Update laboratory5.sql

km61/Mehediuk_Kateryna/laboratory5.sql

@@ -1,2 +1,50 @@
 -- LABORATORY WORK 5
 -- BY Mehediuk_Kateryna
+1
+create function count_order(cust_id in number, order_num in number)
+return number
+is
+count_order_num
+begin
+
+where counter = 'notnull'
+select 
+customers.cust_id;
+oredrs.order_num;
+from customers join orders
+customers.cust_id=orders.cust_id
+join orderitems
+orders.order_num=oredritems.order_num
+group by customers.cust_id,oredrs.order_num 
+return count_order_num
+end count_order;
+
+3
+create procedure update_order_date(order_num in number, order_date in number)
+is
+begin
+select count(order_num) in counter from orders
+if counter = '0' then
+raise_application_error
+elsif if counter = 'null' then
+raise_application_error
+else 
+select count(order_date) in counter from orders
+where order_date='old.oredr_date'
+update orders
+set order_date ='new.order_date'
+where order_date='old.oredr_date'
+end if;
+end;
+
+2
+create procedure return_cust_id(cust_name in varchar, cust_id in number)
+is
+begin
+select 
+customers.cust_id;
+customers.cust_name;
+from customers
+join customers.cust_name=customers.cust_id
+return cust_id
+end;