Why does a select from table with an integer field return a row if I compare
the integer to an alpha character?
Here's the info ( a straight copy and paste), then compare my two select
statements:
mysql> desc product;
+------------------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------------+--------------+------+-----+---------+-------+
| prd_id | int(11) | | PRI | 0 | |
| prd_name | varchar(30) | | | | |
| prd_short_desc | varchar(250) | YES | | NULL | |
| prd_long_desc1 | text | YES | | NULL | |
| prd_long_desc2 | text | YES | | NULL | |
| prd_long_desc3 | text | YES | | NULL | |
| prd_thumb | varchar(250) | YES | | NULL | |
| prd_full_image | varchar(250) | YES | | NULL | |
| prd_price | decimal(8,2) | YES | | NULL | |
| prd_custom1 | varchar(10) | YES | | NULL | |
| prd_custom2 | varchar(10) | YES | | NULL | |
| prd_start_date | date | YES | | NULL | |
| prd_end_date | date | YES | | NULL | |
| prd_instock | int(11) | | | 0 | |
| prd_search_words | text | YES | | NULL | |
+------------------+--------------+------+-----+---------+-------+
15 rows in set (0.00 sec)
mysql> select prd_id from product where prd_id = 33;
+--------+
| prd_id |
+--------+
| 33 |
+--------+
1 row in set (0.01 sec)
mysql> select prd_id from product where prd_id = '33a';
+--------+
| prd_id |
+--------+
| 33 |
+--------+
1 row in set (0.00 sec)
mysql> select version();
+-----------+
| version() |
+-----------+
| 3.23.32 |
+-----------+
1 row in set (0.00 sec)
mysql>
notice that
select prd_id from product where prd_id = 33;
and
select prd_id from product where prd_id = '33a';
both reutrun a row, the same row actually!
I noticed that this returns nothing:
select prd_id from product where prd_id = 'a33';
So 'What Gives?'
I can't seem to track down any info about this so any insight would be
great.
(please notice that my version is 3.23.32)
Thanks in advandce
JohnL 8 3897
"John" <dsklfjhsdk> wrote in message
news:vt************@corp.supernews.com... Why does a select from table with an integer field return a row if I
compare the integer to an alpha character?
notice that select prd_id from product where prd_id = 33; and select prd_id from product where prd_id = '33a'; both reutrun a row, the same row actually!
I noticed that this returns nothing: select prd_id from product where prd_id = 'a33';
So 'What Gives?'
I can't seem to track down any info about this so any insight would be great. (please notice that my version is 3.23.32)
Thanks in advandce JohnL
I would imagine it's a bug/feature of mysql that will truncate a number at
a character on input, in which case:
1) '33' = 33
2) '33a' = 33
3) 'a33' = nothing
try selecting something like this: select prd_id from product where prd_id =
'33a4';
and see what that gives you. Should just return 33 by my estimation.
"John" <dsklfjhsdk> wrote in message
news:vt************@corp.supernews.com... Why does a select from table with an integer field return a row if I
compare the integer to an alpha character?
notice that select prd_id from product where prd_id = 33; and select prd_id from product where prd_id = '33a'; both reutrun a row, the same row actually!
I noticed that this returns nothing: select prd_id from product where prd_id = 'a33';
So 'What Gives?'
I can't seem to track down any info about this so any insight would be great. (please notice that my version is 3.23.32)
Thanks in advandce JohnL
I would imagine it's a bug/feature of mysql that will truncate a number at
a character on input, in which case:
1) '33' = 33
2) '33a' = 33
3) 'a33' = nothing
try selecting something like this: select prd_id from product where prd_id =
'33a4';
and see what that gives you. Should just return 33 by my estimation.
"SwissCheese" <Sw*********@cfl.rr.com> wrote in message
news:ZM*********************@twister.tampabay.rr.c om... "John" <dsklfjhsdk> wrote in message news:vt************@corp.supernews.com... Why does a select from table with an integer field return a row if I compare the integer to an alpha character?
notice that select prd_id from product where prd_id = 33; and select prd_id from product where prd_id = '33a'; both reutrun a row, the same row actually!
I noticed that this returns nothing: select prd_id from product where prd_id = 'a33';
So 'What Gives?'
