How to implement automatic database backup using SQL?

You can achieve automatic database backup by writing a scheduled script. Here is a simple example script:

1. Create a backup script named backup.sh.

#!/bin/bash

# 设置数据库连接信息
DB_USER="your_db_user"
DB_PASS="your_db_password"
DB_NAME="your_db_name"

# 设置备份文件存储路径
BACKUP_DIR="/path/to/backup/directory"
DATE=$(date +%Y%m%d%H%M%S)
BACKUP_FILE="$BACKUP_DIR/$DB_NAME_$DATE.sql"

# 执行备份命令
mysqldump -u $DB_USER -p$DB_PASS $DB_NAME > $BACKUP_FILE

# 输出备份结果
if [ $? -eq 0 ]; then
  echo "Backup successful: $BACKUP_FILE"
else
  echo "Backup failed"
fi

1. Grant script execution permission.

chmod +x backup.sh

1. Schedule a timed task, such as performing backups every day at midnight.

crontab -e

Add the following content to the open file:

0 0 * * * /path/to/backup.sh

This way, you can automatically backup the database every early morning. You can also adjust the backup frequency and storage path of backup files according to your actual needs.