if exists table drop table ORACLE 存儲過程

CREATE OR REPLACE PROCEDURE DROPEXITSTABS
(TAB_NAME_IN IN varchar2) IS
 
   v_cnt Number;   
begin   
   select count(*)   
   into v_cnt   
   from user_tables   
   where table_name = upper(TAB_NAME_IN);   
 
    if v_cnt>0 then   
       execute immediate 'drop table ' || TAB_NAME_IN ||' purge';
    end If;   
end DROPEXITSTABS; 

call DROPEXITSTABS('ZYWSPT-ZYWSSJJ');

create table "ZYWSPT-ZYWSSJJ"
(
   ID                   NUMBER(20)                     not null,
   ZBDM                 NVARCHAR2(20)                  null,
   NBBSF                NVARCHAR2(30)                  null,
   SJYBSF               NVARCHAR2(30)                  null,
   SJYMC                NVARCHAR2(50)                  null,
   DY                   NVARCHAR2(200)                 null,
   SJLX                 NVARCHAR2(10)                  null,
   BSGS                 NVARCHAR2(10)                  null,
   YXZ                  NVARCHAR2(200)                 null,
   BZ                   NVARCHAR2(200)                 null,
   DLZ                  NVARCHAR2(20)                  null,
   DLSJ                 TIMESTAMP                      null,
   GXZ                  NVARCHAR2(20)                  null,
   GXSJ                 TIMESTAMP                      null,
   constraint "PK_ZYWSPT-ZYWSSJJ" primary key  (ID)
);