Character Or Numeric As PK
Mar 14, 2001
Hello,
I am from the school of thought that you should in every case have your primary keys as numeric values only. However, where I currently work there is a project leader who is a recent FoxPro convert (I know, they are tough ones to crack). I made the suggestion recently that the keys in the table should be numeric and with him being the project leader and me just a lowely developer he said get lost. I made the point that later joining your tables together in a PK/FK relationship where the keys where character would be slower then with numeric keys. He didn't listen and now we are approaching production with a database that is really just a bunch of text file. He said that with SQL 7 it doesn't matter if the pk is numeric or character. I disagree. But I need solid documentation to take to him and to the managers to convince them. If anyone out there could advise me on this. And if anyone could give me or tell me where I could find documentation on why even in SQL 7 there is a need to use numeric keys that would be a great help and you would be making one more shop in this world a little bit more technically sound :-) Thank you in advance for your help.
kc
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Aug 2, 2007
HiI have a character field (char ot varchar) that I want to force only tocontain numeric characters.Can that be done by way of defining a constraint on the field ?or by any other way in the field/table definition ?What id the syntax ?Anyone have examples ?ThanksDavid Greenberg
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Sep 29, 2005
In SQL I need to be able to take a varchar parameter @Area and convert it to a float.
The input values for @Area I can't control. They can range from 6300 to 6,300 SqFt to 1.2 Acres .
So to convert this value to a float I basically look through the string and remove everything that isn't a number or a period. Then I would convert this value to square feet based on how large the number is.
Code:
DECLARE @k int, @Temp VarChar(25), @SqFt Float
SELECT@Temp = @Area
select @Temp
select @k = patindex('%[^0-9. ]%', @Temp)
while @k> 0
begin
select @Temp = replace(@Temp, substring(@Temp, @k, 1), '')
select @k= patindex('%[^0-9. ]%', @Temp)
end
If @Temp = ''
BEGIN
SET @Temp = '0'
END
SELECT @SqFt = Convert(Float, @Temp)
--Distinguish if it was acres or square feet
If (@SqFt > 750.00)
BEGIN
SET @SqFt = @SqFt
END
ELSE
BEGIN
SET @SqFt = (@SqFt * Convert(Float,43560) )
END
SELECT @SqFt
This works great except for one situation, If @Area is something like 6,300 Sq.Ft. . When I run it through the part that removes all non-numeric items and periods, I end up with 6300 .. . So to get around this I want to find the first letter in the string and then remove everything after it. Then take the result and run it through part that removes everything but the numbers and period.
However I can't find away to get the index of the alpha-numeric character and remove everything after it.
Thanks in advance!
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Jan 1, 2015
I have one table and this field is character field with save data in below.
Bonus_table->bonus_amt_field. Char(20)
======================================
Record information
0
Null
Blank
3
4
Null
Blank
if i want to convert this character field => change to numeric field to display ,how to handle "Blank" and "null" record?
The result expect:
0
0
0
3
4
0
0
I try this query but wrong message :
select cast(convert(numeric,3)bonus_amt) as bonus_amt
from test
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Aug 19, 2005
Hi All there -
I want to show the o/p of a cursor on a single line. There is a numeric variable that needs to be clubed with the character variable. If I use char() the o/p is not right.
How do I do that?
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Jul 5, 2002
I need a script to find the position of the first non-numeric in a telno field and delete from that point onwards.
Example: 01208 12345 (Work) would become 01208 12345
Has anybody come across this before ?
TIA
Neil.
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Sep 13, 2001
hi I have a table which contain an id field as a char(20)
The content of this field is combination of string and numbers as follow
id flag
--------- -----
38383
88585
18834
x4820
z4892
t9494
I need to update the flag field where first character in the id field is not numeric. HOw can I do that.
thanks for your hlep
Thanks
AL
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Sep 18, 2007
Hi guys/ladies I'm still having some trouble formatting a select statement correctly.
I am using a sqldatasource control on an aspx page. It is connecting via odbc string to an Informix database.
Here is my select statement cut down to the most basic elements.
SELECT commentFROM informix.ipr_stucomWHERE (comment > 70)
The column "comment" contains student grades ranging from 0-100 and the letters I, EE, P, F, etc. Therefore the column is of a char type. This is a problem because I cannot run the above statement without hitting an alpha record and getting the following error
"Character to numeric conversion error"
How can I write this statement where it will work in the datasource control and have it only look at numeric values and skip the alpha values?
I have tried case with cast and isnumeric... I don't think that I have the formating correct.
I have also used:
WHERE (NOT (comment = ' I' OR comment = ' EE' OR comment = ' NG' OR comment = ' WP' OR comment = ' WF' OR comment = ' P' OR comment = ' F'))
This works but is very clunky and could possibly break if other letters are input in the future. There has to be a better way.I am sorry for my ignorance and thanks again for your help.
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Jun 10, 2014
when I run below query I got Error of Arithmetic overflow error converting numeric to data type numeric
declare @a numeric(16,4)
set @a=99362600999900.0000
The 99362600999900 value before numeric is 14 and variable that i declared is of 16 length. Then why this error is coming ? When I set Length 18 then error removed.
