mysql - 许多表上的 ORDER BY SQL

Question

我有这张 table

Table1
 id  |  name  |
  1  |   a    |
  2  |   c    |

和其他像这样的表

Table2
 id  |  name  |
  1  |   b    |
  2  |   d    |

如何对这两个表进行排序

a b c d

DONE READING THIS但它只会给我这个结果

a c b d

当我尝试这个的时候

SELECT * FROM Table1 AS t1 JOIN Table2 AS t2 ON t2.id = t1.id
ORDER BY t1.name ASC, t2.name ASC;

Answer 1

您可以尝试取两个表的UNION:

SELECT id, name
FROM Table1
UNION ALL
SELECT id, name
FROM Table2
ORDER BY name

如果您想保留有关每条记录的原始来源的信息，您可以为此添加一列:

SELECT id, name, 't1' AS source
FROM Table1
UNION ALL
SELECT id, name, 't2'
FROM Table2
ORDER BY name

更新:

如果 Codeigniter 不支持开箱即用的 UNION，您始终可以将上述查询放入字符串中并在 native 执行:

$sql = "SELECT id, name FROM Table1 UNION ALL SELECT id, name FROM Table2 ORDER BY name";
$this->db->query($sql);