CODEWITHSUNDEEP
mysqlcsvload-data-infile
de1337ed
de1337ed

Reputation: 3325

Importing a csv into mysql via command line

I'm trying to import a very large .csv file (~4gb) into mysql. I was considering using phpmyadmin, but then you have a max upload size of 2mb. Someone told me that I have to use the command line.

I was going to use these directions to import it: http://dev.mysql.com/doc/refman/5.0/en/mysqlimport.html#c5680

What would be the command to set the first row in the .csv table as the column names in the mysql table? This option is available through phpmyadmin, so their must be a mysql command line version too, right?. Please help me. Thank you.

-Raj

Upvotes: 72

Views: 242500

Answers (9)

IAmNoob
IAmNoob

Reputation: 641

Most of the answers above are correct and revolve around uploading the data using terminal with local_infile but the problem with this approach is that if you are having shared hosting and phpMyAdmin instance then you might stuck with below where your shared hosting provider won't let you change the local_infile settings.

+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| local_infile  | OFF   |
+---------------+-------+

In order to get a workaround solution where I had to insert about 200,000 rows in the db. I wrote below shell script which did the job. You can increase or decrease the BATCH_SIZE as per your use case.

#!/bin/bash

# MySQL credentials
DB_HOST="host"
DB_USER="db_user"
DB_PASS="db_pass"
DB_NAME="db_name"
TABLE_NAME="table_name"

# Path to the CSV file
CSV_FILE="data.csv"

# Field Separator (comma in this case)
IFS=','

# Batch size
BATCH_SIZE=1000
counter=0
SQL_BATCH="INSERT INTO $TABLE_NAME (sub_category, product_name, product_composition, product_price, product_manufactured, product_desc, product_usp, product_interactions) VALUES "'),"

# Read CSV file line by line
while read -r sub_category product_name product_composition product_price product_manufactured product_desc product_usp product_interactions; do

  # Escape single quotes to prevent SQL syntax errors
  sub_category=$(echo "$sub_category" | sed "s/'/''/g")
  product_name=$(echo "$product_name" | sed "s/'/''/g")
  product_composition=$(echo "$product_composition" | sed "s/'/''/g")
  product_price=$(echo "$product_price" | sed "s/'/''/g")
  product_manufactured=$(echo "$product_manufactured" | sed "s/'/''/g")
  product_desc=$(echo "$product_desc" | sed "s/'/''/g")
  product_usp=$(echo "$product_usp" | sed "s/'/''/g")
  product_interactions=$(echo "$product_interactions" | sed "s/'/''/g")

  # Append the current row values to the SQL batch
  SQL_BATCH="$SQL_BATCH ('$sub_category', '$product_name', '$product_composition', '$product_price', '$product_manufactured', '$product_desc', '$product_usp', '$product_interactions'),"

  # Increment the counter
  ((counter++))

  # If we have reached the batch size, execute the SQL
  if [[ $counter -eq $BATCH_SIZE ]]; then
    # Remove the last comma and add a semicolon to complete the SQL statement
    SQL_BATCH="${SQL_BATCH%,};"
    
    # Execute the batch insert
    mysql -h "$DB_HOST" -u "$DB_USER" -p"$DB_PASS" -D "$DB_NAME" -e "$SQL_BATCH"
    
    # Reset the batch and counter
    SQL_BATCH="INSERT INTO $TABLE_NAME (sub_category, product_name, product_composition, product_price, product_manufactured, product_desc, product_usp, product_interactions) VALUES "
    counter=0
  fi

done < "$CSV_FILE"

# Execute the remaining records if there are any
if [[ $counter -gt 0 ]]; then
  # Remove the last comma and add a semicolon
  SQL_BATCH="${SQL_BATCH%,};"
  
  # Execute the remaining batch
  mysql -h "$DB_HOST" -u "$DB_USER" -p"$DB_PASS" -D "$DB_NAME" -e "$SQL_BATCH"
fi

echo "Data import complete."

This workaround solution might take some time in case of large data but does the job.

Upvotes: 0

Joshi
Joshi

Reputation: 2790

Most answers missing an important point like if you have created csv file exported from Microsoft Excel on windows and importing the same in linux environment, you will get unexpected result.

the correct syntax would be

load data local infile 'file.csv' into table table fields terminated by ',' enclosed by '"' lines terminated by '\r\n'

here the difference is '\r\n' as against simply '\n

Upvotes: 0

Luke Madhanga
Luke Madhanga

Reputation: 7487

I know this says command line, but just a tidbit of something quick to try that might work, if you've got MySQL workbench and the csv isn't too large, you can simply

  • SELECT * FROM table
  • Copy entire CSV
  • Paste csv into the query results section of Workbench
  • Hope for the best

I say hope for the best because this is MySQL Workbench. You never know when it's going to explode

If you want to do this on a remote server, you would do

mysql -h<server|ip> -u<username> -p --local-infile bark -e "LOAD DATA LOCAL INFILE '<filename.csv>'  INTO TABLE <table>  FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n'"

Note, I didn't put a password after -p as putting one on the command line is considered bad practice

Upvotes: 0

shingi
shingi

Reputation: 43

Another option is to use the csvsql command from the csvkit library.

Example usage directly on command line:

csvsql --db mysql:///test --tables yourtable --insert yourfile.csv

This can be executed directly on the command line, or built into a python or shell script for automation if you need to do this for a number of files.

csvsql allows you to create database tables on the fly based on the structure of your csv, so it is a lite-code way of getting the first row of your csv to automagically be cast as the MySQL table header.

Full documentation and further examples here: https://csvkit.readthedocs.io/en/1.0.3/scripts/csvsql.html

Upvotes: 1

Aravinthan K
Aravinthan K

Reputation: 1861

You can simply import by

mysqlimport --ignore-lines=1 --lines-terminated-by='\n' --fields-terminated-by=',' --fields-enclosed-by='"' --verbose --local -uroot -proot db_name csv_import.csv

Note: Csv File name and Table name should be same

Upvotes: 10

Niels van Adrichem
Niels van Adrichem

Reputation: 171

You could do a 

mysqlimport --columns='head -n 1 $yourfile' --ignore-lines=1 dbname $yourfile`

That is, if your file is comma separated and is not semi-colon separated. Else you might need to sed through it too.

Upvotes: 16

Rahul Arora
Rahul Arora

Reputation: 331

try this: 

mysql -uusername -ppassword --local-infile scrapping -e "LOAD DATA LOCAL INFILE 'CSVname.csv'  INTO TABLE table_name  FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n'"

Upvotes: 23

Balanivash
Balanivash

Reputation: 6867

Try this command

 load data local infile 'file.csv' into table table
 fields terminated by ','
 enclosed by '"'
 lines terminated by '\n'
 (column1, column2, column3,...)

The fields here are the actual table fields that the data needs to sit in. The enclosed by and lines terminated by are optional and can help if you have columns enclosed with double-quotes such as Excel exports, etc.

For further details check the manual.

For setting the first row as the table column names, just ignore the row from being read and add the values in the command.

Upvotes: 157

Bjoern
Bjoern

Reputation: 16314

For importing csv with a header row using mysqlimport, just add

--ignore-lines=N

(ignores the first N lines of the data file)

This option is described in the page you've linked.

Upvotes: 6

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