Sytem table name for schema

Question

SELECT SYS_CONTEXT ('USERENV', 'CURRENT_SCHEMA') 
   FROM DUAL;

Gives the current Schema, I am trying to build function DB2 equivalent to Oracle SYS_CONTEXT . I am not getting how oracle is selecting schema name. Any system table where it stores all schema name is some one have any insight please help

Answer 1

Any system table where it stores all schema name

You could use the *_USERS view to get the schema names. In Oracle , schema name and username are synonymous.

For example, to get all the schema names:

SELECT username FROM all_users;

To see the current user:

SELECT username FROM user_users;

If you are using SQL*Plus , you could simply do:

SHOW USER