[英]How to create stored procedure to get value of previous column Entry in SQL Server 2008?
數據庫表: UserTime
UserTimeId int(pk)
LoginStatus nvarchar
LoginStatus
僅存儲兩條信息: In
和Out
例如:
UserTimeId LoginStatus
--------------------------
1 In
2 Out
3 In
4 Out
我想創建一個存儲過程來檢查上一列的LoginStatus
的值是什么。
在C#代碼中,我要這樣實現:
if (StoredProcedureCheckLoginStatus='In')
{
dothis...
}
else
{
do this....
}
使用CTE。 附樣品:
WITH CTE as (
SELECT
RN = ROW_NUMBER() OVER (ORDER BY EmployeeID),
*
FROM HumanResources.Employee
)
SELECT
[Previous Row].*,
[Current Row].*,
[Next Row].*
FROM CTE [Current Row]
LEFT JOIN CTE [Previous Row] ON
[Previous Row].RN = [Current Row].RN - 1
LEFT JOIN CTE [Next Row] ON
[Next Row].RN = [Current Row].RN + 1
WHERE
[Current Row].EmployeeID = 5
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