Solved

Inserting null values

Posted on 2011-03-24
13
263 Views
Last Modified: 2012-06-27
iM DOING AN INSERT iNTO..SELECT STATEMENT.
Id like to know that if under the select statement the column field is null, Id like to insert NULL in the coulumn- if there is no value.

How is the select statemnt
0
Comment
Question by:zachvaldez
  • 5
  • 4
  • 2
  • +2
13 Comments
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 35207196
if the select returns a NULL, a NULL will be inserted in the new table.
0
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 35207204
you can still select the column by name, if the value is null, indeed a NULL will be inserted.
0
 

Author Comment

by:zachvaldez
ID: 35207259
so by default it places NULL not  empty string or ''
0
Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 35207264
exactly.
0
 

Author Comment

by:zachvaldez
ID: 35207299
If I do in the selct part...

Select Tid,uId, '70' as K_code,tdate from tbal where Tid = 3

Id like to insert Null if '70' is null
0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 35207308
if the select returns a null, the resulting table will have a null

if you want to replace empty values with null, you can do something like this:
insert into ...
select field1, field2, case field3 when '' then null else field3 end
from ...
0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 35207325
>>Id like to insert Null if '70' is null

'70' is a constant and it is never null! it always have the value '70'
0
 

Author Comment

by:zachvaldez
ID: 35207570
Oh, It's not my intention to place a constant value there. I got wrong logic
So Id like to change that logic then
that if  field dtCode is not null insert '70' as K_code  else null.
0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 35207594
insert into ...
select field1, field2, case when dtCode is not null then '70' else null end
from ...
0
 

Expert Comment

by:karthik_a1
ID: 35207686
Use NVL function in the select statement then it will be possible enter 70 when NULL comes in the table
0
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 35207757
isn't NVL an Oracle function? The question here is about MS SQL Server 2005
0
 
LVL 2

Accepted Solution

by:
CoolBurn28 earned 250 total points
ID: 35229797
CREATE TABLE tbl_tmp1(idn int,product varchar(30));
INSERT INTO tbl_tmp1 values(1,'coke');
INSERT INTO tbl_tmp1 values(2,'sprite');
INSERT INTO tbl_tmp1(idn) values(3);
INSERT INTO tbl_tmp1 values(4,'coke');
INSERT INTO tbl_tmp1(idn) values(5);
--
CREATE TABLE tbl_tmp2(idn int,product varchar(30));
--
INSERT INTO TBL_TMP2
SELECT IDN,ISNULL(PRODUCT,'')FROM tbl_tmp1;
--
SELECT * FROM tbl_tmp2;

Open in new window

0
 

Author Closing Comment

by:zachvaldez
ID: 35343364
isnull works!
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction This article will provide a solution for an error that might occur installing a new SQL 2005 64-bit cluster. This article will assume that you are fully prepared to complete the installation and describes the error as it occurred durin…
This article explains how to reset the password of the sa account on a Microsoft SQL Server.  The steps in this article work in SQL 2005, 2008, 2008 R2, 2012, 2014 and 2016.
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…

831 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question