Question

我有一个简单的问题。我有一张这样的桌子：

ID  NAME     CODE
--  -------  ----
1   JIM      14
1   JOHN     26
2   NICK     26
3   GEORGE   14
4   PAUL     14
4   STEPHEN  26
5   KELLY    14
6   JACK     26

我想从上面创建3个表。一个仅包含代码为14的ID与代码26不具有相同ID的代码。其中一个仅包含代码为26的ID与代码14不具有相同ID。一个包含代码为14的ID和代码26.更确切地说，我想要这些表：

表1：

ID  NAME    CODE
--  ------  ----
3   GEORGE  14
5   KELLY   14

表2：

ID  NAME  CODE
--  ----  ----
2   NICK  26
6   JACK  26

表3：

ID  NAME     CODE
--  -------  ----
1   JIM      14
1   JOHN     26
4   PAUL     14
4   STEPHEN  26

提前感谢任何帮助人员！

Answer 1

第一张表：

CREATE TABLE table1 AS（select * from table3 as T1，其中T1.code = 14 AND T1.id NOT IN（从表3中选择T2.id为T2，其中T1.id = T2.id AND T2.code = 26））;

第二张表：

CREATE TABLE table2 AS（select * from table3 as T1，其中T1.code = 26 AND T1.id NOT IN（从表3中选择T2.id为T2，其中T1.id = T2.id AND T2.code = 14））;

第3表：

CREATE TABLE table3 AS（从表3中选择T1。*作为T1 INNER JOIN table3为T2 ON T1.id = T2.id AND（（T2.code = 26 AND T1.code = 14）OR （T2.code = 14 AND T1.code = 26）））;

Answer 2

请记住VIEW是一个表格：

1

CREATE VIEW Table1
AS
SELECT * 
  FROM YourTable AS T1
 WHERE T1.Code = 14
       AND NOT EXISTS (
                       SELECT * 
                         FROM YourTable AS T2
                        WHERE T2.Name = T1.Name 
                              AND T1.Code = 26
                      );

2

CREATE VIEW Table2
AS
SELECT * 
  FROM YourTable AS T1
 WHERE T1.Code = 26
       AND NOT EXISTS (
                       SELECT * 
                         FROM YourTable AS T2
                        WHERE T2.Name = T1.Name 
                              AND T1.Code = 14
                      );

3

CREATE VIEW Table3
AS
SELECT * 
  FROM YourTable AS T1
 WHERE T1.Code = 14
       AND EXISTS (
                   SELECT * 
                     FROM YourTable AS T2
                    WHERE T2.Name = T1.Name 
                          AND T1.Code = 26
                  );

注意CREATE VIEW SQL DDL需要ANSI-92 Query Mode，否则只需按照常规方式将上述内容创建为“查询”对象。

如何使用MS Access将一个表分成几个？

2 个答案: