sql server - How do I BULK INSERT with additional column showing filename?

Question

I'm still getting used to SQL, so before I get to using stored procedure, I would like to understand how to use BULK INSERT effectively first.

I need to combine 50+ csv files and dump them into an SQL table. The problem is, I'd like to be able to tell each record apart (as in, each record belongs to a certain csv file, which I will identify by the file name).

Here's a small example of what I want:

CREATE TABLE ResultsDump
(
    PC FLOAT,
    Amp VARCHAR(50),
    RCS VARCHAR(50),
    CW VARCHAR(50),
    State0 VARCHAR(50),
    State1 VARCHAR(50),
)
BULK INSERT ResultsDump
    FROM 'c:distance1000_7_13_2010_1_13PM_Avery DennisonAD_2300008_10S_Lock.csv' 
    WITH 
    ( 
        FIRSTROW = 2, 
        MAXERRORS = 0, 
        FIELDTERMINATOR = ',', 
        ROWTERMINATOR = '
'
    )
BULK INSERT ResultsDump
    FROM 'c:distance1000_7_13_2010_2_27PM_Avery DennisonAD_2300009_10S_Lock.csv' 
    WITH 
    ( 
        FIRSTROW = 2, 
        MAXERRORS = 0, 
        FIELDTERMINATOR = ',', 
        ROWTERMINATOR = '
'
    )
BULK INSERT ResultsDump
    FROM 'C:distance1000_7_13_2010_2_58PM_Avery DennisonAD_230000A_10S_Lock.csv' 
    WITH 
    ( 
        FIRSTROW = 2, 
        MAXERRORS = 0, 
        FIELDTERMINATOR = ',', 
        ROWTERMINATOR = '
'
    )
BULK INSERT ResultsDump
    FROM 'c:distance1000_7_13_2010_3_21PM_Avery DennisonAD_230000B_10S_Lock.csv' 
    WITH 
    ( 
        FIRSTROW = 2, 
        MAXERRORS = 0, 
        FIELDTERMINATOR = ',', 
        ROWTERMINATOR = '
'
    )
BULK INSERT ResultsDump
    FROM 'c:distance1000_7_13_2010_3_41PM_Avery DennisonAD_230000C_10S_Lock.csv' 
    WITH 
    ( 
        FIRSTROW = 2, 
        MAXERRORS = 0, 
        FIELDTERMINATOR = ',', 
        ROWTERMINATOR = '
'
    )

I know this is an inefficient way of doing things, but I definitely like to figure out how to manually dump one file in the SQL table in the format I want before I start to create a stored procedure.

In the new table, I want something like this:

FileName,PC,Amp,RCS,CW,State0,State1
c:distance1000_7_13_2010_1_13PM_Avery DennisonAD_2300008_10S_Lock.csv, ...
...
...
c:distance1000_7_13_2010_2_27PM_Avery DennisonAD_2300009_10S_Lock.csv, ...
...
...
c:distance1000_7_13_2010_2_58PM_Avery DennisonAD_230000A_10S_Lock.csv, ...
...
...

Any simple suggestions or referrals to specific functions would be great! Remember, I'm getting used to SQL and it'd be great if I could take this one step at a time, that's why I'm starting with such a simple question.

Thanks in advance!

Answer 1

You can add a column FileName varchar(max) to the ResultsDump table, create a view of the table with the new column, bulk insert into the view, and after every insert, set the filename for columns where it still has its default value null:

CREATE TABLE dbo.ResultsDump
(
    PC FLOAT,
    Amp VARCHAR(50),
    RCS VARCHAR(50),
    CW VARCHAR(50),
    State0 VARCHAR(50),
    State1 VARCHAR(50),
)
GO

ALTER TABLE dbo.ResultsDump ADD [FileName] VARCHAR(300) NULL 
GO 

CREATE VIEW dbo.vw_ResultsDump AS
SELECT
    PC,
    Amp,
    RCS,
    CW,
    State0,
    State1
FROM
    ResultsDump
GO

BULK INSERT vw_ResultsDump
    FROM 'c:distance1000_7_13_2010_1_13PM_Avery DennisonAD_2300008_10S_Lock.csv' 
    WITH 
    ( 
        FIRSTROW = 2, 
        MAXERRORS = 0, 
        FIELDTERMINATOR = ',', 
        ROWTERMINATOR = '
'
    )

UPDATE dbo.ResultsDump 
SET [FileName] = 'c:distance1000_7_13_2010_1_13PM_Avery DennisonAD_2300008_10S_Lock.csv'
WHERE [FileName] IS NULL 

BULK INSERT vw_ResultsDump
    FROM 'c:distance1000_7_13_2010_2_27PM_Avery DennisonAD_2300009_10S_Lock.csv' 
    WITH 
    ( 
        FIRSTROW = 2, 
        MAXERRORS = 0, 
        FIELDTERMINATOR = ',', 
        ROWTERMINATOR = '
'
    )

UPDATE dbo.ResultsDump 
SET [FileName] = 'distance1000_7_13_2010_2_27PM_Avery DennisonAD_2300009_10S_Lock.csv'
WHERE [FileName] IS NULL