sql - SQL查询对具有相同客户端的多个条目但具有不同地址代码的地址表进行分组

Question

我有一个包含地址详细信息的表格，如下所示。+表格视图

-ClientID|Address Code|EMAIL

4566666|02|eeeee@gmail.com

4566666|03|77eee@gmail.com

1566656|01|HHHHH@gmail.com

1566656|02|JJJJJ@gmail.com

1566656|03|BBBBB@gmail.com

预期结果：

ClientID|Address code 1|EMAIL 1| Address code 2| Email 2|Address code 3| Email 3|

4566666|02|eeeee@gmail.com|03|77eee@gmail.com

1566656|01|HHHHH@gmail.com|02|JJJJJ@gmail.com|03|BBBBB@gmail.com

Answer 1

with cte as (
    select
        row_number() over(partition by "ClientID" order by "AddressCode") AS row_num,
        "ClientID",
        "AddressCode",
        "EMAIL"
    from Table1
)
select
    "ClientID",
    max(case when row_num = 1 then "AddressCode" end) as AddressCode1,
    max(case when row_num = 1 then "EMAIL" end) as Email1,
    max(case when row_num = 2 then "AddressCode" end) as AddressCode2,
    max(case when row_num = 2 then "EMAIL" end) as Email2,
    max(case when row_num = 3 then "AddressCode" end) as AddressCode3,
    max(case when row_num = 3 then "EMAIL" end) as Email3
from cte
group by "ClientID"

sql fiddle demo