MySQL: Import CSV

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Sumber: https://www.mysqltutorial.org/import-csv-file-mysql-table/


Disini kita akan menggunakan LOAD DATA INFILE statement untuk import CSV file ke MySQL table.

Sebelum import, siapkan

  • Database yang akan menerima data.
  • CSV file yang kolom-nya persis dengan kolom tabel di database.
  • Account di MySQL database server, yang punya ijin FILE & INSERT.

Misalkan, kita mempunyai table discount dengan struktur

CREATE TABLE discounts (
    id INT NOT NULL AUTO_INCREMENT,
    title VARCHAR(255) NOT NULL,
    expired_date DATE NOT NULL,
    amount DECIMAL(10 , 2 ) NULL,
    PRIMARY KEY (id)
);


Cek lokasi tempat secure_file_priv

SHOW VARIABLES LIKE "secure_file_priv";
+------------------+-----------------------+
| Variable_name    | Value                 |
+------------------+-----------------------+
| secure_file_priv | /var/lib/mysql-files/ |
+------------------+-----------------------+

Copykan file .csv yang akan di upload ke /var/lib/mysql-files/

cp *csv /var/lib/mysql-files/


Load /var/lib/mysql-files/discounts.csv file ke discounts table.

LOAD DATA INFILE '/var/lib/mysql-files/discounts.csv' 
INTO TABLE discounts 
FIELDS TERMINATED BY ',' 
ENCLOSED BY '"'
LINES TERMINATED BY '\n'
IGNORE 1 ROWS;

Cek menggunakan

SELECT * FROM discounts;



discounts table data Transforming data while importing

Sometimes the format of the data does not match the target columns in the table. In simple cases, you can transform it by using the SET clause in the LOAD DATA INFILE statement.

Suppose the expired date column in the discount_2.csv file is in mm/dd/yyyy format. discount_2.csv file

When importing data into the discounts table, we have to transform it into MySQL date format by using str_to_date() function as follows:

LOAD DATA INFILE 'c:/tmp/discounts_2.csv' INTO TABLE discounts FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' IGNORE 1 ROWS (title,@expired_date,amount) SET expired_date = STR_TO_DATE(@expired_date, '%m/%d/%Y');

Importing file from client to a remote MySQL database server

It is possible to import data from client (local computer) to a remote MySQL database server using the LOAD DATA INFILE statement.

When you use the LOCAL option in the LOAD DATA INFILE , the client program reads the file on the client and sends it to the MySQL server. The file will be uploaded into the database server operating system’s temporary folder e.g., C:\windows\temp on Windows or /tmp on Linux. This folder is not configurable or determined by MySQL.

Let’s take a look at the following example:

LOAD DATA LOCAL INFILE 'c:/tmp/discounts.csv' INTO TABLE discounts FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' IGNORE 1 ROWS;

The only difference is the LOCAL option in the statement. If you load a big CSV file, you will see that with the LOCAL option, it will be a little bit slower to load the file because it takes time to transfer the file to the database server.

The account that connects to MySQL server doesn’t need to have the FILE privilege to import the file when you use the LOCAL option.

Importing the file from client to a remote database server using LOAD DATA LOCAL has some security issues that you should be aware of to avoid potential security risks. Importing CSV file using MySQL Workbench

MySQL workbench provides a tool to import data into a table. It allows you to edit data before making changes.

The following are steps that you want to import data into a table:

Open table to which the data is loaded. mysql workbench import csv

Click Import button, choose a CSV file and click Open button import csv into mysql

Review the data, click Apply button. edit table content Review Data

MySQL workbench will display a dialog “Apply SQL Script to Database”, click Apply button to insert data into the table.

We have shown you how to import CSV into MySQL table using LOAD DATA LOCAL and using MySQL Workbench. With these techniques, you can load data from other text file formats such as tab-delimited.



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