摘要:
-- 7788 SCOTT ANALYST 7566 1987-04-19 3000.00 20 select * from emp as of timestamp sysdate-1*30/24/60--to_timestamp('2022-04-08 10:30:56','yyyy-mm-dd 阅读全文
摘要:
begin merge into emp_test a using emp b on (a.empno=b.empno) when matched then update set a.comm=b.comm when not matched then insert values(b.empno,b. 阅读全文