Question

我有一个sql查询，我只想显示特定字段有双重条目的那些记录。

以下是我当前输出的示例：

Test 1        Test2         Test3
1               12            654
2               12            4655
3               15            65987
4               16            3548
5               14            7348
6               14            365
7               17            987
8               L13           6547
9               L13           98687

我想仅提取以下内容（仅限Test2的计数为＆gt;且为数字的那些）：

Test 1        Test2         Test3
1               12            654
2               12            4655
5               14            7348
6               14            365

我目前的查询是：

SELECT        *
FROM            Test
WHERE        (Test4 BETWEEN @startdate AND @enddate) AND (isnumeric(test2) = 1)
Group by Test1
having Count(Distinct(test2)) > 1
ORDER BY Test2, test3

Answer 1

使用子查询进行计数和选择：

Select * From test
where test2 in (
    Select test2 From (
        Select test2, count(*) C from test
        where (Test4 BETWEEN @startdate AND @enddate) AND (isnumeric(test2) = 1)
        group by test2 
        having count(*) > 1 ) f
    )

Answer 2

;WITH CTE AS
(
    SELECT  *,
            N = COUNT(*) OVER(PARTITION BY Test2)
    FROM YourTable
    WHERE ISNUMERIC(Test2) = 1
)
SELECT *
FROM CTE
WHERE N > 1;

如何在特定字段中显示重复值

2 个答案: