How to use execute immediate with variable table name and condition

Question

I want to create a PL/SQL function which is passed a table name and a condition, and which returns the number of rows than the condition meets on that table.

I creat

Answer 1

As illustrated above perfectly by Alex just to add make the exception handling generic as NO_DATA_FOUND will not be raised when we are doing COUNT(*).

CREATE OR REPLACE FUNCTION CHECK_EXISTS(
    TABLE_NAME VARCHAR2,
    CONDITION  VARCHAR2)
  RETURN NUMBER
AS
  VAL      NUMBER;
  SQL_CODE VARCHAR2(2000 CHAR):= 'SELECT COUNT (*) FROM '||TABLE_NAME||' WHERE '|| CONDITION;
BEGIN
  EXECUTE IMMEDIATE SQL_CODE INTO val;
  RETURN VAL;
EXCEPTION
WHEN OTHERS THEN --no data found may not get raised as we are doing count(*) here
  RETURN 0;
END;