從一個表複製行到另一個，忽略遠程重複

Question

我有兩個表在不同的數據庫中具有相同的列。這兩個表都有記錄。我想插入table1的table1的記錄，但我想忽略已經在表1中的那些記錄。以及我想將所有被忽略的記錄存儲在一個新表中。 例子：

create table dest 
(id number primary key, 
col1 varchar2(10)); 

create table src 
(id number, 
col1 varchar2(10)); 

insert into src values(1,'ABC'); 
insert into src values(2,'GHB'); 
insert into src values(3,'DUP'); 
insert into src values(3,'DUP'); 

commit; 

merge into dest 
    using 
    (select id,col1 from src) src on(dest.id=src.id) 
when not matched then 
    insert values(src.id,src.col1) 
when matched 
    then update set dest.col1=src.col1; 

錯誤報告 - SQL錯誤：ORA-00001：唯一約束（SCOTT.SYS_C0010807）違反 00001 00000 - 「唯一約束（％s％S）違反」 *原因： UPDATE或INSERT語句試圖插入重複鍵。 對於在DBMS MAC模式下配置的Trusted Oracle，如果重複條目存在於不同級別，則可能會看到此消息爲 。 *操作：刪除唯一限制或不要插入密鑰。

Answer 1

可以使用intersect和minus確定差異

-- Test Data 

-- table1@abc 
with data1(id, 
val) as 
(select 1, 'val1' 
    from dual 
    union all 
    select 2, 'val2' 
    from dual 
    union all 
    select 3, 'val3' 
    from dual), 

-- table2@xyz 
data2(id, 
val) as 
(select 1, 'another val1' 
    from dual 
    union all 
    select 2, 'val2' 
    from dual 
    union all 
    select 4, 'val4' 
    from dual) 

-- Intersection 
select 'Intersection', intersection.* 
    from ((select * from data2) intersect (select * from data1)) intersection 

union all 

-- data2 not in data1 
select 'data2 not in data1', d2.* 
    from ((select * from data2) minus (select * from data1)) d2 

union all 

-- data1 not in data2 
select 'data1 not in datad', d1.* 
    from ((select * from data1) minus (select * from data2)) d1;