Stored Procedure in mySQL workbench (INSERT INTO error) - mysql

Question

I'm running into an error in my stored procedure, and after numerous YT videos and forums, I still have no clue where I'm going wrong. Given what I'm trying to do, it all seems to look correct.
Here's the deal. I take in some information to buy some stock, I use an IF to make sure that I have enough money to make the purchase, I then insert the purchase information into my TRADES table and update the cash balance in ACCOUNTS to reflect the spending of $$.
I can't even test to see if it works correctly because it won't run. The only error I'm getting is at INSERT INTO, in which it says error: INTO (into) is not valid input at this position
I have done ALL of my insert statements the exact same way, and have no idea why this particular syntax is incorrect? Any help would be greatly appreciated! Below are two approaches, both with errors.
CREATE PROCEDURE `BUY` (TID INT,ID INT, CASH INT, T_NAME VARCHAR(4) ,
TCOUNT INT, TBUYDATE DATE, TBUYPRICE INT )
BEGIN
IF (ACCOUNT.CASH_BALANCE >= (TCOUNT * TBUYPRICE),
INSERT INTO TRADES (TRADE_ID, ACCOUNT_ID, TRADE_NAME, TRADE_COUNT, TRADE_BUYDATE, TRADE_BUYPRICE)
VALUES (TID, ID, T_NAME, TCOUNT, TBUYDATE, TBUYPRICE)
AND UPDATE ACCOUNT.CASH_BALANCE
WHERE ACCOUNT.ACCOUNT_ID = ID
SET ACCOUNT.CASH_BALANCE = (ACCOUNT.CASH_BALANCE - (TCOUNT * TBUYPRICE)),
NULL
)
END
I have also tried the following, however I get an error on END missing subclause or other elements before end
CREATE PROCEDURE `BUY` (TID INT,ID INT, CASH INT, T_NAME VARCHAR(4) , TCOUNT
INT, TBUYDATE DATE, TBUYPRICE INT )
BEGIN
IF (ACCOUNT.CASH_BALANCE >= (TCOUNT * TBUYPRICE))
THEN
INSERT INTO TRADES (TRADE_ID, ACCOUNT_ID, TRADE_NAME, TRADE_COUNT,
TRADE_BUYDATE, TRADE_BUYPRICE)
VALUES (TID, ID, T_NAME, TCOUNT, TBUYDATE, TBUYPRICE);
UPDATE ACCOUNT.CASH_BALANCE
SET ACCOUNT.CASH_BALANCE = (ACCOUNT.CASH_BALANCE - (TCOUNT * TBUYPRICE))
WHERE ACCOUNT.ACCOUNT_ID = ID;
ELSE #noinsert
END

Answer 1

There are multiple errors/corrections:
The Delimiter command was not used, so he gets confused on the end of statement and the end of the procedure definition
The account table needs to be selected in an exists statement
I've used a local variable l_cash instead of repeating TCOUNT * TBUYPRICE (Not an error).
The ELSE statement was not necessary and an END IF; was missing.
Update statement corrected.
Here is the corrected code:
DELIMITER $$
CREATE PROCEDURE `BUY` (TID INT,ID INT, CASH INT, T_NAME VARCHAR(4) , TCOUNT
INT, TBUYDATE DATE, TBUYPRICE INT)
BEGIN
DECLARE l_cash INT DEFAULT 0;
SET l_cash = TCOUNT * TBUYPRICE;
IF EXISTS(SELECT 1 FROM Account WHERE ACCOUNT_ID = ID AND CASH_BALANCE >= l_cash) THEN
INSERT INTO TRADES (TRADE_ID, ACCOUNT_ID, TRADE_NAME, TRADE_COUNT,
TRADE_BUYDATE, TRADE_BUYPRICE)
VALUES (TID, ID, T_NAME, TCOUNT, TBUYDATE, TBUYPRICE);
UPDATE ACCOUNT
SET CASH_BALANCE = (CASH_BALANCE - l_cash)
WHERE ACCOUNT_ID = ID;
END IF;
END$$
DELIMITER ;