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CREATE TABLE ActivityHX ( ITEM_ID nvarchar(5), LINE nvarchar(2), ACTIVITY_DATE date, ACTIVITY nvarchar(8) ); INSERT INTO ActivityHX (ITEM_ID, LINE, ACTIVITY_DATE, ACTIVITY) VALUES ('38003', '1', '20230803', 'OPENED'), ('38003', '2', '20230803', 'CLOSED'), ('38003', '3', '20230812', 'REOPENED'), ('38003', '4', '20230814', 'CLOSED');
4 rows affected
with mydata as (SELECT ITEM_ID ,LINE ,ACTIVITY_DATE ,ACTIVITY ,DATEDIFF(DAY, CASE WHEN ACTIVITY = 'CLOSED' THEN ACTIVITY_DATE END, CASE WHEN ACTIVITY IN ('OPENED', 'REOPENED') THEN ACTIVITY_DATE END) 'Diff' FROM ActivityHX) SELECT ITEM_ID ,CASE WHEN ACTIVITY IN ('OPENED', 'REOPENED') THEN ACTIVITY_DATE END 'START_DATE' ,CASE WHEN ACTIVITY = 'CLOSED' THEN ACTIVITY_DATE END 'END_DATE' FROM ( SELECT ITEM_ID ,ACTIVITY_DATE ,ACTIVITY ,Diff as 'Days Diff' ,ROW_NUMBER() OVER (PARTITION BY ITEM_ID ORDER BY CASE WHEN Diff <= 0 then -1 else 1 end, abs(Diff)) as RN from mydata) ActivityHX WHERE RN = 1;
ITEM_ID
START_DATE
END_DATE
38003
2023-08-03
null