SQL - Conversion Failed When Converting the Varchar Value to Data Type Int
Solution 1
The stupid mistake you talked about was the position of your '-1', it should have been after that closing bracket. So it should look like
SELECT * FROM DatabaseNameOne.SchemaOne.FileDetail fd
LEFT OUTER join DatabaseNameTwo.SchemaTwo.Packages p
ON (SUBSTRING(
RIGHT(fd.Ref1, CHARINDEX('-', REVERSE(fd.Ref1)) - 1),
PATINDEX('%[^0]%', RIGHT(fd.Ref1, CHARINDEX('-', REVERSE(fd.Ref1)) -1)),
LEN(RIGHT(fd.Ref1, CHARINDEX('-', REVERSE(fd.Ref1)) - 1))
)
) = p.PackageId
I tried this on my side and it worked as you expected
Solution 2
It's much easier than you're thinking, just converting to int
removes the zeroes:
SELECT CONVERT(int,'0001') --Outputs 1
This will work if the position of the -
can vary:
SELECT CONVERT(INT,RIGHT('0145972358-0001',LEN('0145972358-0001') - CHARINDEX('-','0145972358-0001')))
Otherwise you can simply:
SELECT CONVERT(int,RIGHT('0145972358-0001', 4))
Solution 3
If we can assume it is always the last 4 digits, just cast the varchar into an int, instead of trying to cast the int into a varchar (which is what causes the leading zeros problem):
SELECT * FROM DatabaseNameOne.SchemaOne.FileDetail fd
LEFT OUTER JOIN DatabaseNameTwo.SchemaTwo.Packages p
ON cast(right(fd.Ref1,4) as int) = p.PackageId
wibby35
Updated on June 04, 2022Comments
-
wibby35 almost 2 years
I apologize if this seems like an easy question. I am not the best with SQL and I am still learning, but I love to learn new things!
I have a derived varchar column that looks like this when selected from:
|Ref1 | |0145972358-0001| |5823647892-0002| |1697412356-0003| |6312548982-0004| ----- etc. ------
In my query, I am trying to join to another table based on everything to the right of the '-' in Ref1. Since the PK (PackageId) in the other table is a Varchar and does not have leading 0's, I need to trim down the leading 0's or else joining two Varchar datatypes would fail, since '0001' != '1'.
Here is snippets of my attempted queries so far:
SELECT * FROM DatabaseNameOne.SchemaOne.FileDetail fd LEFT OUTER join DatabaseNameTwo.SchemaTwo.Packages p ON (SUBSTRING( RIGHT(fd.Ref1, CHARINDEX('-', REVERSE(fd.Ref1) - 1)), PATINDEX('%[^0]%', RIGHT(fd.Ref1, CHARINDEX('-', REVERSE(fd.Ref1) - 1))), LEN(RIGHT(fd.Ref1, CHARINDEX('-', REVERSE(fd.Ref1) - 1))) ) ) = p.PackageId
And here is another query I have tried:
SELECT * FROM DatabaseNameOne.SchemaOne.FileDetail fd LEFT OUTER JOIN DatabaseNameTwo.SchemaTwo.Packages p ON (REPLACE(LTRIM(REPLACE(RIGHT(fd.Ref1, CHARINDEX('-', REVERSE(fd.Ref1) - 1)), '0', '')), '', '0')) = p.PackageId
When I run both of these I receive this error: Conversion failed when converting the varchar value to data type int.
I know it is probably something extremely stupid I'm missing, but I've been running into dead ends. Any help on this would be much appreciated! Thanks!
-
Jacob H about 6 years
SELECT CAST(RIGHT('0145972358-0001', 4) AS INT)
result1
something like this? -
Greg Viers about 6 yearsIs it always 4 digits at the end?
-
-
wibby35 about 6 yearsI knew it was something stupid! I tried this on my side and it worked as well. Thanks for your help!
-
Sumeet Kale about 6 yearsHappy to help. You can mark it as a answer if its working.