SQL Hierarchy data Pivot-Unpivot - ошибка конфликта типа столбца

Question

Я пытаюсь получить данные иерархии в строках в столбцы. Я получаю следующую ошибку: «Тип столбца« lvlCode »конфликтует с типом других столбцов, указанных в списке UNPIVOT».

Мой запрос выглядит следующим образом

;with hd (orgid, lvlCode,description, parentorgid, category) 
as 
(
    select orgid, lvlCode,description, parentorgid, 1 as category 
    from orgunit 
    where parentorgid is null 
    union all 
    select t1.orgid, t1.lvlCode,t1.description, t1.parentorgid, hd.category +1 
    from orgunit t1 
    inner join hd 
    on t1.parentorgid = hd.orgid 
), 
unpiv as 
(
    select value, 'cat_'+cast(category as varchar(5))+'_'+ col col_name 
    from 
    (
    select cast(orgid as varchar(17)) orgid, lvlCode,description, parentorgid, category 
    from hd 
) src 
    unpivot 
    (
    value for col in (orgid, lvlCode,description) 
) un 
) 
select [cat_1_orgid], [cat_1_lvlCode],[cat_1_description], 
        [cat_2_orgid], [cat_2_lvlCode],[cat_2_description], 
        [cat_3_orgid], [cat_3_lvlCode],[cat_3_description], 
        [cat_4_orgid], [cat_4_lvlCode],[cat_4_description], 
        [cat_5_orgid], [cat_5_lvlCode],[cat_5_description], 
        [cat_6_orgid], [cat_6_lvlCode],[cat_6_description], 
        [cat_7_orgid], [cat_7_lvlCode],[cat_7_description] 
from unpiv 
pivot 
(
    max(value) 
    for col_name in ([cat_1_orgid], [cat_1_lvlCode],[cat_1_description], 
        [cat_2_orgid], [cat_2_lvlCode],[cat_2_description], 
        [cat_3_orgid], [cat_3_lvlCode],[cat_3_description], 
        [cat_4_orgid], [cat_4_lvlCode],[cat_4_description], 
        [cat_5_orgid], [cat_5_lvlCode],[cat_5_description], 
        [cat_6_orgid], [cat_6_lvlCode],[cat_6_description], 
        [cat_7_orgid], [cat_7_lvlCode],[cat_7_description]) 
) piv 

Answer 1

попытаться преобразовать lvlCode в тип данных VARCHAR

... 
    (
    select CAST(orgid as varchar(17)) orgid, 
      CAST(lvlCode as varchar(17)) lvlCode, 
      description, parentorgid, category 
    from hd 
    ) 
...