ORA-06550 : Oracle SqlPlus

declare
doesExists number:=0;
begin
select count(1) into doesExists from tab where tname = 'EOSS2G_GREEN_RLDEP';
if doesExists = 1 
then
    execute immediate 'drop table EOSS2G_GREEN_RLDEP';
    --execute immediate 'create table EOSS2G_GREEN_RLDEP as select * from EOSS2G_RLDEP';
else
    execute immediate 'create table EOSS2G_GREEN_RLDEP as select * from EOSS2G_RLDEP';
end if;
end;
/

내가 얻는 오류 메시지는 다음과 같습니다.

PLS-00103: Encountered the symbol "end-of-file" when expecting one of the following:

& = - + ; < / > at in is mod remainder not rem
<> or != or ~= >= <= <> and or like like2
like4 likec between || multiset member submultiset
Position: 28, Line: 2, Column: 21
SQL: declare
doesExists number:=0
^-- error here -- ORA-06550: line 2, column 21:

온라인에서 다양한 솔루션을 조사했지만 여전히 문제 해결에 도움이되지 않았습니다.

누군가가이 문제를 해결하도록 도울 수 있습니까?