将所有行从一个表追加到另一个表

Question

我正在使用PostgreSQL 9.3。假设我有两个sql-queries返回两个具有完全相同列名的表。例如：

(SELECT id, partner_registration_date
FROM partner) as tbl1

和

(SELECT id, partner_registration_date
FROM partner_statistic) as tbl2

我需要返回一个表格tbl，以便tbl_ROW_SET = tbl1_ROW_SET ∪ tbl2_ROW_SET和tbl_COLUMN_SET = tbl1_COLUMN_SET = tbl2_COLUMN_SET

Answer 1

对于第一种情况，您可以尝试： -

SELECT id, partner_registration_date
FROM partner as tbl1
UNION ALL
SELECT id, partner_registration_date
FROM partner_statistic as tbl2;

第二，你可以尝试： -

SELECT DISTINCT id, partner_registration_date
FROM (SELECT id, partner_registration_date 
      FROM partner as tbl1
      UNION ALL
      SELECT id, partner_registration_date
      FROM partner_statistic as tbl2);

希望这可以帮到你。