In SQL Server Management Studio (SSMS) 2008 R2, I wish to import a not-quite-properly formatted CSV into a database table. I was trying to use the wizard at
Differences from the CSV "standard"
- null values are represented by a space between commas
- some fields have commas in the middle of them and are not quote-escaped
- there is a terminal comma on all lines except the header line (WTF??)
I eventually addressed these issues manually by editing the CSV prior to import. Issue 2 was fixed by replacing commas with dashes for the 4 families of cell values that were causing it. Issue 3 I addressed with a search-and-replace for those terminal commas. Issue 1, which was a problem for numeric fields, also with a search-and-replace
, , ->
When my file did eventually import properly, null values were replaced with zeros, even though I had allowed null values in the field definitions.
My basic question: is there a way that I can alter the code for
CONVERT operations during an SSMS import? The only stage at which I could get to SQL code was in the field definitions of the created table (from
Select Source Tables and Views->
Edit SQL - which was available if and only if I hadn't changed the destination table name on the
Select Source Tables page), but that was just for the
CREATE TABLE definition and didn't address the import process at all. It really seems to me that I should be able to allow a single-character space string to be cast to a null value when converted to a number (instead the wizard fails and states that a value is out of bounds). Further, the null string certainly should be cast to the null value integer, rather than 0.
I can save a SSIS package but it wasn't clear to me how to edit and run that to allow for what I want to do. Is there a template file somewhere that I can edit to allow for null strings to be cast to null integer values (like something here....)? Is there a way to use parts of the Import Wizard to generate tSQL code? Should I instead use a
BULK INSERT statement rather than the wizard?