Question

我在SQL Server中有两个表。第一个表有一个成员名称列，第二个表有它们的亲属名称。我希望在单列中显示来自两个表的数据，如果成员有任何亲属，那么它必须立即显示在成员名称后的第二行中，如果成员不具有任何亲属，则必须只显示一行。例如，下面有第一个memebrsname表和他们的城市名

Regid        Name             City
----------------------------------------
1    Dr. Dharmesh Patel       New york
2    Dr. Vivek Patel          New york
3    Dr. Udayan Kachchhi      New york
4    Dr. Geeti Maheshwari     New york
5    Dr. SHANKAR DAYAL        Arizona
6    Dr. Tejas Kakkad         New york
7    Dr. TUSHAR PATEL         California
8    Dr. Arpan Shah           New york
9    Dr. AMI PATEL            New york

和Relatives表看起来像这样：

Regid   Name             City
-----------------------------------
6    MEETA KAKKAD        New york
1    Aditya Patel        New york
1    Namisha Patel       New york
3    Dimple Kachchhi     New york
4    Pankaj Maheshwari   New york
8    Agastya Shah        New york
8    Roma Shah           New york

我希望显示这样的结果：

regid        Name             City
---------------------------------------------
 1   Dr. Dharmesh Patel       New york
 1      Aditya Patel          New york
 1     Namisha Patel          New york

 2   Dr. Vivek Patel          New york
 3   Dr. Udayan Kachchhi      New york
 3       Dimple Kachchhi      New york
 4   Dr. Geeti Maheshwari     New york
 4      Pankaj Maheshwari     New york  
 5   Dr. SHANKAR DAYAL        Arizona
 6   Dr. Tejas Kakkad         New york
 6       MEETA KAKKAD         New york
 7   Dr. TUSHAR PATEL         California
 8   Dr. Arpan Shah           New york
 8       Agastya Shah         New york
 8       Roma Shah            New york

 9  Dr. AMI PATEL             New york

如何在SQL Server中获得以上结果？请帮忙

Answer 1

使用row_number()函数与union all一起获取父记录下的子记录

select *,
         row_number() over (partition by Regid order by Sort) Seq
from
(
    select Regid, Name, City, 1 AS Sort from parent p 
    UNION ALL
    select Regid, Name, City, 2 AS Sort from child c 
)t

您还可以定义显式排序

select Regid, Name, City, 1 AS Sort from parent p 
UNION ALL
select Regid, Name, City, 2 AS Sort from child c
order by  RegId, Sort

Answer 2

    dependencies {
            implementation fileTree(dir: 'libs', include: ['*.jar'])
            implementation 'com.android.support:appcompat-v7:27.1.0'
            implementation 'com.android.support.constraint:constraint-layout:1.0.2'
            testImplementation 'junit:junit:4.12'
            androidTestImplementation 'com.android.support.test:runner:1.0.1'
            androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'

    }

Answer 3

您似乎正在为regid

订购的两个表寻找联合

select Regid, Name, City 
from table1 
union 
select Regid, Name, City 
from table2
order by regid

Answer 4

假设你要缩进亲属的名字。使用seq确保该成员出现在他/她的亲属面前：

select Regid, Name, City
from
(
select 1 as seq, Regid, Name, City 
from table1 
union all
select 2, Regid,'    ' + Name, City 
from table2 ) t
order by seq, Regid

如何在SQL Server的单列中显示父表数据和子表数据？

4 个答案: