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#21
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IIf statement
Barry wrote: we must make an intelligent decision as to a priority of summing the [Result] values if there is any null value in [Qual] within the [Lab_id] group, rather than taking the max of the [Result] if all [Qual] values in a [Lab_id] This is an example of the test data: NAME DATE LAB_ID ANALYTE RESULT QUAL RW-6 2/24/2006 711721 o-Xylene 0.4 ND RW-5 2/24/2006 711722 o-Xylene 0.4 ND RW-1 2/24/2006 711723 m+p-Xylene 2800 RW-1 2/24/2006 711723 o-Xylene 1900 Duplicate 2/24/2006 711724 m+p-Xylene 2500 Duplicate 2/24/2006 711724 o-Xylene 1700 Here's my latest attempt: Create the test table: CREATE TABLE Xylenes ( NAME VARCHAR(12) NOT NULL, [DATE] DATETIME NOT NULL, LAB_ID CHAR(6) NOT NULL, ANALYTE VARCHAR(15) NOT NULL, [RESULT] DECIMAL(17, 2) NOT NULL, QUAL CHAR(2) ) ; Create test data: INSERT INTO Xylenes ( NAME, [DATE], LAB_ID, ANALYTE, [RESULT], QUAL) VALUES ('RW-6', #2006-02-24 00:00:00#, '711721', 'o-Xylene', 0.4, 'ND') ; INSERT INTO Xylenes ( NAME, [DATE], LAB_ID, ANALYTE, [RESULT], QUAL) SELECT DT1.NAME, DT1.[DATE], DT1.LAB_ID, DT1.ANALYTE, DT1.[RESULT], DT1.QUAL FROM ( SELECT 'RW-5' AS NAME, #2006-02-24 00:00:00# AS [DATE], '711722' AS LAB_ID, 'o-Xylene' AS ANALYTE, 0.4 AS [RESULT], 'ND' AS QUAL FROM Xylenes UNION ALL SELECT 'RW-1', #2006-02-24 00:00:00#, '711723', 'm+p-Xylene', 2800, NULL FROM Xylenes UNION ALL SELECT 'RW-1', #2006-02-24 00:00:00#, '711723', 'o-Xylene', 1900, NULL FROM Xylenes UNION ALL SELECT 'Duplicate', #2006-02-24 00:00:00#, '711724', 'm+p-Xylene', 2500, NULL FROM Xylenes UNION ALL SELECT 'Duplicate', #2006-02-24 00:00:00#, '711724', 'o-Xylene', 1700, NULL FROM Xylenes ) AS DT1 ; The proposed solution: SELECT X1.LAB_ID, 'sum_of' AS aggregate_type, SUM(X1.[RESULT]) AS aggregate_value FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'max_of', MAX(X1.[RESULT]) FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID ORDER BY 1 ; Jamie. -- |
#22
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IIf statement
I got the SUM expression wrong. It should read
SUM(IIF(Qual is Null,Result, Null)) or SUM(IIF(Qual is Not Null,Null, Result)) SELECT LAB_ID , IIF(Exists( SELECT * FROM YourTable as T2 WHERE Qual Is Null and T2.Lab_ID = T1.Lab_ID) , SUM(IIF(Qual is Null,Result, Null)) , Max(IIF(Qual is Null, Null,Result))) as CalcResult FROM TheTable as T1 GROUP BY T1.LAB_ID "Barry" wrote in message ... I think it would somehow take a combination of the expression you first suggested and one such as this "select iif(isnull(Qual, sum(Result), max(Result))) from table" -- Barry Guidry "John Spencer" wrote: Still not clear. Lab Group has a record with qual as Null, ---sum ALL the results for that lab group or ---sum only the results that have null ** Lab Group has a record with Qual that has a value ---get max of ALL the results for that lab group or ---get max of only the results that have a value in qual ** Assuming that you want the ones marked with **, I would try the following. SELECT LAB_ID , IIF(Exists( SELECT * FROM YourTable as T2 WHERE Qual Is Null and T2.Lab_ID = T1.Lab_ID) , SUM(IIF(Qual is Null,Null, Result)) , Max(IIF(Qual is Null, Null,Result))) as CalcResult FROM TheTable as T1 GROUP BY T1.LAB_ID "Barry" wrote in message ... Yes, you are right, except If any lab_Id group has ANY quals null then get the sum of the Results (and would like for it to first check for this, as the higher priority). Then check If any Lab_ID group has qual that is not null then get the max of the Result where the qual is not null. Thanks -- Barry Guidry "John Spencer" wrote: I am confused about what you want to do. What are the rules that you want to use? Are your rules? If any Lab_ID group has qual that is not null then get the max of the Result