In oracle, if you pass string data to a field of type NUMBER, it will cause oracle to cast, affecting the efficiency of sql execution. Similarly, if you pass TIMESTAMP type data to a field that needs ...

Hello, I have an application that have 3 flavors of database: Oracle, SQL Server and Postgres. Using oracle_fdw I successfully transferred Oracle and SQL Server databases into Postgres. This was po ...

Abstract: Current information systems must deal with complex data management with regards on evolution over the time. There are several database systems with different data modelling principles, data ...