Question

我需要为表中的每个组ID创建一个用逗号分隔的值列表，并填写所有缺少的值，但是我不太确定如何进行操作。我正在使用Server 2016。

我的桌子：

  id  |  group_id  |  value  
------+------------+---------
   1  |         1  |    15
   2  |         1  |    16
   3  |         1  |    20
   4  |         2  |    12
   5  |         2  |    15
   6  |         3  |     8

预期输出：

 group_id  |         list
-----------+-----------------------
        1  |  '15,16,17,18,19,20'
        2  |  '12,13,14,15'
        3  |  '8'

Answer 1

这是另一种方法。创建一个使用开始和结束数字并生成缺失数字的函数。

create function dbo.get_list(@start int, @end int)
returns varchar(1000)
as begin
    declare @retval varchar(1000);
    set @retval = cast(@start as varchar(1000));
    set @start = @start + 1;

    while @start <= @end
    begin
        set @retval = @retval + ',' + cast(@start as varchar(1000));
        set @start = @start + 1;
    end;

    return @retval
end

完成后，编写以下SQL：

select group_id, dbo.get_list(min(value), max(value))
from test
group by group_id

结果

group_id  list
--------  ------------------
1         15,16,17,18,19,20
2         12,13,14,15
3         8

Answer 2

我认为递归CTE是一种好方法：

from threading import Thread
from queue import Queue

jobs = Queue()  # buffer for sysinfo
output_list = []  # store ips

def get_sys_info(self, host_id, appliance):
    sysinfo = self.hx_request("https://{}:3000//hx/api/v3/hosts/{}/sysinfo"
    jobs.put(sysinfo)  # add sysinfo to jobs queue
    return sysinfo  # comment if you don't need it

def get_ips_from_sysinfo(self):
    """it will run contineously untill finish all jobd"""
    while True:
        # get sysinfo from jobs queue
        sysinfo = jobs.get()  # it will wait here for new entry
        if sysinfo == 'exit':
            print('we are done here')
            break

        sysinfo = sysinfo["data"]
        network_array = sysinfo.get("networkArray", {})
        network_info = network_array.get("networkInfo", [])
        ips = []
        for ni in network_info:
            ip_array = ni.get("ipArray", {})
            ip_info = ip_array.get("ipInfo", [])
            for i in ip_info:
                ips.append(i)
        output_list.append(ips)


if __name__ == "__main__":
    # start our listner thread
    Thread(target=rr.get_ips_from_sysinfo)

    threads = []
    for i in ids:
        t = Thread(target=rr.get_sys_info, args=(i, appliance))
        threads.append(t)
        t.start()

    # wait for threads to finish then terminate get_ips_from_sysinfo() by send 'exit' flag
    for t in threads:
        t.join()

    jobs.put('exit')

Here是db <>小提琴。

如何选择按组ID分隔的多个范围

2 个答案: