[英]Select Spatial version from duplicated rows SQL
I have SQL Table Like that 我有这样的SQL表
Name WID
---------- ----------
name1 1
name1 2
name1 3
name2 1
name3 1
name4 1
name4 2
How I can get only the version before the last version as this 我如何只能这样获得最后一个版本之前的版本
Name WID
---------- ----------
name1 2
name2 1
name3 1
name4 1
Using SQL Query 使用SQL查询
I reach to the Query to get the result as I need 我到达查询以获取所需的结果
SELECT E.Name, E.WID
FROM
(
SELECT Name, MAX(WID) AS WID FROM MyTAble WHERE WID IN (2,1)
GROUP BY Name
) AS ViewVersionIDs
INNER JOIN MyTable AS E ON ViewVersionIDs.Name = E.Name
AND ViewVersionIDs.WID = E.WID
ORDER BY E.Name
If I need the only second Version I make the WID condition WID IN (2,1)
如果仅需要第二个版本,则将WID条件WID IN (2,1)
If i need the only third Version I make the WID condition WID IN (3,2,1)
如果我只需要第三个版本,则将WID条件WID IN (3,2,1)
And So on ... 等等 ...
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