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Target customers: all users. Features released: Babelfish supports Tabular Data Stream (TDS), the SQL Server wire-protocol, and T-SQL, the Microsoft SQL Server query language. You can migrate the database of your application from a SQL Server instance to an ApsaraDB RDS for PostgreSQL instance for which Babelfish is enabled only by modifying a few lines of code. You do not need to switch database drivers or rewrite SQL statements. Scenarios You want to reduce the lisencing costs of SQL Server and migrate an SQL Server database to a PostgreSQL database. You want to migrate an SQL Server database to a PostgreSQL database but do not want to invest a lot of time and efforts in rewriting applications. You want to use the open source plug-in libraries of PostgreSQL, such as the PostGIS plug-in for spatio-temporal data analysis and the TimescaleDB plug-in for time series data analysis. You want to reduce the cost of two database engines.