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explain_tablespaces_index_XML.sql
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-----------------------------------------------------------------------------------------------------
--Apartado A ----------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------
EXPLAIN SELECT p.project_name, p.start_date, t.task_name
FROM erp.tb_task_project AS tp,
erp.tb_tasks AS t,
erp.tb_projects AS p
WHERE tp.task_id = t.task_id AND
tp.project_id = p.project_id AND
t.task_id IN ('IE', 'SP', 'AS') AND
(p.budget_behaviour LIKE '%closed%' OR p.budget_behaviour LIKE '%margin%')
ORDER BY p.start_date DESC;
-----------------------------------------------------------------------------------------------------
--Apartado B ----------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------
CREATE TABLESPACE tb_index_budgetbehaviour
LOCATION 'C:/Users/maite/Desktop/DATASCIENCE_1/Bases de datos';
ALTER TABLE erp.tb_projects SET TABLESPACE tb_index_budgetbehaviour;
CREATE INDEX indexOnBudgetBehaviour
ON erp.tb_projects USING btree (budget_behaviour)
TABLESPACE tb_index_budgetbehaviour;
ANALYZE erp.tb_projects;
EXPLAIN SELECT p.project_name, p.start_date, t.task_name
FROM erp.tb_task_project AS tp,
erp.tb_tasks AS t,
erp.tb_projects AS p
WHERE tp.task_id = t.task_id AND
tp.project_id = p.project_id AND
t.task_id IN ('IE', 'SP', 'AS') AND
(p.budget_behaviour LIKE '%closed%' OR p.budget_behaviour LIKE '%margin%')
ORDER BY p.start_date DESC;
-----------------------------------------------------------------------------------------------------
--Apartado C ----------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------
SELECT p.start_date, p.project_name, t.task_name
FROM erp.tb_task_project AS tp
JOIN erp.tb_tasks t USING (task_id)
JOIN erp.tb_projects p USING (project_id)
WHERE t.task_id IN ('IE', 'SP', 'AS') AND
(p.budget_behaviour LIKE '%closed%' OR p.budget_behaviour LIKE '%margin%');
-----------------------------------------------------------------------------------------------------
--Apartado D ----------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------
-- Consulta de SQL normal de lo que se busca:
SELECT p.description, p.project_name, e.phone, tp.task_id, tp.start_date, p.budget
FROM erp.tb_projects p
JOIN erp.tb_employees e ON p.sales_manager = e.employees_id
JOIN erp.tb_task_project tp USING (project_id);
-- Consulta SQL que permite crear la estructura XML siguiente:
SELECT xmlelement(name "project", xmlattributes(p.description AS "description"),
xmlelement(name "name", p.project_name),
xmlelement(name "phone_contact", e.phone),
xmlelement(name "active_task", tp.task_id),
xmlelement(name "date_task", tp.start_date),
xmlelement(name "cost_project", p.budget)) AS project_xml
FROM erp.tb_projects p
JOIN erp.tb_employees e ON p.sales_manager = e.employees_id
JOIN erp.tb_task_project tp USING (project_id);