NULL selection issue

Question

Hi
SELECT Count(T1.TaskID), T3.CODE, T1.CompletedPercent
from Task T1, Contract T2, T_Code T3
where  T1.LinkID = T2.ContID
and T2.ContCode  = T3.CODEID
and T1.CompPercent =
CASE T3.CODE
         WHEN 'Hold' THEN NULL
         WHEN 'Active' THEN NULL
         WHEN 'Completed' THEN 600.00
      END
Group By T3.CODE, T1.CompPercentIn the above query I get results as below
1832        'Completed'  600.00But when check below records also there
1500     Hold             NULL
1600     Active          NULLAny issue with the query regarding NULL values?
Cheers
Shabar

Answer 1

Hi, Shabar,
shabar wrote:
Hi Frank Kulash
Following is the sample data
WITH Task AS
(SELECT 'aaa' LinkID, NULL CompPercent FROM dual UNION ALL
SELECT 'bbb', NULL FROM dual UNION ALL
SELECT 'ccc', 600.00 FROM dual UNION ALL
SELECT 'bbb', NULL FROM dual UNION ALL
SELECT 'bbb', NULL FROM dual UNION ALL
SELECT 'ccc', 600.00 FROM dual UNION ALL
SELECT 'aaa', NULL FROM dual),
Contract AS
(SELECT 'c1' ContCode, 'aaa' ContID FROM dual UNION ALL
SELECT 'c2', 'bbb' FROM dual UNION ALL
SELECT 'c3', 'ccc' FROM dual),
T_Code AS
(SELECT 'c1' CODEID, 'Hold' CODE FROM dual UNION ALL
SELECT 'c2', 'Active' FROM dual UNION ALL
SELECT 'c3', 'Completed' FROM dual)
SELECT Count(T1.TaskID), T3.CODE, T1.CompletedPercent
from Task T1, Contract T2, T_Code T3
where  T1.LinkID = T2.ContID
and T2.ContCode  = T3.CODEID
and T1.CompPercent =
CASE T3.CODE
WHEN 'Hold' THEN NULL
WHEN 'Active' THEN NULL
WHEN 'Completed' THEN 600.00
END
Group By T3.CODE, T1.CompPercentI need to geth NULL value records as well
Cheers
ShabarThat query is referencing some columns that are not in the tables.
What are the results you want from that data? Are they what you posted before:
Count      Code                Value
1832        Completed'       600.00
1500        Hold                 NULL
1600        Active               NULL? If so, explain how you get the numbers in the first column from the sample data you posted.
What is wrong with the solutions I posted earlier?