Access query in MySQL - IIF and SUM function

Hi,
I'm planning to have MySQL instead of Access 2k3 as back-end.
I'll keep the Access-DB as front-end.

I have mainly 3 types of queries in Access. Would like to see how they look like as a MySQL view.
(MySQL 5.0.27 / MyODBC 3.x and 5.0.11)

1.) with Access IIf function and some calculation:
========================================
SELECT
tblL5LAT.tblL5CAUTOID,
IIf(([LengteAfgekort]),[LengteAfgekort],[REALLengte]) AS BerLengte,
([BerLengte]*[REALStuks]) AS StrekkendeMetersPerLengteInPak
FROM tblL5LAT;

2.) with Access SUM-function (probably the same as Qry 1 ?!?)
====================================================
SELECT
tblL4LAT.LATPakID,
Sum(qryLATSubBer_A.StrekkendeMetersPerLengteInPak) AS SumOfStrekkendeMetersPerLengteInPak
FROM tblL4LAT LEFT JOIN (tblL5LAT LEFT JOIN qryLATSubBer_A ON tblL5LAT.tblL5CAUTOID = qryLATSubBer_A.tblL5CAUTOID) ON tblL4LAT.tbl4LATAUTO = tblL5LAT.tblL4LATID
GROUP BY tblL4LAT.LATPakID;

3.) Filter on a certain Access form-field. For report purposes.
==================================================
SELECT qryJaarOverzichtPRINT.*
FROM qryJaarOverzichtPRINT
WHERE (((qryJaarOverzichtPRINT.VerkoopcontractID)=[Forms]![frmVerkoopcontractOverzicht]![VerkoopcontractID]));