As a powerful and popular open source relational database management system, PostgreSQL has a significant market share in the database field. Its excellent scalability and stability make it the database of choice for many enterprises and projects. In many scenarios (development | production environment synchronization, backup and recovery verification, data migration, data merger, etc.), database data in different environments may lead to data inconsistencies. Therefore, data comparison between databases becomes crucial. .
The traditional comparison method of PostgreSQL database usually uses methods such as manual comparison query and writing custom scripts to compare differences. These methods suffer from the following problems:
- Time-consuming and error-prone : Manual operations are prone to inadvertent errors, and comparisons across large databases are time-consuming.
- Unscalable : As the amount of data grows, manual operations become more cumbersome, and it is difficult to adapt to complex data comparison requirements.
- Cannot be automated : manual intervention is required for each comparison, and automated difference monitoring cannot be achieved.
01 Technical advantages of NineData data comparison
The NineData database comparison function is a tool for comparing differences between databases. It is used to compare the differences in data and structures between two databases, helping you track database changes, discover problems, and quickly fix them. Compared with other data comparison tools, NineData database comparison has the following advantages:
- Complete functions : Supports PostgreSQL database table structure and data consistency comparison, and provides one-time comparison, periodic comparison, quick comparison and other comparison functions suitable for a variety of usage scenarios, covering complete objects and data types.
- Comprehensive data source support : In addition to PostgreSQL, it also supports multiple data sources such as MySQL, SQL Server, ClickHouse, Doris, SelectDB, and Redis.
- Simple and easy to use : The SaaS platform provides fully automated structure and data comparison services. It is ready to use and requires no installation. It does not rely on a specific operating system and does not require local installation of software, which greatly reduces the occupation of local storage resources.
- Visual interface : It has a simple and intuitive user interface that allows data comparison without complicated settings, and the comparison results are presented in intuitive charts and reports, allowing you to easily understand data differences.
- Strong performance : Based on large server clusters, combined with many core technologies such as intelligent data sharding, batch mixed inspection, and sampling inspection, it achieves strong comparative performance.
- Stable operation : Dynamically monitor and compare database load pressure, and dynamically adjust the load of comparison tasks according to the pressure threshold to ensure business stability.
- One-click difference repair : Automatically generate repair SQL for inconsistent content, and repair inconsistent data can be completed by simply copying and pasting, saving a lot of time and energy.
- Free to use : Compared with expensive commercial tools, NineData’s structure comparison and data comparison functions are free to use and are suitable for all users who need this function.
- Safe and reliable : The NineData platform has passed the third-level network security level protection certification of the Ministry of Public Security, providing high-level protection for enterprise information security.
02 Operation and use
2.1 One-minute quick configuration comparison task
▶︎ Data comparison
▶︎ Structural comparison
2.2 View comparison results
▶︎ Data comparison
▶︎ Structural comparison
2.3 Quickly fix inconsistent content
2.4 Verify the repair results
2.5 View task logs and monitoring indicators
03 Introduction to NineData data comparison
NineData data comparison is a cloud-native data comparison product with the high-efficiency ability to process 1 million records per second. It provides one-stop support and is suitable for IDC self-build, cloud host self-build and cloud database. NineData supports a variety of databases, including MySQL, SQL Server, PostgreSQL, Redis, MongoDB, ClickHouse, Doris, etc., and can perform structural comparison and data comparison between databases.
In addition, NineData also supports data consistency verification between homogeneous and heterogeneous data sources. Users can choose various comparison methods such as structural comparison, full comparison, sampling comparison, and periodic comparison. NineData can dynamically monitor the database load, adaptively adjust the comparison speed, and ensure the stability of the database. Rich data source support enables NineData to meet the needs of different customers. In addition, NineData has industry-leading coverage in terms of structure comparison, and is No. 1 in the industry in terms of object type and attribute coverage.