摘要:
1. 取四舍五入的几位小数 select round(1.2345, 3) from dual; 结果:1.235 2. 保留两位小数,只舍 select trunc(1.2345, 2) from dual; 结果:1.23 select trunc(1.2399, 2) from dual; 结 阅读全文
摘要:
select /*+ PARALLEL(t,4) */ * from table1 阅读全文