不能從另一個視圖中查詢一個視圖？

好的，我正在將數據庫從 SQL Server（我已經錯過）移動到 MySql 5.6。我在創建有效日期列表時遇到問題。在 SQL Server 中，我只是使用 CTE 來建構數字，然後是月份、年份、月份中的幾天，然後將所有內容交叉連接在一起以創建一個有效的列表。我寧願這樣做，然後創建一個巨大的表格，列出從開始到結束的所有有效日期。但是，將其轉換為一組視圖似乎不起作用：

create view `Numbers` as
   select 0 N union all select 1 union all select 2 union all
   select 3 union all select 4 union all select 5 union all
   select 6 union all select 7 union all select 8 union all select 9;
create view `Months` as
   select n.N+1 MonthNum union all select 11 union all select 12
   from `Numbers` n;

來自 MySql 的錯誤：錯誤程式碼：1109。欄位列表中的未知表“n”。

您必須按如下方式重寫第二個視圖：

create view `Months` as
   select N+1 MonthNum from `Numbers`
   union all select 11
   union all select 12
;

這裡有證據

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mysql> use test
Database changed
mysql> create view `Numbers` as
   ->     select 0 N union all select 1 union all select 2 union all
   ->     select 3 union all select 4 union all select 5 union all
   ->     select 6 union all select 7 union all select 8 union all select 9;
Query OK, 0 rows affected (0.05 sec)

mysql> create view `Months` as
   ->     select N+1 MonthNum from `Numbers`
   ->     union all select 11
   ->     union all select 12
   -> ;
Query OK, 0 rows affected (0.03 sec)

mysql>

看看查詢的輸出

mysql> select * from Months;
+----------+
| MonthNum |
+----------+
|        1 |
|        2 |
|        3 |
|        4 |
|        5 |
|        6 |
|        7 |
|        8 |
|        9 |
|       10 |
|       11 |
|       12 |
+----------+
12 rows in set (0.00 sec)

mysql>

試一試 ！！！

引用自：https://dba.stackexchange.com/questions/36714