Howdy all,
is it possible to force a field to be NOT NULL but not
have any default value (I.E the insert statement must
explicitly provide data for the field in question)?
Cheers,
Tripp
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Hello All,
I've created a table(using MySQL 3.23.33), using default values:
DROP TABLE IF EXISTS referral;
CREATE TABLE referral (
refer_id int(10) UNSIGNED DEFAULT '100' NOT NULL,
refer_fname varchar(20) DEFAULT '' NOT NULL,
refer_lname varchar(20) DEFAULT
When I do a describe statement, I see some default values assigned
automatically to columns in the table. What statement will assign a column
to blank, so that there is no default value assigned?
-
Before posting, please check
On Tuesday 08 February 2005 03:32 pm, Emmett Bishop wrote:
> is it possible to force a field to be NOT NULL but not
> have any default value (I.E the insert statement must
> explicitly provide data for the field in question)?
of course: col1 int not null
Jeff
pgpKRoQG6Ktfo.pgp
Description: PGP
Jeff Smelser wrote:
On Tuesday 08 February 2005 03:32 pm, Emmett Bishop wrote:
is it possible to force a field to be NOT NULL but not
have any default value (I.E the insert statement must
explicitly provide data for the field in question)?
of course: col1 int not null
Jeff
Except that ALL columns
Hi,
I'm having problems with setting default values for an enum. It's for
a booking system, and I'm keeping track of which day a property starts
a booking period. It's useful to have the enum in day order therefore.
Omitting the prompts, here's what's happenin
On Mon, Mar 05, 2001 at 10:26:58PM -0600, MikeBlezien wrote:
> Hello All,
>
> I've created a table(using MySQL 3.23.33), using default values:
>
> DROP TABLE IF EXISTS referral;
> CREATE TABLE referral (
> refer_id int(10) UNSIGNED DEFAULT '100' NOT NULL,
; Hello All,
>>>
>>> I've created a table(using MySQL 3.23.33), using default values:
>>>
>>> DROP TABLE IF EXISTS referral;
>>> CREATE TABLE referral (
>>> refer_id int(10) UNSIGNED DEFAULT '100' NOT NULL,
>>> ref
>
> I've created a table(using MySQL 3.23.33), using default values:
>
> DROP TABLE IF EXISTS referral;
> CREATE TABLE referral (
> refer_id int(10) UNSIGNED DEFAULT '100' NOT NULL,
> refer_fname varchar(20) DEFAULT '' NOT NULL,
> refer_lname varc
On Tue, 6 Mar 2001 11:14:36 +0100, Fred van Engen <[EMAIL PROTECTED]>
wrote:
Thanks Fred,
>>INSERT INTO referral
>> VALUES (NULL, 'xxx.yyy', 'xxx.yyy', '[EMAIL PROTECTED]');
>>
>>
>>But an INSERT like this:
This is where I was making the mistake! It works fine now. I was inserting an
blank empt
On Tue, 6 Mar 2001, MikeBlezien wrote:
> >>Try giving a number instead of a string as a default for an int.
>
> Not sure I follow, it is a number??
>
> >>> refer_id int(10) UNSIGNED DEFAULT '100' NOT NULL,
Your '100' is a string. Try something like this:
refer_id int(10) UNSIGNED NOT NULL DEFAU
I am useing mysql Ver 11.18 Distrib 3.23.52, for pc-linux-gnu (i686). I have
set up a table in which one of the fields have a default value (i.e. "New
York"). When I INSERT a record, that field is empty so that the default value
is inserted into the field automatically (at least that's what I
Mark writes:
> When I do a describe statement, I see some default values assigned
> automatically to columns in the table. What statement will assign a column
> to blank, so that there is no default value assigned?
Short answer: you can't. There was a long thread about this a w
I have a query which scans a subscription databse to locte the most recent
expiration date of the subscription to a given periodical or service to compute
the start date of a renewal.
It works fine when for a given person such a subscription exists. If none
exists, as expected the query produces n
Hi All,
I am trying to use a function as a default value for a column but do not
seem to get the desired result. I want to use the NOW() function for a
last_updated column, here is my code...