I can't seem to track down any info about this so any insight would be great. (please notice that my version is 3.23.32)
Thanks in advandce JohnL
I would imagine it's a bug/feature of mysql that will truncate a number
at a character on input, in which case:
1) '33' = 33 2) '33a' = 33 3) 'a33' = nothing
try selecting something like this: select prd_id from product where prd_id
= '33a4';
and see what that gives you. Should just return 33 by my estimation.
That's partially correct. It's actually a feature of SQL in general. If SQL
is expecting a number and gets a letter, it drops everything after the
letter. Therefore:
33a = 33
a33 = nothing
3a3 = 3
Thanks for the replies.
sure enough in mysql '3a3' = 3
but in oracle it always fails on a 'non-number' character. (Oracle 8i)
Here's the output
SQL> select id from id_table where id = '6a7';
select plc_id from coop_placement where plc_id = '6a7'
*
ERROR at line 1:
ORA-01722: invalid number
I think I prefer getting an error in queries like this. Most of the time I
like it that mysql will take nearly any query and give it a shot, but in my
apps I'd rather it crapped out.
Thanks
JohnL
"Ryan Stewart" wrote in message news:fb********************@texas.net... "SwissCheese" wrote in message news:ZM*********************@twister.tampabay.rr.c om... "John" <dsklfjhsdk> wrote in message news:vt************@corp.supernews.com... Why does a select from table with an integer field return a row if I compare the integer to an alpha character?
notice that select prd_id from product where prd_id = 33; and select prd_id from product where prd_id = '33a'; both reutrun a row, the same row actually!
I noticed that this returns nothing: select prd_id from product where prd_id = 'a33';
So 'What Gives?'
I can't seem to track down any info about this so any insight would be great. (please notice that my version is 3.23.32)
Thanks in advandce JohnL
I would imagine it's a bug/feature of mysql that will truncate a number at a character on input, in which case:
1) '33' = 33 2) '33a' = 33 3) 'a33' = nothing
try selecting something like this: select prd_id from product where
prd_id = '33a4';
and see what that gives you. Should just return 33 by my estimation. That's partially correct. It's actually a feature of SQL in general. If
SQL is expecting a number and gets a letter, it drops everything after the letter. Therefore: 33a = 33 a33 = nothing 3a3 = 3
"John" <dsklfjhsdk> wrote in message
news:vu************@corp.supernews.com... Thanks for the replies.
sure enough in mysql '3a3' = 3
but in oracle it always fails on a 'non-number' character. (Oracle 8i) Here's the output
SQL> select id from id_table where id = '6a7'; select plc_id from coop_placement where plc_id = '6a7' * ERROR at line 1: ORA-01722: invalid number
I think I prefer getting an error in queries like this. Most of the time
I like it that mysql will take nearly any query and give it a shot, but in
my apps I'd rather it crapped out.
Thanks JohnL
I think you might need to start validating some variables before sending
your queries to the database...
"SwissCheese" <Sw*********@cfl.rr.com> wrote in message
news:ZM*********************@twister.tampabay.rr.c om... "John" <dsklfjhsdk> wrote in message news:vt************@corp.supernews.com... Why does a select from table with an integer field return a row if I compare the integer to an alpha character?
notice that select prd_id from product where prd_id = 33; and select prd_id from product where prd_id = '33a'; both reutrun a row, the same row actually!
I noticed that this returns nothing: select prd_id from product where prd_id = 'a33';
So 'What Gives?'
I can't seem to track down any info about this so any insight would be great. (please notice that my version is 3.23.32)
Thanks in advandce JohnL
I would imagine it's a bug/feature of mysql that will truncate a number
at a character on input, in which case:
1) '33' = 33 2) '33a' = 33 3) 'a33' = nothing
try selecting something like this: select prd_id from product where prd_id
= '33a4';
and see what that gives you. Should just return 33 by my estimation.
That's partially correct. It's actually a feature of SQL in general. If SQL
is expecting a number and gets a letter, it drops everything after the
letter. Therefore:
33a = 33
a33 = nothing
3a3 = 3
Thanks for the replies.
sure enough in mysql '3a3' = 3
but in oracle it always fails on a 'non-number' character. (Oracle 8i)
Here's the output
SQL> select id from id_table where id = '6a7';
select plc_id from coop_placement where plc_id = '6a7'
*
ERROR at line 1:
ORA-01722: invalid number
I think I prefer getting an error in queries like this. Most of the time I
like it that mysql will take nearly any query and give it a shot, but in my
apps I'd rather it crapped out.
