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StoredProcedures.sql
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StoredProcedures.sql
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--1) To list the details of a bill using Invoice number
CREATE or replace FUNCTION mypharmacystore.details_by_invoice(v_invo bigint)
RETURNS table(
q character varying
)
LANGUAGE 'plpgsql'
AS $BODY$
declare
r record;
query text;
begin
query:='select * from mypharmacystore.sold_to';
for r in execute query
loop
if(r.invoice_no=v_invo)then
q:=r.p_id;
return next;
end if;
end loop;
end
$BODY$;
--2) To find the total count of a particular product sold to a customer
CREATE or replace FUNCTION mypharmacystore.total_count_by_c_id_and_p_name(cus_id character varying,med_name character varying)
RETURNS int
LANGUAGE 'plpgsql'
AS $BODY$
declare
co int;
begin
select c_id,p_name,count(*) into co from product natural join sold_to where c_id = cus_id and p_name = med_name order by c_id,p_name;
return co;
end
$BODY$;
--3) Prescribed by a doctor
CREATE or replace FUNCTION mypharmacystore.ref_by_doctor_count(d_id character varying)
RETURNS table(
c_id character varying,
count int,
sum int
)
LANGUAGE 'plpgsql'
AS $BODY$
declare
r record;
cc_id character varying;
co int;
su int;
query text;
begin
query:='select doc_id, c_id,count(*)as co,sum(quantity_sold)as su from mypharmacystore.sold_to natural join mypharmacystore.referred_by group by doc_id, c_id';
for r in execute query
loop
if(r.doc_id=d_id)then
cc_id:=r.c_id;
co:=r.co;
su:=r.su;
return next;
end if;
end loop;
end
$BODY$;