MySQL导出表数据到文件的流程步骤

SELECT * INTO OUTFILE '/path/to/file.csv'
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n'
FROM your_table_name;

SELECT employee_id, first_name, last_name, hire_date
INTO OUTFILE '/tmp/employees.csv'
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
LINES TERMINATED BY '\n'
FROM employees
WHERE department_id = 10;

mysqldump -u username -p database_name table_name > output_file.sql

mysqldump -u root -p mydb employees > employees_backup.sql

mysqldump -u root -p --no-create-info mydb employees > employees_data.sql

mysqldump -u root -p --no-create-info --tab=/tmp --fields-terminated-by=',' --lines-terminated-by='\n' mydb employees

mysql -u username -p -e "SELECT * FROM database_name.table_name" > output.txt

SELECT * FROM table_name
INTO OUTFILE '/path/to/file.csv'
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n';

import csv
import pymysql

connection = pymysql.connect(host='localhost',
                             user='user',
                             password='passwd',
                             db='db_name')

try:
    with connection.cursor() as cursor:
        cursor.execute("SELECT * FROM table_name")
        with open('output.csv', 'w', newline='') as f:
            writer = csv.writer(f)
            writer.writerow([i[0] for i in cursor.description])  # 写入列名
            writer.writerows(cursor)
finally:
    connection.close()

SELECT * INTO OUTFILE '/path/to/file_part1.csv'
FROM big_table
WHERE id BETWEEN 1 AND 100000;

mysqldump -u root -p mydb employees | gzip > employees.sql.gz

SET unique_checks=0;
SET foreign_key_checks=0;
-- 导出操作
SET unique_checks=1;
SET foreign_key_checks=1;