[英]Date difference between non-consecutive rows with random time differences and group between rows in T-SQL
[英]T-SQL query to show only differences between rows
一种选择是自我联接:
SELECT DISTINCT t1.unitId
FROM yourTable t1
INNER JOIN yourTable t2
ON t1.unitId = t2.unitId AND
t1.id <> t2.id AND
t1.cleanCode <> t2.cleanCode AND
t1.stat <> t2.stat;
我在您的样本数据中添加了一条额外的记录,因为您实际显示给我们的任何数据都不会最终出现在您的预期结果集中。
假设您有一列指定顺序,请使用lag()
:
select t.*
from (select t.*,
lag(stat) over (partition by unitcode order by <ordering column>) as prev_stat
from t
) t
where prev_stat <> stat;
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