I have 2 Tables
(1)Customer - CustCode,.......
(2)CustTrans - CustCode, CaseClosed (boolean),.......
(will have multiple records of same CustCode)

I would like to get all rows from the Customer table, but
exclude those rows that the CustCode is found in the CustTrans
table AND with the CaseClosed status is "False".

How should my SQL statement be like, pls advise, thanks.