在线分析处理 (OLAP) –
在线分析处理由一种用于业务决策数据分析的软件工具组成。 OLAP 提供了一种环境，可以从一次从多个数据库系统检索的数据库中获取洞察力。
示例 –任何类型的数据仓库系统都是 OLAP 系统。 OLAP的用途如下：
- Spotify 分析了用户的歌曲，以提供他们歌曲和播放列表的个性化主页。
- Netflix 电影推荐系统。
在线事务处理 (OLTP) –
在线事务处理在 3 层架构中提供面向事务的应用程序。 OLTP 管理组织的日常事务。
示例 – OLTP 的用途如下：
- ATM 中心是一个 OLTP 应用程序。
- OLTP 在通过应用程序进行数据事务期间处理 ACID 属性。
- 它还用于网上银行、在线机票预订、发送短信、将一本书添加到购物车。
OLAP 与 OLTP 的比较 –
| OLAP (Online analytical processing) | OLTP (Online transaction processing) |
|---|---|
| Consists of historical data from various Databases. | Consists only operational current data. |
| It is subject oriented. Used for Data Mining, Analytics, Decision making,etc. | It is application oriented. Used for business tasks. |
| The data is used in planning, problem solving and decision making. | The data is used to perform day to day fundamental operations. |
| It reveals a snapshot of present business tasks. | It provides a multi-dimensional view of different business tasks. |
| Large amount of data is stored typically in TB, PB | The size of the data is relatively small as the historical data is archived. For ex MB, GB |
| Relatively slow as the amount of data involved is large. Queries may take hours. | Very Fast as the queries operate on 5% of the data. |
| It only need backup from time to time as compared to OLTP. | Backup and recovery process is maintained religiously |
| This data is generally managed by CEO, MD, GM. | This data is managed by clerks, managers. |
| Only read and rarely write operation. | Both read and write operations. |