where the qual is not null. If any lab_Id group has all quals null then get the sum of the Results Or are they something else? This will get the Max result of only those records where Qual has a value. Max(IIF(Qual is Null, Null,Result)) This will get the SUM of Result where Qual has no value SUM(IIF(Qual is Null,Null, Result)) But before I propose anything else, I would want to know the exact rules that should be used to do the calculation. "Barry" wrote in message ... John, do you think there is a way to add something in the body of your expression, "...WHERE Qual Is Null and T2.Lab_ID = T1.Lab_ID) , Sum(Result) , Max(Result)) as CalcResult..." so that it will Sum(Result) only IF Qual is Null and/or Max(Result) only IF Qual is not null? -- Barry Guidry "John Spencer" wrote: The following untested SQL might work for you. IT may or may not work, I didn't have a way to test it. SELECT LAB_ID , IIF(Exists( SELECT * FROM YourTable as T2 WHERE Qual Is Null and T2.Lab_ID = T1.Lab_ID) , Sum(Result) , Max(Result)) as CalcResult FROM TheTable as T1 GROUP BY T1.LAB_ID That checks to see if any value in the Qual field for a lab_id is Null. If at least one value is null, then it SUMS all the values. If none of the values are null then it gets the Max. IF I have misunderstood your requirement, then I apologize for wasting your time. "Barry" wrote in message news Duane, that returned one value of "2800" from one group of [Lab_id] in which [Qual] was a null value. This is a start but the idea was to have it sum both values of the [Lab_id] group "711723" which would have been "2800" + "1900"="4700". You know, as I pondered over my given situation some more, I have come to believe that this will be impossible in Access due to the simple fact that when we usually perform this operation in Excel we must make an intelligent decision as to a priority of summing the [Result] values if there is any null value in [Qual] within the [Lab_id] group, rather than taking the max of the [Result] if all [Qual] values in a [Lab_id] group are not null. You see, I do not see if it will even be possible to set a priority such as this in Access (to first search [Qual] for a null value and sum rather than max the [Result]). This is an example of the test data: NAME DATE LAB_ID ANALYTE RESULT QUAL RW-6 2/24/2006 711721 o-Xylene 0.4 ND RW-5 2/24/2006 711722 o-Xylene 0.4 ND RW-1 2/24/2006 711723 m+p-Xylene 2800 RW-1 2/24/2006 711723 o-Xylene 1900 Duplicate 2/24/2006 711724 m+p-Xylene 2500 Duplicate 2/24/2006 711724 o-Xylene 1700 -- Barry Guidry "Duane Hookom" wrote: You might want to use this as a starting point: SELECT Lab_ID, IIf(IsNull(Max([Qual])),Sum([Result]),Max([Result])) AS Expr1 FROM Xylenes GROUP BY Xylenes.Lab_ID; -- Duane Hookom Microsoft Access MVP "Barry" wrote: I am trying a SQL statement such as "SELECT Max(IIf([Qual] Is Not Null,[Result],0), Sum(IIf([Qual] Is Null,[Result],0)) AS Expr1 FROM xylenes;" to try to combine the two actions (sum or max) but it is returning an error that I have a syntax error, missing operator. I have never queried in SQL View, so any advice as to how I can correct the above type of action would be appreciated. -- Barry Guidry "Duane Hookom" wrote: If I understand correctly, Allen Browne's suggestion should work. It's difficult to determine since you included a data record 4... ...2222 that seems to be ignored and the "4" is the same as the result you are expecting from the Result column. -- Duane Hookom Microsoft Access MVP "Barry" wrote: Yes, Duane you are right...the null field is based on each record, but I would like the statement to sum the values [Result] if there are any rows of null values in the other field [Qual]. Example: 'Result' 'Qual' 'Lab_id' 1 1111 2 J 1111 3 1111 4 2222 ---------------------------- 4 1111 ('Result' being equal to four because the 