PL/SQL dynamic dynamic SQL SELECT block vs

Hello

I have a question about the best way to encode a dynamic SELECT INTO statement. Here are the 2 posiibilities I know:

_1. Dynamically, the execution of the SELECT statement and making use of the INTO clause the EXECUTE IMMEDIATE statement_

FUNCTION to CREATE or REPLACE get_num_of_employees (p_loc VARCHAR2, VARCHAR2 p_job)
RETURN NUMBER
IS
v_query_str VARCHAR2 (1000);
v_num_of_employees NUMBER;
BEGIN
v_query_str: = 'SELECT COUNT (*) FROM emp_.
|| p_loc
|| ' WHERE employment =: bind_job';
V_query_str EXECUTE IMMEDIATE
IN v_num_of_employees
Using p_job;
RETURN v_num_of_employees;
END;
/

_2. Encapsulation of the SELECT INTO statement in a block and dynamically exectuting the gabarit@sur

FUNCTION to CREATE or REPLACE get_num_of_employees (p_loc VARCHAR2, VARCHAR2 p_job)
RETURN NUMBER
IS
v_query_str VARCHAR2 (1000);
v_num_of_employees NUMBER;
BEGIN
v_query_str: = ' start
"SELECT INTO COUNT (*): into_bind FROM emp_"
|| p_loc
|| ' WHERE employment =: bind_job;
end;';
V_query_str EXECUTE IMMEDIATE
With the HELP of v_num_of_employees, p_job;
RETURN v_num_of_employees;
END;
/

I was wondering which way would be best? I know that the second method uses a variable binding for the INTO clause, but one also uses link varialbes (No. semicolon)? Differences in terms of efficiency or speed?

Thank you very much

Edited by: BYS2 October 19, 2011 01:23

SELECT Dynamics also links the output - it no worries.

The dynamic PL/SQL block would result in a change in additional context of PL/SQL for SQL inside the block. It would be a very slight overhead.

I'd go for the SELECT dynamic - I see no reason to associate a PL/SQL block.

Tags: Database

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----------------
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______________________________________________________________________________________________

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Published by: Vanessa B on 26 December 2012 14:29
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Published by: Vanessa B on 26 December 2012 14:45
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SQL> /

QUARTER
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NLSRTL Version 11.2.0.1.0 - Production

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See aggregation Techniques String

* 009 *.

PL/SQL dynamic dynamic SQL SELECT block vs

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