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2_deklaracio.sql
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SELECT * FROM orders;
SELECT * FROM customers order by city;
/* Alap adattípusok */
DECLARE
sOrderID NUMBER := 40;
dOrderDate DATE;
sStatus VARCHAR2(25) DEFAULT 'Credit Card';
BEGIN
dbms_output.put_line('Order ID: ' || sOrderID);
dbms_output.put_line('Order date: ' || to_char(dOrderDate, 'yyyy.mm.dd'));
dbms_output.put_line('Status: ' || sStatus);
END;
-- Output
--------------------------
-- Order ID: 40
-- Order date:
-- Status: Credit Card
--------------------------
/* %TYPE */
DECLARE
nShippingFee orders.shipping_fee%TYPE DEFAULT 10;
nRate CONSTANT NUMBER := 275;
nSzallitasiKoltseg nShippingFee%TYPE;
BEGIN
dbms_output.put_line('Shipping fee: ' || nShippingFee || ' USD');
nSzallitasiKoltseg := nShippingFee * nRate;
dbms_output.put_line('Szállítási ktg: ' || nSzallitasiKoltseg || ' HUF');
END;
-- Output
--------------------------
-- Shipping fee: 10 USD
-- Szállítási ktg: 2750 HUF
--------------------------
/* %ROWTYPE */
DECLARE
rCustomerRecord customers%ROWTYPE;
BEGIN
SELECT * INTO rCustomerRecord FROM customers WHERE customer_id = 9;
dbms_output.put_line(rCustomerRecord.last_name || ', ' ||
rCustomerRecord.first_name);
END;
-- Output
--------------------------
-- Mortensen, Sven
--------------------------
/* RECORD */
DECLARE
TYPE rt_CustomerRecord IS RECORD(
customer_id customers.customer_id%TYPE,
city customers.city%TYPE);
rCustomerRecord rt_CustomerRecord;
BEGIN
SELECT customer_id, city
INTO rCustomerRecord
FROM customers
WHERE customer_id = 17;
dbms_output.put_line(rCustomerRecord.city);
END;
-- Output
--------------------------
-- Seattle
--------------------------
/* Tömb */
DECLARE
TYPE tStringTomb IS VARRAY(10) OF VARCHAR2(10);
aStringTomb tStringTomb := tStringTomb();
BEGIN
aStringTomb.extend(10);
aStringTomb(1) := 'izé';
aStringTomb(3) := 'bizé';
dbms_output.put_line(aStringTomb(1));
dbms_output.put_line(aStringTomb(2));
dbms_output.put_line(aStringTomb(3));
END;
-- Output
--------------------------
-- izé
--
-- bizé
--------------------------
/* Asszociatív tömb */
DECLARE
TYPE atHonapUtolsoNapja IS TABLE OF NUMBER INDEX BY VARCHAR2(15);
at_HonapUtolsoNapja atHonapUtolsoNapja;
BEGIN
at_HonapUtolsoNapja('január') := 31;
at_HonapUtolsoNapja('február') := 28;
dbms_output.put_line(at_HonapUtolsoNapja('január'));
dbms_output.put_line(at_HonapUtolsoNapja('február'));
END;
-- Output
--------------------------
-- 31
-- 28
--------------------------
/* Beágyazott tábla */
CREATE TYPE szerzo AS TABLE OF VARCHAR2(50);
CREATE TABLE konyv (
id NUMBER,
cim VARCHAR2(500),
szerzok szerzo)
NESTED TABLE szerzok STORE AS szerzok_oszlop;
INSERT INTO konyv
VALUES
(1,
'Gitáriskola',
szerzo('Muszty Bea',
'Dobay András'));
INSERT INTO konyv
VALUES
(2,
'Modern vállalati pénzügyek',
szerzo('Brealy, Richard A.',
'Myers, Stewart C. '));
DROP TABLE konyv;
DROP TYPE szerzo;
/* Implicit kurzor */
DECLARE
sCity customers.city%TYPE;
BEGIN
SELECT city
INTO sCity
FROM customers
WHERE customer_id = 17;
dbms_output.put_line(sCity);
END;
-- Output
--------------------------
-- Seattle
--------------------------
/* Explicit kurzor */
DECLARE
sCity customers.city%TYPE;
CURSOR cCity IS
SELECT city
FROM customers
WHERE customer_id IN (17, 23);
BEGIN
OPEN cCity;
LOOP
FETCH cCity INTO sCity;
EXIT WHEN cCity%NOTFOUND;
DBMS_OUTPUT.PUT_LINE(sCity);
END LOOP;
CLOSE cCity;
END;
-- Output
--------------------------
-- Seattle
-- Portland
--------------------------
/* Kurzor paraméterezése */
DECLARE
CURSOR cOrders(nShippingFee NUMBER) IS
SELECT ship_name, SUM(shipping_fee)
FROM orders
WHERE shipping_fee >= nShippingFee
GROUP BY ship_name
ORDER BY SUM(shipping_fee) DESC;
sShipName orders.ship_name%TYPE;
nSumShippingFee orders.shipping_fee%TYPE;
BEGIN
OPEN cOrders(200);
LOOP
FETCH cOrders
INTO sShipName, nSumShippingFee;
EXIT WHEN cOrders%NOTFOUND;
dbms_output.put_line(nSumShippingFee || ' - ' || sShipName);
END LOOP;
CLOSE cOrders;
END;
-- Output
----------------------------------
-- 600 - Francisco Pérez-Olaeta
-- 400 - Karen Toh
-- 400 - Soo Jung Lee
----------------------------------
/* Kurzorváltozó */
DECLARE
TYPE ctCustomer IS REF CURSOR RETURN customers%ROWTYPE;
cCustomer ctCustomer;
rCustomer customers%ROWTYPE;
SCustomerName VARCHAR2(500);
BEGIN
DBMS_OUTPUT.PUT_LINE('<<-- Boston -->>');
OPEN cCustomer FOR
SELECT * FROM customers WHERE city = 'Boston';
LOOP
FETCH cCustomer INTO rCustomer;
EXIT WHEN cCustomer%NOTFOUND;
SCustomerName := rCustomer.last_name || ', ' ||
rCustomer.first_name;
DBMS_OUTPUT.PUT_LINE(SCustomerName);
END LOOP;
--CLOSE cCustomer;
dbms_output.new_line;
DBMS_OUTPUT.PUT_LINE('<<-- Milwaukee -->>');
OPEN cCustomer FOR
SELECT * FROM customers WHERE city = 'Milwaukee';
LOOP
FETCH cCustomer INTO rCustomer;
EXIT WHEN cCustomer%NOTFOUND;
SCustomerName := rCustomer.last_name || ', ' ||
rCustomer.first_name;
DBMS_OUTPUT.PUT_LINE(SCustomerName);
END LOOP;
CLOSE cCustomer;
END;