将相同值插入2列的简便方法 [英] easy way to insert same value into 2 columns

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问题描述

您好,


最简单的方法是将相同的值插入同一张桌子的两列

吗?

我的桌子看起来像这样:


Spalte | Typ |属性

-------- + --------- + ----------------------

id |整数|默认nextval(''public.zeit_id_seq'':: text)

pos_id |整数|默认xxx


为xxx我想要与id相同的值自动插入


问候


塞巴斯蒂安

---------------------------(播出结束)------- --------------------

提示9:如果您的
$ b,计划员将无视您选择索引扫描的愿望$ b加入列的数据类型不匹配

Hello,

whats the most simple way to insert the same value into 2 colums of
the same table?
My table is looking like this:

Spalte | Typ | Attribute
--------+---------+----------------------
id | integer | default nextval (''public.zeit_id_seq''::text)
pos_id | integer | default xxx

for the xxx i want the same value than id be inserted automatically

Regards

Sebastian
---------------------------(end of broadcast)---------------------------
TIP 9: the planner will ignore your desire to choose an index scan if your
joining column''s datatypes do not match

推荐答案

针对您的具体问题,我不知道答案。


对于这个特殊情况你可以使用:


创建表your_table(

id整数默认nextval(''' public.zeit_id_seq'':: text),

pos_id整数默认currval(''public.zeit_id_seq'':: text),

...

);


只要你使用不指定id的插入物就可以正常工作

如果没有指定pos_id(否则currval会给你一个

的错误,因为它不能是c没有下一个被叫的alled。


HTH,

Csaba。


On Thu,2003-10-在11点40分,Sebastian Boeck写道:
For your specific question I don''t know the answer.

For this particular case you could use:

create table your_table (
id integer default nextval (''public.zeit_id_seq''::text),
pos_id integer default currval (''public.zeit_id_seq''::text),
...
);

That would work fine as long as you use inserts which don''t specify id
if pos_id is not specified (otherwise the currval will throw you an
error cause it cannot be called without nextval being called).

HTH,
Csaba.

On Thu, 2003-10-16 at 11:40, Sebastian Boeck wrote:
你好,

最简单的方法是将同一个值插入同一个表的2个列中吗?
我的桌子看起来像这样:

Spalte | Typ |属性
-------- + --------- + ----------------------
id |整数| default nextval(''public.zeit_id_seq'':: text)
pos_id |整数|默认xxx
对于xxx我想要与id相同的值自动插入

问候

塞巴斯蒂安

- --------------------------(广播结束)------------------- --------
提示9:如果您的
加入列的数据类型不匹配,规划人员将忽略您选择索引扫描的愿望
Hello,

whats the most simple way to insert the same value into 2 colums of
the same table?
My table is looking like this:

Spalte | Typ | Attribute
--------+---------+----------------------
id | integer | default nextval (''public.zeit_id_seq''::text)
pos_id | integer | default xxx

for the xxx i want the same value than id be inserted automatically

Regards

Sebastian
---------------------------(end of broadcast)---------------------------
TIP 9: the planner will ignore your desire to choose an index scan if your
joining column''s datatypes do not match




---------------------------(广播结束)----------- ----------------

提示2:您可以使用取消注册命令一次性取消所有列表

(发送& ;取消注册YourEmailAddressHere以 ma*******@postgresql.org


Csaba Nagy写道:
Csaba Nagy wrote:
针对您的具体问题,我不知道答案。

对于这个特殊情况你可以使用:

创建表your_table(
id整数默认nextval(''public.zeit_id_seq'':: text),
p os_id整数默认currval(''public.zeit_id_seq'':: text),
...
);

只要你使用插入的东西就可以正常工作如果没有指定pos_id,则指定id
(否则currval会引发一个
错误,因为如果没有调用nextval就无法调用它。)

HTH,
Csaba。
For your specific question I don''t know the answer.

For this particular case you could use:

create table your_table (
id integer default nextval (''public.zeit_id_seq''::text),
pos_id integer default currval (''public.zeit_id_seq''::text),
...
);

That would work fine as long as you use inserts which don''t specify id
if pos_id is not specified (otherwise the currval will throw you an
error cause it cannot be called without nextval being called).

HTH,
Csaba.




非常感谢,但是可以节省使用吗?


我总是得到相同的价值,即使其他插页正在改变

序列> public.zeit_id_seq<只是在同一时间?


问候


塞巴斯蒂安

---------- -----------------(广播结束)---------------------------

提示7:别忘了增加你的免费空间地图设置



Thanks a lot, but is it save to use?

Do i always get the same value, even if an other insert is changing
the sequence >public.zeit_id_seq< just at the same time?

Regards

Sebastian
---------------------------(end of broadcast)---------------------------
TIP 7: don''t forget to increase your free space map settings


Sebastian Boeck写道:
Sebastian Boeck wrote:

我总是得到相同的值,即使其他插入正在改变
序列> public.zeit_id_seq<只是在同一时间?
Thanks a lot, but is it save to use?

Do i always get the same value, even if an other insert is changing the
sequence >public.zeit_id_seq< just at the same time?




您可以编写一个插入前触发器,在此处检索序列值一次,并为两个字段设置
。这样它将确保两个字段都相同

值。


HTH


Shridhar

---------------------------(播出结束)------------ ---------------

提示7:别忘了增加免费空间地图设置



You can write a before insert trigger where you retrieve sequence value once and
set for two fields. That way it will ensure that both the fields would get same
value.

HTH

Shridhar
---------------------------(end of broadcast)---------------------------
TIP 7: don''t forget to increase your free space map settings


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