Mysql 創建表之前判斷表是否存在,如果存在則刪除已有表
DROP TABLE IF EXISTS SH_PLACARD_INFO;
Oracle 創建表之前判斷表是否存在,如果存在則刪除已有表
declare
num number;
begin
select count(1) into num from user_tables where table_name = upper('SH_PLACARD_INFO') ;
if num > 0 then
execute immediate 'drop table SH_PLACARD_INFO' ;
end if;
end;