mysql将来自多个表的多列合并为一列

Question

因此，假设我有两个表（表1和表2），每个表都有两列（id，number），如下所示

table 1

+-----+------------+
|  id |   number   |
+-----+------------+
|  1  |   value1   |
+-----+------------+

table 2
+-----+------------+
|  id |   number   |
+-----+------------+
|  2  |   value2   |
+-----+------------+

我要寻找的是在两列中选择所有ID和数字以创建新视图

+-----+------------+
|  id |   number   |
+-----+------------+
|  1  |   value1   |
+-----+------------+
|  2  |   value2   |
+-----+------------+

Answer 1

SELECT id, number FROM table1 
UNION ALL
SELECT id, number FROM table2

Answer 2

您可以按照以下方式使用union all或union作为唯一值-

select id,number from tabl1 
union all 
select id,number from tabl2;