Query in Pl/Sql

Question

Hi All,
We have senario in which two sql statements are running in large volume.
So we decided to write those statements with execute immedate bcz to take the advantage of bind variables save parsing time in each execution.
for e.g
1st Approach
IF cond =1 THEN
execute immediate 'select sal from emp where empno = :1' into l_sal using p_empno;
ELSE
execute immediate 'select comm from emp where comm = :1' into l_sal using p_empno;
END IF;
OR
2nd Approach
IF cond =1 THEN
SELECT sal
INTO l_sal
FROM emp
WHERE empno = p_empno;
ELSE
SELECT comm
INTO l_sal
FROM emp
WHERE empno = p_empno;
END IF;
We are using database 10g.
Please suggest what would be the better approach and why?

Answer 1

Hi,
Bear in mind, Static SQL is anytime better then Dynamic SQL.
It will make your code easy to read, easy to maintain and also better performant.
Till date that is true for any Oracle DB version (Unless tehre are exceptions that i am not aware of).
Good thing about your Dynamic SQL is you are using Bind Variables, so anytime you need to use it keep up that practice.
Dynamic SQL should be used only when there is no scope to use Static SQL.
Cheers,
Bhushan