'Result' "1" and "3" both have 'Qual' as "null" and the same 'Lab_id' as "1111"). The [Lab_id] is the field I want the query to sort the data, and calculation, by. Is there any way to do this without specifying specific values in the statement, but rather all values that are the same? -- Barry Guidry "Duane Hookom" wrote: I think you need to provide some context and sample data as well as desired results. Sum and Max work against a group of records while "another field is null" seems to work against just a single record. -- Duane Hookom Microsoft Access MVP "Barry" wrote: I would like to make a query on a table on one field to 'sum' or 'max' the field based on 'if' another field is null or not. Any idea on how I would go about this? Please be generous as I am not an Access expert :-) -- Barry |
#23
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IIf statement
Jamie Collins wrote: The proposed solution snipped After peeking at John Spencer's proposal: SELECT X1.LAB_ID, 'sum_of' AS aggregate_type, SUM(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) AS aggregate_value FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'max_of', MAX(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID ORDER BY 1; Jamie. -- |
#24
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IIf statement
Jamie that was very close to doing the trick. I have adapted it a bit to
achieve even a closer result (I don't know why) but what I have changed it to is listed below (and below that is the results yielded). The only problem with it now is it excluded one max value of "0.4" [Result] from the [Lab_id] "711722". That seems strange to me because it did max the other similar row of data, value "0.4" [Result] from [Lab_id] "711721". Thank you very much, Jamie, and I would greatly appreciate it if you have any idea why the one row of data may have been excluded. SELECT X1.LAB_ID, 'max_of' AS aggregate_type, MAX(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) AS aggregate_value FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'sum_of', SUM(IIF(X1.QUAL IS NOT NULL, NOT NULL, X1.[RESULT])) FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NOT NULL ) GROUP BY X1.LAB_ID ORDER BY 1; Results: LAB_ID aggregate_type aggregate_value 711721 max_of 0.4 711723 sum_of 4700 711723 max_of 711724 sum_of 4200 711724 max_of -- Barry Guidry "Jamie Collins" wrote: Jamie Collins wrote: The proposed solution snipped After peeking at John Spencer's proposal: SELECT X1.LAB_ID, 'sum_of' AS aggregate_type, SUM(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) AS aggregate_value FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'max_of', MAX(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID ORDER BY 1; Jamie. -- |
#25
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IIf statement
Sorry, after analyzing the results a bit more I realized that it is also
prioritizing the results with a not null [Qual], rather than the opposite. I realized this after adding another row of null [Qual] data with same [Lab_id] as a row with a not null [Qual]. And, it seems to be excluding the row of data that contained only one row of data in a select single [Lab_id] group. -- Barry Guidry "Jamie Collins" wrote: Jamie Collins wrote: The proposed solution snipped After peeking at John Spencer's proposal: SELECT X1.LAB_ID, 'sum_of' AS aggregate_type, SUM(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) AS aggregate_value FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'max_of', MAX(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID ORDER BY 1; Jamie. -- |
#26
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IIf statement
