How to loop through a query in LINQPAD?

I have this query in LINQPAD:

SELECT TIME_TEST+TIME_STEP AS Productive_Time
FROM PFODS.PPL_TESTSYSTEMS_UTILISATION
WHERE (SYSTEMTYPE = '0005-064') AND
(TS_START >= to_date('13/01/2014', 'DD/MM/YYYY'))
AND (TS_End <= to_date('18/01/2014 00:1:59', 'DD/MM/YYYY HH24:MI:SS')) AND MONO != '9999999999'
Order by TS_START ASC

However, I need to extract out the SELECT SUM(TIME_TEST+TIME_STEP) as ProductiveTime on a daily basis, and thus I need to execute those below codes each time to extract out each day values. How do I combine those into 1 single query such that each day data can be displayed? Do I need to write a loop inside the WHERE condition?

SELECT SUM(TIME_TEST+TIME_STEP) as ProductiveTime
FROM PFODS.PPL_TESTSYSTEMS_UTILISATION
WHERE (SYSTEMTYPE = '0005-064') AND
(TS_START >= to_date('13/01/2014', 'DD/MM/YYYY'))
AND (TS_End <= to_date('14/01/2014 00:1:59', 'DD/MM/YYYY HH24:MI:SS')) AND MONO != '9999999999'
Order by TS_START ASC

SELECT SUM(TIME_TEST+TIME_STEP) as ProductiveTime
FROM PFODS.PPL_TESTSYSTEMS_UTILISATION
WHERE (SYSTEMTYPE = '0005-064') AND
(TS_START >= to_date('14/01/2014', 'DD/MM/YYYY'))
AND (TS_End <= to_date('15/01/2014 00:1:59', 'DD/MM/YYYY HH24:MI:SS')) AND MONO != '9999999999'
Order by TS_START ASC

SELECT SUM(TIME_TEST+TIME_STEP) as ProductiveTime
FROM PFODS.PPL_TESTSYSTEMS_UTILISATION
WHERE (SYSTEMTYPE = '0005-064') AND
(TS_START >= to_date('15/01/2014', 'DD/MM/YYYY'))
AND (TS_End <= to_date('16/01/2014 00:1:59', 'DD/MM/YYYY HH24:MI:SS')) AND MONO != '9999999999'
Order by TS_START ASC

SELECT SUM(TIME_TEST+TIME_STEP) as ProductiveTime
FROM PFODS.PPL_TESTSYSTEMS_UTILISATION
WHERE (SYSTEMTYPE = '0005-064') AND
(TS_START >= to_date('16/01/2014', 'DD/MM/YYYY'))
AND (TS_End <= to_date('17/01/2014 00:1:59', 'DD/MM/YYYY HH24:MI:SS')) AND MONO != '9999999999'
Order by TS_START ASC

SELECT SUM(TIME_TEST+TIME_STEP) as ProductiveTime
FROM PFODS.PPL_TESTSYSTEMS_UTILISATION
WHERE (SYSTEMTYPE = '0005-064') AND
(TS_START >= to_date('17/01/2014', 'DD/MM/YYYY'))
AND (TS_End <= to_date('18/01/2014 00:1:59', 'DD/MM/YYYY HH24:MI:SS')) AND MONO != '9999999999'
Order by TS_START ASC

In addition to display the SUM(TIME_TEST+TIME_STEP) for each day, I also need to display the date itself.

thanks.