Solved

Select - Dynamic Schema

Posted on 2004-08-10
5
625 Views
Last Modified: 2010-05-18
Hi All,

I want to execute the following select:
Select * From schema.table;

I have this "schema" or username in a table, but how I can do this select ?

I have this username in a variable called "vUser":
Select userId into vUser from oracle_user;

And if I use:
Select * From vUser.table;

Oracle returns an error.

Do I have how to do this ?

Thanks,
root.
0
Comment
Question by:root_start
5 Comments
 
LVL 12

Expert Comment

by:catchmeifuwant
ID: 11761856
You need to use a Dynamic sql to execute in such cases..

Here's a sample. I'm connected as User2 and trying to query "dept" table owned by "demo" user.

------------
declare
v_user varchar2(10) := 'demo';
v_count number(3);
v_sql varchar2(100);

begin
v_sql := 'select count(*) from '||v_user||'.dept';  ------------- Dynamic SQL

execute immediate v_sql into v_count; ----------- Execute the SQL and store the results in v_count

dbms_output.put_line(v_count); -------- Print the output

end;
/

---------------

Output is :

4

PL/SQL procedure successfully completed.
0
 
LVL 34

Expert Comment

by:johnsone
ID: 11763343
If you are trying to write a SQL*Plus script, you can do something like this:

create table s (sname varchar2(30));
insert into table s values ('USER');
column sname new_value schema
select sname from s;

create table t (tname varchar2(30));
insert into table s values ('TABLE');
column tname new_value table
select tname from t;

Select * From &&schema..&&table;

0
 
LVL 3

Author Comment

by:root_start
ID: 12025376
I did the following to correct my problem:

In the begging of my procedure I put:

set verify off
Accept oracle_user Prompt 'Oracle User: '

And where I need to use the user I put:
&oracle_user..control_seq_func()

Thanks for all your help.

root
0
 

Accepted Solution

by:
modulo earned 0 total points
ID: 12591489
PAQed with points refunded (30)

modulo
Community Support Moderator
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Working with Network Access Control Lists in Oracle 11g (part 1) Part 2: http://www.e-e.com/A_9074.html So, you upgraded to a shiny new 11g database and all of a sudden every program that used UTL_MAIL, UTL_SMTP, UTL_TCP, UTL_HTTP or any oth…
How to Unravel a Tricky Query Introduction If you browse through the Oracle zones or any of the other database-related zones you'll come across some complicated solutions and sometimes you'll just have to wonder how anyone came up with them.  …
This video explains at a high level with the mandatory Oracle Memory processes are as well as touching on some of the more common optional ones.
This video shows information on the Oracle Data Dictionary, starting with the Oracle documentation, explaining the different types of Data Dictionary views available by group and permissions as well as giving examples on how to retrieve data from th…

914 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now