Data Dictionary Queries for SQL Server & Oracle

For SQL Server

–Finding all details of Primary Key constraint
select * from sysobjects
where xtype=’PK’

–Finding all details of Foreign Key constraint
select * from sysobjects
where xtype=’F’

–Finding all User-Defined objects (tables, etc)
select * from sysobjects
where xtype=’U’

–Finding all System objects
select * from sysobjects
where xtype=’S’

–Finding all user names
select * from sysusers

–Finding Column Names of Particular Table
–Select Pubs Database
select c.name from sysobjects o, syscolumns c
where o.id = c.id ando.name = ‘publishers’

For ORACLE
select * from sys.dba_objects
where owner = ‘scott’and object_type=’TABLE’
SELECT owner, object_name, object_type FROM sys.dba_objects
where object_type=’SEQUENCE’ and owner=’scott’;