小编Sea*_*ean的帖子

如何从 table_A 中选择所有行，然后连接来自其他表的结果，但包含一个 NULL 行以显示那些没有 table_A_id 的其他表的聚合值？

WITH RECURSIVE transactions_with_children AS (
  SELECT
    table_A_id,
    other_stuff,
    1 AS depth
  FROM transactions
  WHERE transactions.parent_transaction_id IS NULL
  UNION ALL
  SELECT
    table_A_id,
    other_stuff,
    depth + 1 AS depth
  FROM transactions children
    INNER JOIN transactions_with_children parents ON children.parent_transaction_id = parents.id
)

SELECT 
  table_A.id,
  view_B.aggregate_col1, view_B.aggregate_col2,
  view_C.aggregate_col1, view_C.aggregate_col2

FROM table_A
  -- Limit table_A to only records with data from transactions_with_children, but I also need to include
  -- a null row for all transactions_with_children that don't have …