writing sql queries to modify oracle DB

[soprano]

Hello everyone,

I am trying to write an sql query that drops a table from an oracle DB if it exists , otherwise it doesn't generate any errors.

I tried with this code : 

DECLARE

nb number;

BEGIN 

SELECT count *

into nb

FROM tables

WHERE table_name = 'my_table';

IF nb = 1 THEN

EXECUTE IMMEDIATE  'DROP TABLE my_table';

END IF;

END;

--DKU_END_STATEMENT

But it does not work. Can anyone help me please with the right syntax that conveys the goal !

Thank you so very much in advance.

[AlexT]

Hi,

To execute this you should use SQL Script recipe ( not an SQL Query recipe) https://doc.dataiku.com/dss/latest/code_recipes/sql.html#sql-script-recipe

Some formatting may have been lost when posting but the syntax should look like : 

DECLARE
  nb number;
BEGIN
  SELECT COUNT(*) INTO nb FROM user_tables WHERE table_name = 'my_table';
  IF nb = 1 THEN
    EXECUTE IMMEDIATE 'DROP TABLE my_table';
  END IF;
END;

--DKU_END_STATEMENT

Thanks