CREATE TABLE test_table (
last_updated datetime NOT NULL default `NOW()`
) TYPE=MyISAM;
This gives an
[snip]
insert into property values ('','Book-keeper\'s Cottage','Thu');
insert into property values ('','Inglenook Barn','Fri');
insert into property values ('','Maggie\'s House','Fri');
insert into property values ('','Riverside View','');
insert into property values ('','The Manse','');
insert in
Jay!
Thanks for help with a 'proper' insert. ;-)
Yes, the full statement works fine. (I assume this is something like
the not setting default values from importing DATA files?) All a bit of
a shame, as I'm executing the insert from a PHP script, and was trying
to make the rou
Hi,
> [snip]
> insert into property values ('','Book-keeper\'s Cottage','Thu');
> insert into property values ('','Inglenook Barn','Fri');
> insert into property values ('','Maggie\'s House','Fri');
> insert into property values ('','Riverside View','');
> insert into property values ('','The Mans
[snip]
Yes, the DEFAULT doesn't apply. However, shouldn't MySQL
raise an exception because '' isn't a valid value for this ENUM
specification?
[/snip]
>From http://www.mysql.com/doc/en/ENUM.html
The value may also be the empty string ("") or NULL under certain
circumstances:
If you insert an in
> [snip]
> Yes, the DEFAULT doesn't apply. However, shouldn't MySQL
> raise an exception because '' isn't a valid value for this ENUM
> specification?
> [/snip]
>
> >From http://www.mysql.com/doc/en/ENUM.html
>
> The value may also be the empty string ("") or NULL under certain
> circumstances:
[snip]
> If you insert an invalid value into an ENUM (that is, a string not
> present in the list of allowed values), the empty string is inserted
> instead as a special error value. This string can be distinguished
from
> a 'normal' empty string by the fact that this string has the numerical
> val
Hi,
> [snip]
> > If you insert an invalid value into an ENUM (that is, a string not
> > present in the list of allowed values), the empty string is inserted
> > instead as a special error value. This string can be distinguished
> from
> > a 'normal' empty string by the fact that this string has th
int_NOT_NULL.html>:
To be able to support easy handling of non-transactional tables all
fields in MySQL have default values.
If you insert a 'wrong' value in a column like a NULL in a NOT NULL
column or a too big numerical value in a numerical column, MySQL will
instead of giving an erro
ifferent on InnoDB?
> > To be able to support easy handling of non-transactional tables all
> > fields in MySQL have default values.
> >
> > If you insert a 'wrong' value in a column like a NULL in a NOT NULL
> > column or a too big numerical value in a numerical
On 9 Oct 2002, at 13:14, Lawrence S. Stephens III wrote:
> When I INSERT a record, that field is empty so that the default value
> is inserted into the field automatically (at least that's what I think).
If your query is setting the column to the empty string, then you're
setting it to the emp
Timestamp is a useful datatype when you want to register when a record
changed. Now I want to register who changed it and tried to use user() as a
default value and my database just returned user() as the field value. Is
there someone who can tell me how to use a function result as default
val
Jacques Brignon <[EMAIL PROTECTED]> wrote on 11/09/2005 09:58:07 AM:
> I have a query which scans a subscription databse to locte the most
recent
> expiration date of the subscription to a given periodical or serviceto
compute
> the start date of a renewal.
>
> It works fine when for a given pe
Thanks, that makes a lot of sense.
My only problem is that I am using here a standard piece of code on the
application side and I would hate to modify it, the thing I have all liberty to
change is the query! Reason for trying to ask the query itself to tell me if
there is nothing in the DB!
--
Ja
In article <[EMAIL PROTECTED]>,
Jacques Brignon <[EMAIL PROTECTED]> writes:
> Thanks, that makes a lot of sense.
> My only problem is that I am using here a standard piece of code on the
> application side and I would hate to modify it, the thing I have all liberty
> to
> change is the query! Rea
ginal Message-
From: Jacques Brignon [mailto:[EMAIL PROTECTED]
Sent: Wednesday, November 09, 2005 9:19 AM
To: [EMAIL PROTECTED]
Cc: mysql@lists.mysql.com
Subject: Re: Query producing default values
Thanks, that makes a lot of sense.
