Oscar Calderon wrote: > Everybody have a nice day. Well, finally the place where i currently work > paid me a chance to take the > Associate Certification exam and i'm reviewing some topics, specifically the > topics that the exam > covers (some of them are easy to me like psql, which i use almost everyday) > but i have doubt about 2 > of the topics and i don't know if i already have the knowledgement about > those topics. > > The topics are: > > * Postgres Data Dictionary: This is about information schema?
I am not sure because PostgreSQL does not use the term "data dictionary". It *might* be this refers to the information_schema, but my bet is that what is meant are the "system catalogs": http://www.postgresql.org/docs/current/static/catalogs.html Oracle uses the term "data dictionary" like that. > * Moving Data: This is about migration? Or about moving tablespaces in > the file system? I'm also not sure. Maybe it is refering to ALTER TABLE table_name SET TABLESPACE new_tablespace which will move the table to a different tablespace (different from "ALTER DATABASE db_name SET TABLESPACE new_tablespace", which will set the default for future tables). Other things that move data around are commands like CLUSTER, VACUUM FULL or forms of ALTER TABLE that rewrite the table, but I don't know if I would headline them "moving data". Yours, Laurenz Albe -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
