数据库：
通常，数据库是用于存储信息的数据结构。它是一个有组织的数据集合或存储，能够存储新数据或访问现有数据。可以使用数据库管理系统来组织存储在数据库中的数据。数据库管理员可以修改存储在数据库中的数据。数据库是使用客户端-服务器网络架构实现的。
区块链：
区块链是一个不断增长的记录列表，称为块，使用密码学链接。每个区块都包含前一个区块的加密哈希、时间戳和交易数据。在此，设计不允许修改数据。它允许分散控制并消除具有足够系统访问权限的其他方修改数据的风险。
区块链和数据库之间的主要区别是：
| Database | Blockchain | ||
|---|---|---|---|
| Database uses centralized storage of data. | Blockchain uses decentralized storage of data. | ||
| Database needs a Database admin or Database administrator to manage the stored data. | There is no administrator in Blockchain. | ||
| Modifying data requires permission from database admin. | Modifying data does not require permission. Users have a copy of data and by modifying the copies does not affect the master copy of the data as Blockchain is irresistible to modification of data. | Centralized databases keep information that is up-to-date at a particular moment | Blockchain keeps the present information as well as the past information that has been stored before. |
| Centralized databases are used as databases for a really long time and have a good performance record, but are slow for ertain functionalities. | Blockchain is ideal for transaction platform but it slows down when used as databases, specially with large collection of data. |