimización de consultas es el ordenamiento de juntas

algunas permutaciones de juntas dentro de la consulta

pueden conducir a un mejoramiento de varios órdenes de magnitud

Se consideran las características de los fragmentos, tales como, sus cordialidades

La estrategia de ejecución para una consulta distribuida

puede ser descrita con los operadores del álgebra relacional y con primitivas

de comunicación para transferir datos entre nodos

Dada una consulta algebraica sobre fragmentos

There wouldn't be any tension and excitement in your story if there weren't any obstacles in your character's way.

el objetivo de esta capa es hallar una estrategia de ejecución

A story is nothing more than a character overcoming a series of difficulties to reach the desired goal. Obstacles usually create suspense and conflict. In overcoming obstacles, there is growth: weak becomes strong; hatred turns into love; sadness into happiness; wrong into right; lies into truth; or evil becomes good.

See a few examples below:

• stopping a meteor
• finding a killer
• finding love

para la consulta cercana a la óptima.

Es el proceso de selección

In the beginning of the story (or the exposition), you will need to introduce the setting and characters. You might also want to introduce the main conflict. This part of the story is important because it gives the reader necessary background information and maybe even a first insight into a character’s personality.

del plan de evaluación de las consultas

Characters are essential to a good story. Usually, the protagonist(s) is/are the most affected by the plot. Introduce a character by focusing on their actions, interests, and occupation, as the physical appearance doesn't make a difference in most cases.

más eficiente entre las estrategias disponibles

Type in the name of your character.

para el procesamiento de una consulta dada

Add other qualities/attributes of the character.