How to reference a table in a Sub-Sub Query - sql

Question

I have the following tables:
Bradford_Score_Bands
BandNo InclusiveScore
------------------------
1 0
2 150
3 500
Bradford_Scores
ClockNo Dated Score
--------------------------------
2 30/10/14 123
99 30/10/14 3
2 29/10/14 101
99 29/10/14 8
Employees
ClockNo
--------------------
2
3
99
My aim is to work out the BandNo for each ClockNo for today and yesterday based on their score
I can find the correct BandNo based on a score value like this:
SELECT MIN(BandNo) FROM Bradford_Score_Bands WHERE InclusiveScore >= 123
I can find the score for today and yesterday for each person like this:
SELECT DISTINCT EMP.ClockNo,
ISNULL((SELECT Score FROM Bradford_Scores BFT WHERE Dated = '2014-10-30' AND BFT.ClockNo = EMP.ClockNo), 0) As ScoreToday,
ISNULL((SELECT Score FROM Bradford_Scores BFT WHERE Dated = '2014-10-29' AND BFT.ClockNo = EMP.ClockNo), 0) As ScoreYesterday
FROM Employees EMP
But I can't seem to be able to combine the two. I thought something like this would work:
SELECT DISTINCT EMP.ClockNo,
(SELECT MIN(BandNo) FROM Bradford_Score_Bands WHERE InclusiveScore >=
(SELECT Score FROM Bradford_Scores BFT1 WHERE Dated = '2014-10-30' AND BFT1.ClockNo = EMP.ClockNo)),
(SELECT MIN(BandNo) FROM Bradford_Score_Bands WHERE InclusiveScore >=
(SELECT Score FROM Bradford_Scores BFT2 WHERE Dated = '2014-10-29' AND BFT2.ClockNo = EMP.ClockNo))
FROM Employees EMP
But the parts in the subquery where I reference BFTX.ClockNo = EMP.ClockNo seem to be causing the query to fail. I get the helpful pervasive error "Data Record ManagerCurrency not on a record"
EDIT:
I tried this exact same query in SQL Server and it works, so is there a way to re-write this to make it more Pervasive friendly?

Answer 1

Now this is tagged with SQL Server I don't feel the need to write a pervasive query that works.
I took your original query and rewrote it in a simpler fashion. Maybe try this and see if it solves your problem?
DECLARE #Bradford_Score_Bands TABLE (BandNo INT, InclusiveScore INT);
INSERT INTO #Bradford_Score_Bands VALUES (1, 0);
INSERT INTO #Bradford_Score_Bands VALUES (2, 150);
INSERT INTO #Bradford_Score_Bands VALUES (3, 500);
DECLARE #Bradford_Scores TABLE (ClockNo INT, Dated DATE, Score INT);
INSERT INTO #Bradford_Scores VALUES (2, '20141030', 123);
INSERT INTO #Bradford_Scores VALUES (99, '20141030', 3);
INSERT INTO #Bradford_Scores VALUES (2, '20141029', 101);
INSERT INTO #Bradford_Scores VALUES (99, '20141029', 8);
DECLARE #Employees TABLE (ClockNo INT);
INSERT INTO #Employees VALUES (2);
INSERT INTO #Employees VALUES (3);
INSERT INTO #Employees VALUES (99);
--Original Query
SELECT DISTINCT
EMP.ClockNo,
(SELECT MIN(BandNo) FROM #Bradford_Score_Bands WHERE InclusiveScore >= (SELECT Score FROM #Bradford_Scores BFT1 WHERE Dated = '2014-10-30' AND BFT1.ClockNo = EMP.ClockNo)),
(SELECT MIN(BandNo) FROM #Bradford_Score_Bands WHERE InclusiveScore >= (SELECT Score FROM #Bradford_Scores BFT2 WHERE Dated = '2014-10-29' AND BFT2.ClockNo = EMP.ClockNo))
FROM
#Employees EMP;
--New query
SELECT
e.ClockNo,
MIN(bsbt.BandNo),
MIN(bsby.BandNo)
FROM
#Employees e
LEFT JOIN #Bradford_Scores bst ON bst.ClockNo = e.ClockNo AND bst.Dated = '20141030'
LEFT JOIN #Bradford_Scores bsy ON bsy.ClockNo = e.ClockNo AND bsy.Dated = '20141029'
LEFT JOIN #Bradford_Score_Bands bsbt ON bsbt.InclusiveScore >= bst.Score
LEFT JOIN #Bradford_Score_Bands bsby ON bsby.InclusiveScore >= bsy.Score
GROUP BY
e.ClockNo;
I got exactly the same results for both queries when running this on SQL Server.