将一个表的所有行追加到另一个表

Question

我正在使用PostgreSQL 9.3。 假设我有两个sql查询，它们返回两个表的列名完全相同。 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tbl这样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;

其次，您可以尝试：

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);

希望这对您有帮助。