Firebird psql updating
Quirks like this can affect any data-changing DML operations, most often when the selection conditions involve a subquery.Cases have been reported where sort order interferes with expectations, without involving a subquery.This helps reduce any effect that FILESTREAM data might have on Database Engine performance.The SQL Server buffer pool is not used; therefore, this memory is available for query processing. The size and use of the data determines whether you should use database storage or file system storage.In 2011, Postgre SQL 9.1 was released with read-only support of this standard, and in 2013 write support was added with Postgre SQL 9.3.There are now a variety of Foreign Data Wrappers (FDW) available which enable Postgre SQL Server to different remote data stores, ranging from other SQL databases through to flat file.
clause in order to return values from the updated row.
Because of the way the execution of data-changing DML is implemented in Firebird, up to and including this version, the sets targeted for updating sometimes produce unexpected results.
clause, the assignment phrases, containing the columns with the values to be set, are separated by commas.
This separation can cause data management complexities.
Or, if the data is associated with structured storage, the file streaming capabilities and performance can be limited.