在Oracle中从一个表和一个视图插入或创建表

时间:2013-06-06 14:45:31

标签: sql oracle oracle-sqldeveloper

我正在尝试创建新表或插入当前存在的表。我需要的数据包含在两个单独的地方。一个是表,我们称之为T,它包含一列数据,我们称之为HEXID。另一个是包含许多列的视图,其中只有三列与我的问题相关。我们将调用视图V和相关列ID,MID和NAME。正如我所说,我想创建一个新表(或新视图),它应该看起来像这样:

+---------+------+-------+--------+
| T.HEXID | V.ID | V.MID | V.NAME |   
+---------+------+-------+--------+
| DATA    | DATA | DATA  | DATA   |
+---------+------+-------+--------+

这里有大量数据。我们正在谈论1000行中的10行。我一直试图这样做几天,但SQL Developer似乎不想合作。所以,我想知道的是:

  1. 这可能吗?
  2. 如果是这样,怎么样?
  3. 谢谢!

1 个答案:

答案 0 :(得分:0)

CREATE TABLE tab1(id NUMBER, col1 NUMBER);
-- table TAB1 created.
CREATE TABLE tab2(id NUMBER, col1 NUMBER, col2 NUMBER, col3 NUMBER);
-- table TAB2 created.

INSERT  ALL
INTO tab1(id, col1)             VALUES (tab1_id, tab1_col1)
INTO tab2(id, col1, col2, col3) VALUES (tab2_id, tab2_col1, tab2_col2, tab2_col3)
SELECT  1  AS tab1_id
,       11 AS tab1_col1
,       1  AS tab2_id
,       21 AS tab2_col1
,       22 AS tab2_col2
,       23 AS tab2_col3
FROM    DUAL
;
-- 2 rows inserted.

SELECT * FROM tab1;
-- 1    11

SELECT * FROM tab2;
-- 1    21  22  23

CREATE  VIEW tab_vw AS
SELECT  tab1.id   AS tab1_id
,       tab1.col1 AS tab1_col1
,       tab2.id   AS tab2_id
,       tab2.col1 AS tab2_col1
,       tab2.col2 AS tab2_col2
,       tab2.col3 AS tab2_col3
FROM    tab1
JOIN    tab2
ON      tab1.id = tab2.id
;
-- view TAB_VW created.

SELECT * FROM tab_vw;
-- 1    11  1   21  22  23

CREATE OR REPLACE TRIGGER tab_trg
INSTEAD OF INSERT ON tab_vw
FOR EACH ROW
BEGIN
    INSERT INTO tab1(id, col1)             VALUES (:new.tab1_id, :new.tab1_col1);
    INSERT INTO tab2(id, col1, col2, col3) VALUES (:new.tab2_id, :new.tab2_col1, :new.tab2_col2, :new.tab2_col3);
END;
-- TRIGGER TAB_TRG compiled

INSERT  INTO tab_vw
(
        tab1_id
,       tab1_col1
,       tab2_id
,       tab2_col1
,       tab2_col2
,       tab2_col3
)
SELECT  2  AS tab1_id
,       11 AS tab1_col1
,       2  AS tab2_id
,       21 AS tab2_col1
,       22 AS tab2_col2
,       23 AS tab2_col3
FROM    DUAL
;
-- 1 rows inserted.

SELECT  *
FROM    tab_vw;
-- 1    11  1   21  22  23
-- 2    11  2   21  22  23