My only problem is that I am using here a standard piece o
[EMAIL PROTECTED] wrote:
Jacques Brignon <[EMAIL PROTECTED]> wrote on 11/09/2005 09:58:07 AM:
I have a query which scans a subscription database to locate the most recent
expiration date of the subscription to a given periodical or service to compute
the start date of a renewal.
It works fine wh
Thanks to all those who provided feed back.
As a result I found two ways of solving my problem, one is going along the LEFT
JOIN track, and the other one is to run a script before doing the query itself
whioch is doable in my environment without modifying the core software and
which can then do ea
No functions as default values is a bummer, but timestamp will do he trick,
so thanks for your help; much appreciated.
Phil.
-Original Message-
From: Cybot [mailto:[EMAIL PROTECTED]
Sent: 06 August 2003 15:37
To: [EMAIL PROTECTED]
Subject: Re: Functions as default values
> I am try
I am trying to use a function as a default value for a column but do not
seem to get the desired result. I want to use the NOW() function for a
last_updated column, here is my code...
CREATE TABLE test_table (
last_updated datetime NOT NULL default `NOW()`
) TYPE=MyISAM;
This gives an error;
CRE
Hi all, i've been having an issue with binding params. If i have created an
INSERT query with a param binding to a particular column, call it column
"A", is there any way that i can use that (prepared) query to get the db
defined default value into column A?
Im at a loss!
thanks much,
sean pe
I see that in the prepared statements C API, I can specify to the bind
parameter that the value is supposed to be null using MYSQL_BIND.is_null. Is
there any support for the MYSQL_BIND object to use a column's default value?
- Yossie
--
MySQL General Mailing List
For list archives: http://lists
Hi,
> I will now have to supply a field list to the function in
> addition. Ah well ;-)
Maybe this help:
insert into `property` values ('', 'Riverside View', default);
Take care,
Aleksandar
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MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe:
Hi,
There seems to be a problem with setting default values for the timestamp
column type in version 4.0.17:
mysql> create table test (t timestamp default '2001-01-01 00:00:00' not null);
ERROR 1067: Invalid default value for 't'
In 4.0.16 this works normally:
mysq
You can't.
Default values must be constants.
Håkan Elmqvist wrote:
> Timestamp is a useful datatype when you want to register when a record
> changed. Now I want to register who changed it and tried to use user()
> as a default value and my database just returned user() as the
From: Gerald Clark <[EMAIL PROTECTED]>
> Default values must be constants.
> Håkan Elmqvist wrote:
> > Now I want to register who changed it...
===> MY two cents worth:
With MySQL, this sort of thing usually gets handled in a piece of software. In Perl,
we might say some
-->-Original Message-
-->From: sean peters [mailto:[EMAIL PROTECTED]
-->Sent: Monday, October 27, 2003 10:17 AM
-->To: [EMAIL PROTECTED]
-->Subject: bind params and default values
-->
-->Hi all, i've been having an issue with binding params. If i have
created
-
bject: Re: bind params and default values
-->INSERT INTO my_table (A, B) VALUES ( COALESCE(?, A), COALESCE(?, B) )
-->
-->I think this should work, but am now wondering how much time this
will
-->actually save me. I say this because in this situation, even though
the
-->query
-->i
Dear List,
Could sombody explain this behaviour of mySQL 4 to me:
Assigning a column as "not null" will AUTOMATICALLY assign (=force upon) it
a default value of an empty string ('') if a string or zero (0) if a
numerical datatype. Thereby effectively bypassing all and every error
message during
o small print ;-)
""Any column not explicitly given a value is set to its default value.
For example, if you specify a column list that doesn't name all the
columns in the table, unnamed columns are set to their default values.
Default value assignment is described in sectio
sql
>
> Hello
>
> I need a ENUM to default to a value when it gets a NULL.
>
> Can this be done. Right now is I set the column to
> FIELD ENUM('NO','YES') NOT NULL
>
> It fails to insert when a NULL is entered.
>
> I want it to default to NO
>
>
> Can I set it to do this?
>
> Ruben
>
ENUM can handle your needs. you should be able to just change your syntax
to: FIELD ENUM('NO','YES') NULL
under that syntax your default value will be NULL.
this is from the documentation directly: "If an ENUM is declared NULL, NULL
is also a legal value for the column, and the default value
> ENUM can handle your needs. you should be able to just change your syntax
> to: FIELD ENUM('NO','YES') NULL
>
> under that syntax your default value will be NULL.
