How to Efficiently Import CSV Files into SQL Server Using BULK INSERT and Handle Data Issues?

Mastering CSV Imports into SQL Server using BULK INSERT

This guide tackles common challenges when importing CSV data into SQL Server via the BULK INSERT command.

1. Data Containing Commas

Commas within data fields clash with the default CSV delimiter. The solution? Employ an alternative delimiter, such as '|'.

2. Double Quotes in Excel CSVs

BULK INSERT doesn't inherently handle double quotes. A post-import clean-up using REPLACE is necessary:

<code class="language-sql">UPDATE your_table
SET your_column = REPLACE(your_column, '"', '')</code>

3. Pinpointing Faulty Data

To identify and log rows causing import failures, leverage the ERRORFILE parameter. This redirects problematic rows to a specified error file.

<code class="language-sql">BULK INSERT YourTable
FROM 'C:\YourPath\YourFile.csv'
WITH (
    FIRSTROW = 2,
    FIELDTERMINATOR = ',',
    ROWTERMINATOR = '\n',
    ERRORFILE = 'C:\YourPath\ErrorLog.csv',
    TABLOCK
)</code>

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