Thanks
JohnL
"Ryan Stewart" wrote in message news:fb********************@texas.net... "SwissCheese" wrote in message news:ZM*********************@twister.tampabay.rr.c om... "John" <dsklfjhsdk> wrote in message news:vt************@corp.supernews.com... Why does a select from table with an integer field return a row if I compare the integer to an alpha character?
notice that select prd_id from product where prd_id = 33; and select prd_id from product where prd_id = '33a'; both reutrun a row, the same row actually!
I noticed that this returns nothing: select prd_id from product where prd_id = 'a33';
So 'What Gives?'
I can't seem to track down any info about this so any insight would be great. (please notice that my version is 3.23.32)
Thanks in advandce JohnL
I would imagine it's a bug/feature of mysql that will truncate a number at a character on input, in which case:
1) '33' = 33 2) '33a' = 33 3) 'a33' = nothing
try selecting something like this: select prd_id from product where
prd_id = '33a4';
and see what that gives you. Should just return 33 by my estimation. That's partially correct. It's actually a feature of SQL in general. If
SQL is expecting a number and gets a letter, it drops everything after the letter. Therefore: 33a = 33 a33 = nothing 3a3 = 3
"John" <dsklfjhsdk> wrote in message
news:vu************@corp.supernews.com... Thanks for the replies.
sure enough in mysql '3a3' = 3
but in oracle it always fails on a 'non-number' character. (Oracle 8i) Here's the output
SQL> select id from id_table where id = '6a7'; select plc_id from coop_placement where plc_id = '6a7' * ERROR at line 1: ORA-01722: invalid number
I think I prefer getting an error in queries like this. Most of the time
I like it that mysql will take nearly any query and give it a shot, but in
my apps I'd rather it crapped out.
Thanks JohnL
I think you might need to start validating some variables before sending
your queries to the database... This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
by: Landers, Jason |
last post by:
I have two tables, meetings and tasks. In the meetings table I have meeting
information and a meeting index called id. In the tasks table I have task
information that is associated with various...
|
by: John |
last post by:
Why does a select from table with an integer field return a row if I compare
the integer to an alpha character?
Here's the info ( a straight copy and paste), then compare my two select...
|
by: Sam G |
last post by:
Hi folks,
What I'd like to do for a website I'm designing with PHP/MySQL is have
a number of registered users who can make friends with each other...
so if person 1 wants to be friends with...
|
by: Michael |
last post by:
I have a table that has the following fields:
tblECHECK
ID (autonumber identity column)
PTID
Batchnum
Page
DataPoint
DPValue
|
by: Carmen Gloria Sepulveda Dedes |
last post by:
Hello.
When I run the next query:
SELECT DATE_TRUNC('hour', TL.TAL005_DATE), TL.SRV_ID, TL.MSU_NUMBER,
DS.DESCRIPTION, DS.CALLTYPE, COUNT(*)
FROM OWNER_CATALOG.TAL005 TL,...
|
by: lbbs |
last post by:
every time I open my table and want to print I have to go to printer setup
to chance it to landscape and to change the margin size. Can you save
those settings?
|
by: jjturon |
last post by:
Can anyone help me??
I am trying to pass a Select Query variable to a table using Dlookup
and return the value to same select query but to another field.
Ex.
SalesManID ...
|
by: bughunter |
last post by:
simple query
select * from "Result" res where (res."QID" = 51541 or res."QID" =
51542)
works fine ("SRV-BL"."Result" ~ 900000 rows) and returns 36 rows
but update - no!
update...
|
by: lewindletter |
last post by:
Hi
If I do
Begin transaction
Stmt 1: select count(*) from tableA
If the count is zero, then proceed to the following
Stmt 2: insert "something" to tableA
Stmt 3: insert "something" to...
|
by: PinkBishop |
last post by:
I am using VS 2005 with a formview control trying to insert a record
to my access db. The data is submitted to the main table no problem,
but I need to carry the catID to the bridge table...
|
by: taylorcarr |
last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
|
by: Charles Arthur |
last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
|
by: aa123db |
last post by:
Variable and constants
Use var or let for variables and const fror constants.
Var foo ='bar';
Let foo ='bar';const baz ='bar';
Functions
function $name$ ($parameters$) {
}
...
|
by: ryjfgjl |
last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
|
by: ryjfgjl |
last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
|
by: emmanuelkatto |
last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud.
Please let me know.
Thanks!
Emmanuel
|
by: nemocccc |
last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers,...
| |