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Mar 21, 2006
Guys
I'm getting the above when trying to populate a variable. The values in question are :
@N = 21
@SumXY = -1303765191530058.2251000000
@SumXSumY = -5338556963168643.7875000000
When I run, SELECT (@N * @SumXY) - (@SumXSumY * @SumXSumY) in QA I get the result OK which is -28500190448996439680147097583285.072256 ie 32 places to left of decimal and 6 to the right
When I try the following ie to populate a variable with that value I get the error -
SELECT R2Top = (@N * @SumXY) - (@SumXSumY * @SumXSumY)@R2Top is NUMERIC (38, 10)
Any ideas ??
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Oct 24, 2007
Hi,
I have one column in which i have Alpha-numeric data like
COLUMN X
-----------------------
+91 (876) 098 6789
1-567-987-7655
.
.
.
.
so on.
I want to remove Non-numeric characters from above (space,'(',')',+,........)
i want to write something generic (suppose some function to which i pass the column)
thanks in advance,
Mandip
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Jul 20, 2006
I need to replace Access Val() functions with similiar function in sql.
i.e. Return 123 from the statement: SELECT functionname(123mls)
Return 4.56 from the satement: SELECT functionname(4.56tonnes)
Any one with ideas please
Thanks
George
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May 17, 2015
I have a table that contains file paths as
ServernamefolderAfilenameA
ServernameFolderBFilenameB
and I need a query to return
ServernamefolderA
ServernameFolderB
I tried
SELECT DISTINCT left(Source, charindex('', Source)- 0) AS String
FROM Table
But that removes everything after the first and I need it to return all data before the last
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Aug 6, 2015
I have the following scenario, The contents of main file are like :
ServerCentral|||||forum|||||||||||||||is||||||the||best
so||||||be|||||on||||||||||||||||||||||||||||||||||||||||||||it
And I need the output in the following form:
ServerCentral=forum=is=the=best
so=be=on=it
The logic being that multiple and consecutive occurrences of the special character, here - pipe , should be replaced by a single special character.
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Apr 15, 2004
I have data in a column that starts with 1-4 characters followed by a dash then followed by an number of characters (ex: EU-Surgery).
How do I select everything to the right of the dash when the number of characters to the left of the dash varies?
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Aug 18, 2006
Hi,
I was trying to find numeric characters in a field of nvarchar. I looked this up in HELP.
Wildcard
Meaning
%
Any string of zero or more characters.
_
Any single character.
[ ]
Any single character within the specified range (for example, [a-f]) or set (for example, [abcdef]).
Any single character not within the specified range (for example, [^a - f]) or set (for example, [^abcdef]).
Nowhere in the examples below it in Help was it explicitly detailed that a user could do this.
In MS Access the # can be substituted for any numeric character such that I could do a WHERE clause:
WHERE
Gift_Date NOT LIKE "####*"
After looking at the above for the [ ] wildcard, it became clear that I could subsitute [0-9] for #:
WHERE
Gift_Date NOT LIKE '[0-9][0-9][0-9][0-9]%'
using single quotes and the % wildcard instead of Access' double quotes and * wildcard.
Just putting this out there for anybody else that is new to SQL, like me.
Regards,
Patrick Briggs,
Pasadena, CA
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Oct 1, 2014
I'd like to return the left-most character from an 8 character string & the third from the left character too.
Like this ABC00123 returns AC
$query = "SELECT LEFT(uninum,3), RIGHT(uninum,5), clmarea, Date FROM tblunimov";
$result = mysql_query($query) or die(mysql_error());
echo "<div class='tblstyle1'>";
echo "<table class='tblstyle1'>";
echo "<tr><th>ini</th><th>item</th><th>area</th><th>date</th></tr>";
while($row = mysql_fetch_array($result)){
[Code] ....
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Feb 1, 2008
Hi!
I have a table like this below and it doesn't only contain English Names but it also contain Chinese Name.
CREATE TABLE Names
(FirstName NVARCHAR (50),
LastName NVARCHAR (50));
I tried to view the column using SQL Query Analyzer, It didn't display Chinese Character.
I know that SQL Server 2005 is using UCS-2 Encoding and Chinese Character uses Double Byte Character Set (DBCS) Encoding.
I want to read the FirstName and LastName columns and display in Window Form Data Grid and ASP.NET Grid View.
I tried to use this code below and it didn't work. It convert some of the English Name to Chinese Character and it display the chinese character and some still in the original unreadable characters.
Does anybody know how to read those character from SQL Table and display the correct Chinese Character without converting the English Name into Chinese also?
Thanks
int codePage = 950;
StringBuilder message = new StringBuilder();
Encoding targetEncoding = Encoding.GetEncoding(codePage);
byte[] encodedChars= targetEncoding.GetBytes(str);
.
message.AppendLine("Byte representation of '" + str + "' in Code Page '" + codePage + "':");
for (int i = 0; i < encodedChars.Length; i++)
{
message.Append("Byte " + i + ": " + encodedChars);
}
message.AppendLine(" RESULT : " + System.Text.Encoding.Unicode.GetString(encodedChars));
Console.Writeline(message.ToString());
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Sep 6, 2001
Hi everyone,
In sql server 7.0 what does in mean when we have numeric(4,3). What does precision and scale means?
Thank you
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Sep 7, 2004
The data type in the table is decimal with a precision set to 19 and a scale set to 2 and nothing for the default value.
I need to use updates or inserts that will allow a value of nothing or null to be inserted.
UPDATE TableName SET fldAmount = '' WHERE fldIssue = 'ABC'
But this fails because of the amount field.
This statement works, but is not good for me because 0 is not accurate.
UPDATE TableName SET fldAmount = '0' WHERE fldIssue = 'ABC'
How can I insert nothing?
Thanks
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Mar 22, 2006
Hello,Im calling a stored proc that has a numeric value as a varible.In the asp im using the code:myPrivate.Parameters.Add("@memberID", SqlDbType.Decimal, 18).Value = Decimal.Parse(uxToText.Text);I'm using decimal as there is no numeric sqldb type, is this correct? Also is the decimal parse correct as Im getting a 'Input string was not in a correct format' error.Thanks
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Jun 20, 2001
Is there a numeric data type that formats the number with commas - eg 1000 becomes 1,000 and 1000000 becomes 1,000,000.
Having tried several numeric data types the commas are removed. I tried entering 1000 into MS Access on the same machine and hey presto - it spits out 1,000.
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Jan 14, 2007
for example, in a query,
select * from abc where emp_no = N'1234567';
I get the same results if I use this:
select * from abc where emp_no = '1234567';
so what's the point of using the 'N' in front of the numeric value?
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Mar 12, 2008
Hi--
Got a column with int value and I need to sum the entire column by converting to a numeric.-- here what I have
select isnull(convert(varchar(15),sum(cast(columnName as numeric))),'0.00') from myTable-- But my outcome doesnt have decimal 0.00
any help?
Josephine
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Dec 20, 2007
All,
I'm having trouble with a query where I need to limit a resultset by comparing (using a WHERE clause) a field that is alphanumeric with one that is numeric. I've tried converting, casting, and case statements, but I either get an overflow error or a big slap on the wrist by SQL Server 2005. Does anyone have any good solutions to this? I've been racking my brain for a while now.
Thanks for the help!
-Scott Mescall
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Nov 15, 2007
I'm trying to run ab insert statement:
INSERT INTO [AdventureWorksDW].[dbo].[DimSaleType]
([SaleType]
,[Description])
VALUES
('I',
'Internet Sales')
.... Error:
Msg 8152, Level 16, State 4, Line 1
String or binary data would be truncated.
The statement has been terminated.
Table info
-------------
SaleType pk char(1)
SaleTypeDescription nchar(10)
It seems that the primary key field accepts numeric data, isn't it possible to have a primary key with non-numeric data? This is because this is a lookup table with a small number of rows.
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Nov 20, 2007
I am keep getting an arithmetic overflow converting float to type numeric when running a script that looks something like this.
insert into table1
(
column1
)
select
column2
from source server.
column1 is a numeric (28,8) and column2 is float.
there are about 2000000 records in column2, and I know that when I tried just copying the top 1000000 wasn't a problem.
does anyone know what could be causing this problem???
*it's not because the data in column2 is out of range.
thank you
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Jul 12, 2007
I want to fin out the number of records that are not numeric on my database, how can I fin that using an SQL query?
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Dec 13, 2007
Hi guys, how do i convert a decimal to numeric data type?
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May 15, 2008
Here's my LINQ code:pl = (from p in db.Table where p.ID == 1 orderby p.NumericField descending select p).Take(7);
As you can see, I'm trying to sort by a numeric field. Specifically, it's a Numeric(5,0) field.
Problem is, the results aren't coming back numeric order. If this is good LINQ code, perhaps it's something else in my app. I just want to make sure this LINQ code is good.
Thanks in advance
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Jan 9, 2004
I'm using a DTS package to import a large CSV file. There is a particular column that contains text or numbers. I want to delete the row if that column has a number, I've used IsNumeric in the selection portion of the statement, but can't figure out how to use it as part of my where clause.
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Jul 23, 2004
I have a database table with 2 numeric fields. The values to be inserted into these fields come from text boxes in an ASP.NET page. So in the parameters to add into these fields I simply use 'textbox1.text' & textbox2.text'.
One of the fields accepts the data within the text box and adds it into the appropriate numeric data field in the table. However on the other text box I get an error message 'Error converting data type nvarchar to numeric.'
Does anyone know why this occurs just on the one entry and not the other?, and if anyone has any suggestions on how to get around this please let me know.
Many Thanks
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Dec 9, 2001
Have imported a file from AS400 into SQL and get the Date numeric as yyyymmdd.
How do I get is as a Datetime.
Example:
Delivery Date 20011201 (numeric)
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