Jamie Collins wrote: After peeking at John Spencer's proposal snipped And after a peek at John's revised proposal: SELECT X1.LAB_ID, 'sum_of' AS aggregate_type, SUM(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) AS aggregate_value FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'max_of', MAX(IIF(X1.QUAL IS NULL, X1.[RESULT], NULL)) FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID ORDER BY 1; Jamie. -- |
#27
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IIf statement
Barry wrote: Sorry, after analyzing the results a bit more I realized that it is also prioritizing the results with a not null [Qual], rather than the opposite. I realized this after adding another row of null [Qual] data with same [Lab_id] as a row with a not null [Qual]. And, it seems to be excluding the row of data that contained only one row of data in a select single [Lab_id] group. Barry, If you are going to change the test data set (e.g. for the better) please post it (rather than describe it) along with the expected results. I took the time to post SQL DDL code to create the test table and the test data using INSERT statements; it would be nice if you could make similar efforts to keep us up to speed. I suspect I'm not the only one finding the changing spec/data situation a little frustrating, albeit a good challenge g. Jamie. -- |
#28
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IIf statement
I have gotten even closer to my end result by adapting the SQL expression to
this: SELECT X1.LAB_ID, 'max_of' AS aggregate_type, MAX(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) AS aggregate_value FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'sum_of', SUM(IIF(X1.QUAL IS NOT NULL, NOT NULL, X1.[RESULT])) FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NOT NULL ) GROUP BY X1.LAB_ID ORDER BY 1; by reversing the order of the "SUM" and "MAX" functions, as well as the "WHERE/WHERE NOT EXISTS", to yield these results: LAB_ID aggregate_type aggregate_value 711721 sum_of 2 711722 sum_of 711722 max_of 0.4 711723 sum_of 4700 from this set of test data (added a couple more rows to original dataset): SAMPLE DATE LAB_ID ANALYTE RESULT QUAL RW-6 2/24/2006 711721 o-Xylene 0.4 ND RW-6 2/24/2006 711721 o-Xylene 2 RW-5 2/24/2006 711722 o-Xylene 0.4 ND RW-1 2/24/2006 711723 m+p-Xylene 2800 RW-1 2/24/2006 711723 o-Xylene 1900 RW-1 2/24/2006 711723 m+p-Xylene 1 ND Duplicate 2/24/2006 711724 m+p-Xylene 2500 Duplicate 2/24/2006 711724 o-Xylene 1700 So, the SQL is accurately selecting and sums the results with null [Qual]'s over those with not null [Qual]'s (very good). The only issue that remains is that it did not include a SUM of the two rows of data with the [Lab_id] = "711724"; it appears for some reason that it was due to both rows of data having null [Qual]'s. Maybe because it is only comparing null/not null [Qual]'s and not additionally only summing the results of data with all null [Qual]'s in the same group [Lab_id], right?? -- Barry Guidry "Jamie Collins" wrote: Jamie Collins wrote: The proposed solution snipped After peeking at John Spencer's proposal: SELECT X1.LAB_ID, 'sum_of' AS aggregate_type, SUM(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) AS aggregate_value FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'max_of', MAX(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID ORDER BY 1; Jamie. -- |
#29
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IIf statement
I am sorry to be such a nuisance on this topic, but I feel that we are very
