如何在mysql中組合兩列並將其作為一列？

Question

+-----+---------------+---------------+
| id  |    team_A     |    team_B     |
+-----+---------------+---------------+
|  1  |   Barcelona   |  Real Madrid  |
+-----+---------------+---------------+
|  2  |     Milan     |     Inter     |
+-----+---------------+---------------+

select * from table and combine as team_c

結果應該像一列..

team_c as

barcelona
milam
real
inter

team_c中的所有行應該是不同的...因為我需要在自動完成下拉菜單中顯示兩個？

Answer 1

試試這個查詢：

select a.team_a as team_c from table a Union select b.team_b from table b

Answer 2

為什么要將這些數據存儲到額外的表中。 您可以使用選擇查詢

select team_a as team_c from table Union select team_b from table

Answer 3

SELECT team_A, team_B , CONCAT_WS('', team_A, team_B) AS team_C, from table;

您可以使用CONCAT_WS組合它們。 希望它會有用！

Answer 4

SELECT CONCAT( team_A," ",team_B) AS team_c FROM table;

你可以試試這個輸出就好

---

巴塞羅那皇馬

米蘭國際米蘭

Answer 5

我認為這應該可以解決你的問題：

SELECT team_A AS team_C FROM table UNION SELECT team_B FROM table