oka

Author: walter2016

parcial2.sql

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+--Bloque anonimo
+
+DECLARE 
+	v_store_name stores.store_name%TYPE:='London';
+	n_year int:=2018;
+	n_order_count int;
+BEGIN
+	select count(*)
+	into n_order_count
+	from orders o 
+	inner join stores s 
+		on o.store_id = s.store_id
+	where extract(year from o.order_datetime)=n_year
+	and s.tore_name=v_store_name
+	group by s.store_name, extract(year from o.order_datetime);
+	dbms_output.put_line('Total de ordenes para '|| v_store_name||' en' ||n_year||':'||n_order_count);
+	
+END;
+
+--Funciones
+--IN se comporta como constante
+--OUT parametros que no proveen valor pero son asignados y retornados
+--IN OUT proveen valor y son asignados y retornados io
+CREATE OR REPLACE FUNCTION obtener_conteo_ordenes_por_tienda_y_anio(
+i_store_name IN stores.store_name%TYPE,
+i_year IN INT
+)
+RETURN int IS
+n_order_count int;
+BEGIN
+	select count(*)
+	into n_order_count
+	from orders o 
+	inner join stores s 
+		on o.store_id = s.store_id
+	where extract(year from o.order_datetime)=i_year
+	and s.tore_name=i_store_name
+	group by s.store_name, extract(year from o.order_datetime);
+	RETURN(n_order_count);
+end;
+
+select obtener_conteo_ordenes_por_tienda_y_anio('Berlin',2018) from dual;
+DROP FUNCTION obtener_conteo_ordenes_por_tienda_y_anio;
+
+--Procedimientos (son bloques anonimos almacenados), ejecutan acciones no retornan nada
+--Ejemplo 1:
+CREATE OR REPLACE PROCEDURE insertar_tienda(
+i_nombre IN stores.store_name%TYPE DEFAULT' Desconocido',
+i_loc IN stores.physical_address%TYPE DEFAULT 'Desconocido'
+)
+IS
+BEGIN
+	INSERT INTO STORES(STORE_NAME,PHYSICAL_ADDRESS)
+	VALUES(i_nombre,i_loc);
+end insertar_tienda;
+
+BEGIN
+	insertar_tienda();
+	insertar_tienda('Training','New york');
+	insertar_tienda(i_loc => 'BOSTON');
+END;
+DROP PROCEDURE insertar_tienda;
+
+--Ejemplo 2:
+
+CREATE OR REPLACE PROCEDURE ajuste_salarial(
+i_id IN EMPLOYEES.employee_id%TYPE,
+i_porcentaje IN FLOAT
+)
+IS
+BEGIN
+	UPDATE EMPLOYEES
+	SET SALARY = SALARY + (1+i_porcentaje)
+	WHERE EMPLOYEE_ID=i_id;
+end ajuste_salarial;
+BEGIN
+	ajuste_salarial(100,0.1);
+END;
+
+--Ejemplo 3:
+
+CREATE OR REPLACE PROCEDURE obtener_datos_empleado(
+i_id IN EMPLOYEES.employee_id%TYPE,
+o_first_name OUT EMPLOYEES.first_name%TYPE,
+o_last_name OUT EMPLOYEES.last_name%TYPE,
+)
+IS
+BEGIN
+	SELECT FIRST_NAME, LAST_NAME
+	INTO o_first_name,o_last_name
+	FROM EMPLOYEES
+	WHERE EMPLOYEE_ID=i_id
+end obtener_datos_empleado;
+
+BEGIN
+	obtener_datos_empleado(100);
+END;
+
+
+--Paquetes (agrupar objetos almacenados en la BD) 
+--cabecera y cuerpo
+--declare: variable,cursores, excepciones, funciones procedimientos
+DROP PROCEDURE ajuste_salarial;
+DROP PROCEDURE obtener_datos_empleado;
+
+CREATE OR REPLACE PACKAGE hr_procedures IS 
+	
+	PROCEDURE ajuste_salarial(
+		i_id IN EMPLOYEES.employee_id%TYPE,
+		i_porcentaje IN FLOAT);
+	
+	PROCEDURE obtener_datos_empleado(
+		i_id IN EMPLOYEES.employee_id%TYPE,
+		o_first_name OUT EMPLOYEES.first_name%TYPE,
+		o_last_name OUT EMPLOYEES.last_name%TYPE,
+		);
+
+END hr_procedures;
+
+CREATE OR REPLACE PACKAGE BODY hr_procedures IS
+	
+	PROCEDURE ajuste_salarial(
+		i_id IN EMPLOYEES.employee_id%TYPE,
+		i_porcentaje IN FLOAT
+		) IS 
+		BEGIN
+			UPDATE EMPLOYEES
+			SET SALARY = SALARY + (1+i_porcentaje)
+			WHERE EMPLOYEE_ID=i_id;
+		end ajuste_salarial;
+	
+	PROCEDURE obtener_datos_empleado(
+		i_id IN EMPLOYEES.employee_id%TYPE,
+		o_first_name OUT EMPLOYEES.first_name%TYPE,
+		o_last_name OUT EMPLOYEES.last_name%TYPE,
+		) IS
+		BEGIN
+			SELECT FIRST_NAME, LAST_NAME
+			INTO o_first_name,o_last_name
+			FROM EMPLOYEES
+			WHERE EMPLOYEE_ID=i_id
+		end obtener_datos_empleado;
+END hr_procedures;
+
+DECLARE
+BEGIN
+	hr_procedures.ajuste_salarial(100);
+	hr_procedures.obtener_datos_empleado(100);
+END;
+
+DROP PACKAGE ;
+DROP PACKAGE BODY;
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