Microsoft SQL Server is known as one of the most popular relational database management systems due to its user-friendly environment, powerful capabilities and wide collections of tools and frameworks for administration tasks. However, it also has a few serious disadvantages that force some users consider migration from MS SQL to another DBMS:
- Relatively high cost of ownership
- Not full compliance with ISO SQL standard
- Strict licensing policy
There are three popular open-source databases that may eliminate two of the issues above:
- SQLite
- MySQL
- PostgreSQL
SQLite is a self-contained database management system for personal use, it does not support concurrent connections as consequently cannot be used an alternative for large multi-user projects
Unlike SQLite, MySQL offers common features that are expected from sophisticated RDBMS: strong security, scalability, backup and recovery, transactions and other powerful features. When talking about its disadvantages, here are the most of them:
- Full text search is not properly implemented
- ANSI SQL standard is not fully supported
- Transactions and parallel writes is supported in few engines only
Finally, PostgreSQL is the most sophisticated open-source RDBMS enriched with main capabilities of enterprise level commercial systems such as extensive backup, multi-level compression, flexible storage customization and many others. This makes it ideal choice for building and deploying large databases with high demands to data integrity and reliability.
SQL Server to Postgres Converter
Finding PostgreSQL the best alternative to the original DBMS, it is important to understand that migration from SQL Server or Azure SQLis quite complicated process that requires strong skills in database administration. Manual implementation of this procedure involves high risk of data loss or corruption, especially for corporate-scale data warehouses having complex database logic.
It is reasonable to use special software that automates database migration process. There are multiple tools that can move database from SQL Server to Postgres. Main criteria to choose the right product for this purpose are as follows:
- all modern versions of SQL Server and PostgreSQL must be supported including SAAS variations such as Azure SQL and Heroku
- primary database entries (schemas, data, indexes, constraints, views) must be processed
- options to merge or synchronize exiting PostgreSQL database with MS SQL data
- the program must allow to modify name, type and attributes of every column begin converted
- tools with command line support are preferable since this feature allows to script and schedule the migration process
SQL Server to Postgres converter by Intelligent Converters provides all feature listed above. The software toolprovides high performance of the migration (more than 20000 rows per second on an average modern system) due to low-levelreading and writingof the source and destination databases, it does not use any middleware. The converter offers the powerful option of filtering data to migrate v\ia SELECT-queries. This flexible feature can be used for wide range of purposes: filtering rows, excluding particular columns from migration, combining multiple tables into single one and many others.
Find more details about SQL Server to Postgres migration at the official site of Intelligent Converters.