| assign table name to a variable [message #360458] |
Fri, 21 November 2008 01:39  |
shaksing
Messages: 115
Registered: November 2008
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Senior Member |
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Can i use a variable after assigning a table name to that variable?
For eg - product_table {its a table} as pt and using pt i can use any of the columns in select queries ? pt.column_name.
Is that possible ?
Please guide me.
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| Re: assign table name to a variable [message #360462 is a reply to message #360458] |
Fri, 21 November 2008 02:11  |
JRowbottom
Messages: 5933
Registered: June 2006
Location: Sunny North Yorkshire, ho...
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Senior Member |
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I'm afraid your question is very different to understand.
Can i use a variable after assigning a table name to that variable?
Yes. Of course you can.DECLARE
v_var varchar2(30);
BEGIN
SELECT table_name
INTO v_var
FROM all_tables
WHERE rownum = 1;
DBMS_OUTPUT.PUT_LINE(v_var);
END;
/
I'm pretty sure that's not what you wanted, but it is what you asked for,
It's possible that you're talking about table aliases, in which case you need to know that a table alias only has any meaning inside the query that it is defined in. You can't alias a table as 'PT' in query 1 and then use this alias to transfer data to a second query.
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| Re: assign table name to a variable [message #360471 is a reply to message #360458] |
Fri, 21 November 2008 02:30 |
shaksing
Messages: 115
Registered: November 2008
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Senior Member |
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Actually in my stored procedure i have a input variable "table_name" .
For eg :
CREATE OR REPLACE PROCEDURE hist_procedure(
IN ID VARCHAR2(20),
IN step NUMBER(3),
IN table_name VARCHAR2(40))
And i was trying to ask that can i assign the table_name into a variable?
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| Re: assign table name to a variable [message #360484 is a reply to message #360480] |
Fri, 21 November 2008 02:46 |
shaksing
Messages: 115
Registered: November 2008
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Senior Member |
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Sorry Michel but i couldn't get that.
CREATE OR REPLACE PROCEDURE hist_procedure(
IN ID VARCHAR2(20),
IN step NUMBER(3),
IN table_name VARCHAR2(40))
If for table_name i want to assign into a variable.
In which block i need to put this declaration. Either in IS or BEGIN ?
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| Re: assign table name to a variable [message #360487 is a reply to message #360484] |
Fri, 21 November 2008 02:50 |
JRowbottom
Messages: 5933
Registered: June 2006
Location: Sunny North Yorkshire, ho...
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Senior Member |
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You can do it in either the DECLARE section, or the main body of the code.CREATE OR REPLACE PROCEDURE TEST (p_var in varchar2) AS
v_var varchar2(30) := p_var;
BEGIN
.....
or
CREATE OR REPLACE PROCEDURE TEST (p_var in varchar2) AS
v_var varchar2(30);
BEGIN
v_var := p_var;
.....
I don't see the relation between this and your initial question though.
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| Re: assign table name to a variable [message #360490 is a reply to message #360487] |
Fri, 21 November 2008 02:57 |
shaksing
Messages: 115
Registered: November 2008
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Senior Member |
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THANKS JROW..... I AM A BEGINNER SO THINGS ARE NOT CLEAR WHEN I START , BUT AS QUESTIONS COME FROM YOUR SIDE .. THINGS STARTED TO BECOME CLEAR... I ALSO THAT BECAUSE OF THIS, MANY SENIOR MEMBERS GOT ANGRY..BUT THANKS FOR REPLYING AND HELPING ME OUT FROM SUCH SILLY QUESTIONS.
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