I have to run a query in the loop in SQLPLUS. and the count of loop is coming from some other SQL query. So i have to declared a variable which will take the value of count. Now I want to use this variable in my query. How would i be able to do the same . Please suggest me Thanks in advance
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2 Answers
If I understand the question correctly, you can use a SQL*Plus variable coupled with a selected column to accomplish this:
SQL> undefine loop_ctr
SQL> column loop_ctr new_value loop_ctr noprint
SQL> select 5 AS loop_ctr from dual;
SQL> set serveroutput on
SQL> begin
2 for i in 1..&&loop_ctr
3 loop
4 dbms_output.put_line('i = ' || i);
5 end loop;
6 end;
7 /
old 2: for i in 1..&&loop_ctr
new 2: for i in 1.. 5
i = 1
i = 2
i = 3
i = 4
i = 5
SQL>
Hope that helps
Comments
BEGIN
DECLARE
count_loop NUMBER DEFAULT 0; -- counter coming from some other SQL query...
progressive_number NUMBER DEFAULT 0;
copy_count_loop NUMBER DEFAULT 0;
BEGIN
-- calculus generating the COUNT_LOOP value > 0.
copy_count_loop := count_loop;
FOR progressive_number IN 1 .. count_loop
LOOP
-- do your operations using copy_count_loop
END LOOP;
END;
END;
/
It is not so clear what would you like to do with COUNT_LOOP. I have made a copy of the counter before entering in the FOR cycle, so you can use COPY_COUNT_LOOP inside the FOR cycle, without affecting neither progressive_number variable, nor count_loop variable.
