Problem with execute procedure in PL/SQL Developer

Question

I this is my first attempt to create procedure and execute it. First I create simple table. DB scheme of table is here:

Table name: Ziaci

Columns:

Answer 1

I think you're writing command in "SQL Window". You should use "Command Window" to succesfully execute this line:

execute ziaci_proc('X','Y',1);

Answer 2

Calling stored procedures using execute as above is specific to SQL*Plus. In fact, SQL*Plus converts execute some_proc() into BEGIN some_proc(); END;, You can see this for yourself by attempting to call a procedure that doesn't exist:

SQL> execute some_proc()
BEGIN some_proc(); END;

      *
ERROR at line 1:
ORA-06550: line 1, column 7:
PLS-00201: identifier 'SOME_PROC' must be declared
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored