Converting / Casting an nVarChar with Comma Separator to Decimal

Question

I am supporting an ETL process that transforms flat-file inputs into a SqlServer database table. The code is almost 100% T-SQL and runs inside the DB. I do not own the code

Answer 1

This works for me:

DECLARE @foo NVARCHAR(100)
SET @foo='12,345.67'

SELECT FLOOR(CAST(REPLACE(@foo,',','') AS DECIMAL(24,10)))

This is probably only valid for collations/culture where the comma is not the decimal separator (ie: Spanish)

Answer 2

While not necessarily the best approach for my situation, I wanted to leave a potential solution for future use that we uncovered while researching this problem.

It appears that the SqlServer datatype MONEY can be used as a direct cast for strings with a comma separating the non-decimal portion. So, where SELECT CAST('12,345.56' AS DECIMAL(24,10)) fails, SELECT CAST('12,345.56' AS MONEY) will succeed.

One caveat is that the MONEY datatype has a precision of 4 decimal places and would require an explicit cast to get it to DECIMAL, should you need it.

Answer 3

SELECT FLOOR (CAST(REPLACE([inputValue], ',', '') AS DECIMAL(24,10)))

Answer 4

try using REPLACE (Transact-SQL):

SELECT REPLACE('12,345.67',',','')

OUTPUT:

12345.67

so it would be:

SELECT FLOOR( CAST(REPLACE([input value],',','') AS DECIMAL(24,10)))