從Postgres的

Question

獲取數據

我使用Postgres的，我有這個表：

id | fieldname | value 
---------------------- 
1 | price  | 10000 

和

id | dyn_field | dyn_value 
-------------------------- 
1 | bathroom | 2 
2 | bedroom | 4 

，我想獲得以下輸出

field  | value 
--------------------- 
price  | 10000 
bathroom | 2 
bedroom | 4 

什麼查詢可用於獲取這些輸出，？ 謝謝。

Answer 1

SELECT fieldname, value FROM this_table 
UNION ALL 
SELECT dyn_field, dyn_value FROM and_table 

（你沒有指定表名，所以我做了它們）。

Answer 2

SELECT fieldname AS field, value AS value 
FROM tableOne 
UNION ALL 
SELECT dyn_field AS field, dyn_value AS value 
FROM tableTwo 

Answer 3

試試這個：

SELECT fieldname as field, value 
FROM table1 
UNION select dyn_field as field, dyn_value as value 
FROM table2