close to solving this issue. This is a common query of data in the environmental science field that I believe many can benefit from once complete, including other Access techies possibly. -- Barry Guidry "Barry" wrote: I have gotten even closer to my end result by adapting the SQL expression to this: SELECT X1.LAB_ID, 'max_of' AS aggregate_type, MAX(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) AS aggregate_value FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'sum_of', SUM(IIF(X1.QUAL IS NOT NULL, NOT NULL, X1.[RESULT])) FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NOT NULL ) GROUP BY X1.LAB_ID ORDER BY 1; by reversing the order of the "SUM" and "MAX" functions, as well as the "WHERE/WHERE NOT EXISTS", to yield these results: LAB_ID aggregate_type aggregate_value 711721 sum_of 2 711722 sum_of 711722 max_of 0.4 711723 sum_of 4700 from this set of test data (added a couple more rows to original dataset): SAMPLE DATE LAB_ID ANALYTE RESULT QUAL RW-6 2/24/2006 711721 o-Xylene 0.4 ND RW-6 2/24/2006 711721 o-Xylene 2 RW-5 2/24/2006 711722 o-Xylene 0.4 ND RW-1 2/24/2006 711723 m+p-Xylene 2800 RW-1 2/24/2006 711723 o-Xylene 1900 RW-1 2/24/2006 711723 m+p-Xylene 1 ND Duplicate 2/24/2006 711724 m+p-Xylene 2500 Duplicate 2/24/2006 711724 o-Xylene 1700 So, the SQL is accurately selecting and sums the results with null [Qual]'s over those with not null [Qual]'s (very good). The only issue that remains is that it did not include a SUM of the two rows of data with the [Lab_id] = "711724"; it appears for some reason that it was due to both rows of data having null [Qual]'s. Maybe because it is only comparing null/not null [Qual]'s and not additionally only summing the results of data with all null [Qual]'s in the same group [Lab_id], right?? -- Barry Guidry "Jamie Collins" wrote: Jamie Collins wrote: The proposed solution snipped After peeking at John Spencer's proposal: SELECT X1.LAB_ID, 'sum_of' AS aggregate_type, SUM(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) AS aggregate_value FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'max_of', MAX(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID ORDER BY 1; Jamie. -- |
#30
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IIf statement
Barry wrote: I have gotten even closer to my end result by adapting the SQL expression to this: SELECT X1.LAB_ID, 'max_of' AS aggregate_type, MAX(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) AS aggregate_value FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'sum_of', SUM(IIF(X1.QUAL IS NOT NULL, NOT NULL, X1.[RESULT])) FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NOT NULL ) GROUP BY X1.LAB_ID ORDER BY 1; by reversing the order of the "SUM" and "MAX" functions, as well as the "WHERE/WHERE NOT EXISTS", to yield these results: LAB_ID aggregate_type aggregate_value 711721 sum_of 2 711722 sum_of 711722 max_of 0.4 711723 sum_of 4700 from this set of test data (added a couple more rows to original dataset): SAMPLE DATE LAB_ID ANALYTE RESULT QUAL RW-6 2/24/2006 711721 o-Xylene 0.4 ND RW-6 2/24/2006 711721 o-Xylene 2 RW-5 2/24/2006 711722 o-Xylene 0.4 ND RW-1 2/24/2006 711723 m+p-Xylene 2800 RW-1 2/24/2006 711723 o-Xylene 1900 RW-1 2/24/2006 711723 m+p-Xylene 1 ND Duplicate 2/24/2006 711724 m+p-Xylene 2500 Duplicate 2/24/2006 711724 o-Xylene 1700 So, the SQL is accurately selecting and sums the results with null [Qual]'s over those with not null [Qual]'s (very good). The only issue that remains is that it did not include a SUM of the two rows of data with the [Lab_id] = "711724"; it appears for some reason that it was due to both rows of data having null [Qual]'s. Maybe because it is only comparing null/not null [Qual]'s and not additionally only summing the results of data with all null [Qual]'s in the same group [Lab_id], right?? This? SELECT X1.LAB_ID, 'max_of' AS aggregate_type, MAX(IIF(X1.QUAL IS NULL, NULL, X1.[RESULT])) AS aggregate_value FROM Xylenes AS X1 WHERE NOT EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID UNION ALL SELECT X1.LAB_ID, 'sum_of', SUM(IIF(X1.QUAL IS NULL, X1.[RESULT], NULL)) FROM Xylenes AS X1 WHERE EXISTS ( SELECT * FROM Xylenes AS X2 WHERE X2.LAB_ID = X1.LAB_ID AND X2.QUAL IS NULL ) GROUP BY X1.LAB_ID ORDER BY 1; Jamie. -- |
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