We need it to default to 'NO' not NULL
sql
Ruben
-
Before p
sql
> > ENUM can handle your needs. you should be able to just change your syntax
> > to: FIELD ENUM('NO','YES') NULL
> >
> > under that syntax your default value will be NULL.
> >
> I need it to default to 'NO' not NULL
-
Ruben,
If you leave it as NOT NULL it should default to NO. "If an ENUM is
declared NOT NULL, the default value is the first element of the list of
allowed values."
SIDE QUESTION:
Are you doing something like: select * from table where enum_colum="NO"
If you are running that type of query it
When I send a NULL it's rejected as bad data, which sort of makes sense
On 2002.04.12 12:33 Steve Katen wrote:
> Ruben,
>
> If you leave it as NOT NULL it should default to NO. "If an ENUM is
> declared NOT NULL, the default value is the first element of the list of
> allowed values."
>
Th
Steve Katen wrote:
> Ruben,
>
> If you leave it as NOT NULL it should default to NO. "If an ENUM is
> declared NOT NULL, the default value is the first element of the list
> of allowed values."
>
> SIDE QUESTION:
> Are you doing something like: select * from table where enum_colum="NO"
>
> I
Ruben,
"If you insert an invalid value into an ENUM (that is, a string not present
in the list of allowed values), the empty string is inserted instead as a
special error value."
it is inserting the value as the first value in the table which is the
error value or the index of 0.
i would ass
Instead of inserting NULL, leave the column out.
INSERT mytable (2nd_col_name) VALUES (NULL);
If you don't mention the enum column, it gets the default.
Michael
On Fri, 12 Apr 2002, Ruben I Safir wrote:
> When I send a NULL it's rejected as bad data, which sort of makes sense
>
>
> On 2002.0
On Fri, 12 Apr 2002, Steve Katen wrote:
> Ruben,
>
> If you leave it as NOT NULL it should default to NO. "If an ENUM is
> declared NOT NULL, the default value is the first element of the list of
> allowed values."
>
> SIDE QUESTION:
> Are you doing something like: select * from table where enu
Your example is not the same, it sends only one value
to a 2 value table. It definetely does not work if you send NULL
INSERT VALUES(NULL)
Ruben
On 2002.04.12 14:10 Michael Stassen wrote:
>
> On Fri, 12 Apr 2002, Steve Katen wrote:
>
> > Ruben,
> >
> > If you leave it as NOT NULL it should
Ruben,
I think youare referring to my earlier message, but no matter.
You cannot insert NULL into a column you've defined as NOT NULL, with some
special exceptions (auto_increment and timestamp, for example).
As I said before, if you want a column to get its default value, you leave
it out of t
Jan,
This question comes up a lot. You should take a look at
<http://www.mysql.com/doc/en/constraint_NOT_NULL.html>. The first line
is, "To be able to support easy handling of non-transactional tables,
all fields in MySQL have default values." Mysql automatically conv
o:[EMAIL PROTECTED]
> Sent: Saturday, November 01, 2003 05:13
> To: Jan Magnusson
> Cc: Mysql General mailing list
> Subject: Re: "not null" and default values confusion
>
>
> Jan,
>
> This question comes up a lot. You should take a look at
> <http://www.m
Hi,
> This question comes up a lot. You should take a look at
> <http://www.mysql.com/doc/en/constraint_NOT_NULL.html>. The first line
> is, "To be able to support easy handling of non-transactional tables,
> all fields in MySQL have default values." Mysql automat
Hello All,
Question. In mysql 5.5 what are the defaults for these values:
max_connections = ? (is this set to 151 in 5,5)
max_user_connections = ?(is this set to unlimited unless you provide
the exact number)?
Thank you so much.
Wayne Leutwyler, RHCT
Open Source + Open M
:wleut...@columbus.rr.com]
> Sent: Friday, September 21, 2012 7:04 AM
> To: mysql@lists.mysql.com
> Subject: Default Values for Max User and Max Connections.
>
> Hello All,
>
> Question. In mysql 5.5 what are the defaults for these values:
>
> max_connections = ? (is
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