PL/SQL Conditional Statement - oracle

Question

This is regarding PL/SQL conditional statements. Since I'm new to this language, can someone help me to find the error on this code? The error msg is given below.
DECLARE
stock_rec stock%ROWTYPE;
var_company stock.company%TYPE := 'IBM';
BEGIN
SELECT * INTO stock_rec
FROM stock s
WHERE s.company = var_company;
BEGIN
IF (stock_rec.price < 45) THEN
DBMS_PUTPUT.PUT_LINE('Current price is very low !');
ELSIF (stock_rec.price >= 45 AND stock_rec.price < 55) THEN
DBMS_PUTPUT.PUT_LINE('Current price is low !');
ELSIF (stock_rec.price >= 55 AND stock_rec.price < 65) THEN
DBMS_PUTPUT.PUT_LINE('Current price is medium !');
ELSIF (stock_rec.price >= 65 AND stock_rec.price < 75) THEN
DBMS_PUTPUT.PUT_LINE('Current price is medium high !');
ELSE (stock_rec.price >= 75)
DBMS_PUTPUT.PUT_LINE('Current price is high !');
END IF;
END;
END;
/
-------error msg---------------------------------------------
ORA-06550: line 17, column 40:
PLS-00103: Encountered the symbol ")" when expecting one of the following:
& - + / at mod remainder rem <an exponent (**)> and or as
|| multiset
The symbol "* was inserted before ")" to continue.

Answer 1

The last ELSE should actually be ELSIF (and then you have THEN missing):
ELSIF (stock_rec.price >= 75) THEN
Also, you most probably don't need inner BEGIN-END.
DECLARE
stock_rec stock%ROWTYPE;
var_company stock.company%TYPE := 'IBM';
BEGIN
SELECT * INTO stock_rec
FROM stock s
WHERE s.company = var_company;
IF (stock_rec.price < 45) THEN
DBMS_PUTPUT.PUT_LINE('Current price is very low !');
ELSIF (stock_rec.price >= 45 AND stock_rec.price < 55) THEN
DBMS_PUTPUT.PUT_LINE('Current price is low !');
ELSIF (stock_rec.price >= 55 AND stock_rec.price < 65) THEN
DBMS_PUTPUT.PUT_LINE('Current price is medium !');
ELSIF (stock_rec.price >= 65 AND stock_rec.price < 75) THEN
DBMS_PUTPUT.PUT_LINE('Current price is medium high !');
ELSIF (stock_rec.price >= 75) THEN
DBMS_PUTPUT.PUT_LINE('Current price is high !');
END IF;
END;
/

Answer 2

You can simplify the code to use a single DBMS_OUTPUT.PUT_LINE statement if you use a CASE expression:
DECLARE
stock_rec stock%ROWTYPE;
var_company stock.company%TYPE := 'IBM';
BEGIN
SELECT *
INTO stock_rec
FROM stock
WHERE company = var_company;
DBMS_PUTPUT.PUT_LINE(
CASE
WHEN stock_rec.price < 45
THEN 'Current price is very low !'
WHEN stock_rec.price < 55
THEN 'Current price is low !'
WHEN stock_rec.price < 65
THEN 'Current price is medium !'
WHEN stock_rec.price < 75
THEN 'Current price is medium high !'
WHEN stock_rec.price >= 75
THEN 'Current price is high !'
ELSE NULL
END
);
END;
/