Bigquery - 返回具有結構特定字段的結構數組

Question

我在 bigquery 中有一個結構數組。 我想返回一個結構體數組，但是該數組結構體的字段比原始結構體少。

例子：

我想要相同的結果，但沒有 Skills.Id。

我試圖做這樣的事情，但

  SELECT  [(select struct(dd.Level as Level, dd.TypeId as typeid)
                  from unnest(dd.Skills) as dd  )]  as skills    
   FROM tablee dd

但得到一個例外：

Scalar subquery produced more than one element

Answer 1

嘗試ARRAY而不是[] ：

SELECT ARRAY(select struct(dd.Level as Level, dd.TypeId as typeid) 
             from unnest(tablee.Skills) as dd) as skills    
FROM tablee