我创建了一个包含列名tbl_Dist
和District
的表DistCode
,区表中有许多重复值,因此我使用以下语句删除了所有重复值:< / p>
select distinct District from tbl_Dist;
已完成,但我没有得到如何将上述执行查询的结果更新到表tbl_Dist
?
答案 0 :(得分:1)
您需要print_r($vpcURL);
而不是Delete
Update
要检查将要删除的记录,请使用此功能。
;with cte as
(
Select row_number() over(partition by District order by (select null)) as rn,*
From yourtable
)
Delete from cte where Rn > 1
答案 1 :(得分:1)
您可以如下所示:
-- Move temp table
SELECT DISTINCT District INTO TmpTable FROM tbl_Dist
-- Delete all data
DELETE FROM tbl_Dist
-- Insert data from temp table
INSERT INTO tbl_Dist
SELECT * FROM TmpTable
<强>更新强>
首先,运行此查询。您将拥有一个临时表,其中包含主表(tbl_Dist)
的不同数据-- Move temp table
SELECT DISTINCT District INTO TmpTable FROM tbl_Dist
然后运行以下查询以删除所有数据
DELETE FROM tbl_Dist
最后,运行以下查询将所有不同的数据插入主表。
-- Insert data from temp table
INSERT INTO tbl_Dist
SELECT * FROM TmpTable
答案 2 :(得分:0)
如果您想保留此查询,可以将其保留在视图中,通过该视图编写更新查询。该表将更新
答案 3 :(得分:0)
试试这个脚本
DELETE FROM tbl_Dist
WHERE District = District
AND DistCode > DistCode