Question

我们假设

Table TARGET {
    ID IDENTITY ...,
    ...
    JOB_NO NUMBER
}

我的问题是，如何生成JOB_NO（通过序列），以便在语句中提交的所有插入具有相同的job_no。

输出应该类似于插入stmt的第n次执行。

ID  ... JOB_NO
1   ... 123
2   ... 123
3   ... 123

以下显然不起作用。但是正确的Oracle语法是什么？

INSERT INTO TARGET SELECT A.*, B.* FROM my_source_table A, (SELECT x.nextval from dual) B

非常感谢尔根

Answer 1

您可以为每个此类插入选择NEXTVAL，这会增加sequence，然后在CURRVAL中使用INSERT。

让我们说这是你的序列

create sequence seq START WITH 123 ;

始终在INSERT中指定列名以避免混淆，请勿使用select * from

select seq.NEXTVAL FROM DUAL;
INSERT INTO TARGET(JOB_NO,col1,col2,..) 
SELECT seq.CURRVAL, a.col1,a.col2 FROM my_source_table A, ..

Answer 2

您应该可以执行以下操作：

insert into target select my_seq.nextval, a.* from source a;

根据以下评论进行更新：

SQL*Plus: Release 12.1.0.2.0 Production on Wed Apr 11 12:48:21 2018

Copyright (c) 1982, 2014, Oracle.  All rights reserved.


Connected to:
Oracle Database 12c Standard Edition Release 12.1.0.2.0 - 64bit Production
With the Automatic Storage Management option

SQL> create table a(id number, name varchar2(10));

Table created.

SQL> insert into a values(1,'Larry');

1 row created.

SQL> c/1/2
  1* insert into a values(2,'Larry')
SQL> c/Larry/Moe
  1* insert into a values(2,'Moe')
SQL> /

1 row created.

SQL> c/2/3
  1* insert into a values(3,'Moe')
SQL> c/Moe/Curly
  1* insert into a values(3,'Curly')
SQL> /

1 row created.

SQL> commit;

Commit complete.

SQL> select * from a;

        ID NAME
---------- ----------
         1 Larry
         2 Moe
         3 Curly


SQL> create table b as select 1 id, a.id id_a, a.name from a where 1=0;

Table created.

SQL> desc b
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 ID                                                 NUMBER
 ID_A                                               NUMBER
 NAME                                               VARCHAR2(10)

SQL> create sequence seq_a;

Sequence created.

SQL> insert into b select seq_a.nextval, a.* from a;

3 rows created.

SQL> select * from b;

        ID       ID_A NAME
---------- ---------- ----------
         1          1 Larry
         2          2 Moe
         3          3 Curly

希望有所帮助。

Oracle从序列加入nextval

2 个答案: