The following code encounters an error when executed in Microsoft Server Management Studion:
USE [DST]
GO
Select
CAST([Balance] as float)
FROM [RAW_XXX]
WHERE ISNUMERIC(Balance) = 1
Msg 8114, Level 16, State 5, Line 2
Error converting data type varchar to float.
I thought that the ISNUMERIC would exclude anything that can not be cast or converted.
It is a massive database in SQLServer 2012 so I am unsure how to find the data that is causing the error.
Use TRY_CONVERT to flush out the offending records:
SELECT *
FROM [RAW_XXX]
WHERE TRY_CONVERT(FLOAT, Balance) IS NULL;
The issue with your current logic is that something like $123.45 would be true according to ISNUMERIC, but would fail when trying to cast as floating point.
By the way, if you wanted a more bare bones way of finding records not castable to float you could just rely on LIKE:
SELECT *
FROM [RAW_XXX]
WHERE Balance NOT LIKE '%[^0-9.]%' AND Balance NOT LIKE '%.%.%';
The first LIKE condition ensures that Balance consists only of numbers and decimal points, and the second condition ensures that at most one decimal point appears. Checkout the demo below to see this working.
Demo
Related
I am trying to take an average of a column in my database. The column is AMOUNT and it is stored as NVARCHAR(300),null.
When I try to convert it to a numeric value I get the following error:
Msg 8114, Level 16, State 5, Line 1
Error converting datatype NVARCHAR to NUMBER
Here is what I have right now.
SELECT AVG(CAST(Reimbursement AS DECIMAL(18,2)) AS Amount
FROM Database
WHERE ISNUMERIC(Reimbursement) = 1
AND Reimbursement IS NOT NULL
You would think that your code would work. However, SQL Server does not guarantee that the WHERE clause filters the database before the conversion for the SELECT takes place. In my opinion this is a bug. In Microsoft's opinion, this is an optimization feature.
Hence, your WHERE is not guaranteed to work. Even using a CTE doesn't fix the problem.
The best solution is TRY_CONVERT() available in SQL Server 2012+:
SELECT AVG(TRY_CONVERT(DECIMAL(18,2), Reimbursement)) AS Amount
FROM Database
WHERE ISNUMERIC(Reimbursement) = 1 AND Reimbursement IS NOT NULL;
In earlier versions, you can use CASE. The CASE does guarantee the sequential ordering of the clauses, so:
SELECT AVG(CASE WHEN ISNUMERIC(Reimbursement) = 1 AND Reimbursement IS NOT NULL
THEN CONVERT(DECIMAL(18,2), Reimbursement))
END)
FROM Database;
Because AVG() ignores NULL values, the WHERE is not necessary, but you can include it if you like.
Finally, you could simplify your code by using a computed column:
alter database add Reimbursement_Value as
(CASE WHEN ISNUMERIC(Reimbursement) = 1 AND Reimbursement IS NOT NULL
THEN CONVERT(DECIMAL(18,2), Reimbursement))
END);
Then you could write the code as:
select avg(Reimbursement_Value)
from database
where Reimbursement_Value is not null;
Quote from MSDN...
ISNUMERIC returns 1 for some characters that are not numbers, such as plus (+), minus (-), and valid currency symbols such as the dollar sign ($). For a complete list of currency symbols, see money and smallmoney
select isnumeric('+')---1
select isnumeric('$')---1
so try to add to avoid non numeric numbers messing with your ouput..
WHERE Reimbursement NOT LIKE '%[^0-9]%'
If you are on SQLServer 2012,you could try using TRY_Convert which outputs null for conversion failures..
SELECT AVG(try_convert( DECIMAL(18,2),Reimbursement))
from
table
I am guessing that since it is Nvarchar you are going to find some values in there with a '$','.', or a (,). I would run a query likt this:
SELECT Amount
FROM database
WHERE Amount LIKE '%$%' OR
Amount LIKE '%.%' OR
Amount LIKE '%,%'
See what you get and my guess you will get some rows returned and then update those rows and try it again.
Currently your query would pull all numbers that are not all numeric which is a reason why it is failing too. Instead try running this:
SELECT AVG(CAST(Reimbursement AS DECIMAL(18,2)) AS Amount
FROM Database
--Changed ISNUMERIC() = to 0 for true so it will only pull numeric numbers.
WHERE ISNUMERIC(Reimbursement) = 0 and Reimbursement IS NOT NULL
I've 2 columns which I want to use a condition on. But I get this error message and my query is correct I'll come to that soon.
Msg 8114, Level 16, State 5, Line 1
Error converting data type varchar to float.
So this is the problem, I have a temp-table in which ID-number looks like this 9001011234 we can call it A, in the other one that I want to check with it looks like this 900101-1234 and this one for B this is the swedish format for Id-numbers.
So in my condition I want to check this to get the right amount and the correct result.
where A = B
The rest of the query is fine, when I remove this condition it gives me a result. It's just this one bit that is incorrect.
You have a VARCHAR format that can't be trivially transformed to a number. I'd use REPLACE(b,'-','') = a to fix the format, and let SQL Server take care of the rest.
Say:
where A = CAST(REPLACE(B, '-', '') AS float)
You are trying to compare values that are not the same datatype. eg Where 'one' = 1
You will need to convert one of the values to the same datatype as the other.
I have a table that saves the size of file in the database when the user uploads it. I want to get the average value of all the size that the user uploaded.
I have the following column as example that shows the size in Mb's
|Size|
|1.20|
|0.25|
|0.50|
The result that I want as average is something like this
|Size|
|0.65|
When I'm trying to get the average I get this error
Msg 8117, Level 16, State 1, Line 15 Operand data type nchar is
invalid for avg operator.
EDIT
I have changed the column type to nvchar and get this error message when I'm converting it to int
Conversion failed when converting the nvarchar value '0,24' to data
type int.
When I tried it with a decimal I get this error message
Msg 8114, Level 16, State 5, Line 11
Error converting data type nvarchar to numeric.
What can I do to fix this problem.
The error shows you have 0,24 as a number in Swiss or German format.
This is different to 0.24 in British or US format.
So if the datatype was correct as decimal or float, 0,24 would not be allowed because SQL Server does not really deal with continental number formats. See SQL server with german regional settings for more
Then, neither is integer either of course so the int conversion fails.
So, fix the column datatype and the data to fix the error. And you can also avoid nasty client number to string conversions like 24E-2 which is only recognised as float.
And what if you have thousand separators too with mixed format? Imagine this dataset
123.456,79
234,567.89
34E5
0,24
0.24
2.3E-1
Fixing the data will require some LIKE searches. At least these to fix each format one by one.
LIKE '%,%.%'
LIKE '%.%,%'
LIKE '%,%'
LIKE '%E%'
0.24 won't convert to an int as it has decimal part.
You need to do CAST([size] as DECIMAL(9,2)) or some such...
Although we could really do with seeing your code :)
To use this CAST as part of an aggregate...
SELECT [database], AVG(CAST([size] as DECIMAL(9,2))) AS [Average of Size]
FROM table
GROUP BY [database]
Of course I don't know what your table or query actually is...
As others have said - if you are are going to be taking the average anyway then you will be better off not converting the number to an NVARCHAR or VARCHAR in the first place and working with the plain numeric fields.
As gbn notes this is 0,24 continental format so...
SELECT [database], AVG(CAST(REPLACE([size],',','.') as DECIMAL(9,2))) AS [Average of Size]
FROM table
GROUP BY [database]
SELECT logicalTime, traceValue, unitType, entName
FROM vwSimProjAgentTrace
WHERE valueType = 10
AND agentName ='AtisMesafesi'
AND ( entName = 'Hawk-1')
AND simName IN ('TipSenaryo1_0')
AND logicalTime IN (
SELECT logicalTime
FROM vwSimProjAgentTrace
WHERE valueType = 10 AND agentName ='AtisIrtifasi'
AND ( entName = 'Hawk-1')
AND simName IN ('TipSenaryo1_0')
AND CONVERT(FLOAT , traceValue) > 123
) ORDER BY simName, logicalTime
This is my sql command and table is a view table...
each time i put "convert(float...) part " i get
Msg 8114, Level 16, State 5, Line 1
Error converting data type nvarchar to float.
this error...
One (or more) of the rows has data in the traceValue field that cannot be converted to a float.
Make sure you've used the right combination of dots and commas to signal floating point values, as well as making sure you don't have pure invalid data (text for instance) in that field.
You can try this SQL to find the invalid rows, but there might be cases it won't handle:
SELECT * FROM vwSimProjAgentTrace WHERE NOT ISNUMERIC(traceValue)
You can find the documentation of ISNUMERIC here.
If you look in BoL (books online) at the convert command, you see that a nvarchar conversion to float is an implicit conversion. This means that only "float"-able values can be converted into a float. So, every numeric value (that is within the float range) can be converted. A non-numeric value can not be converted, which is quite logical.
Probably you have some non numeric values in your column. You might see them when you run your query without the convert. Look for something like comma vs dot. In a test scenario a comma instead of a dot gave me some problems.
For an example of isnumeric, look at this sqlfiddle
Searched and searched on SO and can't figure it out
Tried CASTING each field as FLOAT to no avail, convert didn't get me any further
How can I get the below case clause to return the value stated in the THEN section?
Error:
Msg 8114, Level 16, State 5, Line 1
Error converting data type varchar to float.
section of my SQL query that makes it error:
When cust_trendd_w_costsv.terms_code like '%[%]%' and (prod.dbo.BTYS2012.average_days_pay) - (substring(cust_trendd_w_costsv.terms_code,3,2)) <= 5 THEN prod.dbo.cust_trendd_w_costsv.terms_code
average_days_pay = float
terms_code = char
Cheers!
Try to use ISNUMERIC to handle strings which can't be converted:
When cust_trendd_w_costsv.terms_code like '%[%]%'
and (prod.dbo.BTYS2012.average_days_pay) -
(case when isnumeric(substring(cust_trendd_w_costsv.terms_code,3,2))=1
then cast(substring(cust_trendd_w_costsv.terms_code,3,2) as float)
else 0
end)
<= 5 THEN prod.dbo.cust_trendd_w_costsv.terms_code
The issue that you're having is that you're specifically searching for strings that contain a % character, and then converting them (implicitly or explicitly) to float.
But strings containing % signs can't be converted to float whilst they still have a % in them. This also produces an error:
select CONVERT(float,'12.5%')
If you're wanting to convert to float, you'll need to remove the % sign first, something like:
CONVERT(float,REPLACE(terms_code,'%',''))
will just eliminate it. I'm not sure if there are any other characters in your terms_code column that may also trip it up.
You also need to be aware that SQL Server can quite aggressively re-order operations and so may attempt the above conversion on other strings in terms_code, even those not containing %. If that's the source of your error, then you need to prevent this aggressive re-ordering. Provided there are no aggregates involved, a CASE expression can usually avoid the worst of the issues - make sure that all strings that you don't want to deal with are eliminated by earlier WHEN clauses before you attempt your conversion
If your are sure that Substring Part returns a numeric value, You can Cast The substring(....) to Float :
.....and (prod.dbo.BTYS2012.average_days_pay) - (CAST(substring(cust_trendd_w_costsv.terms_code,3,2)) as float ) <= 5 ....