长春制作手机网站,新泰网站建设,Wordpress需要什么基础,深圳网络营销推广专员用oracle sql对数字进行操作: 取上取整、向下取整、保留N位小数、四舍五入、数字格式化取整(向下取整)#xff1a;select floor(5.534) from dual;select trunc(5.534) from dual;上面两种用法都可以对数字5.534向下取整#xff0c;结果为5.如果要向上取整 #xff0c;得到结…用oracle sql对数字进行操作: 取上取整、向下取整、保留N位小数、四舍五入、数字格式化取整(向下取整)select floor(5.534) from dual;select trunc(5.534) from dual;上面两种用法都可以对数字5.534向下取整结果为5.如果要向上取整 得到结果为6则应该用ceilselect ceil(5.534) from dual;四舍五入SELECT round(5.534) FROM dual;SELECT round(5.534,0) FROM dual;SELECT round(5.534,1) FROM dual;SELECT round(5.534,2) FROM dual;结果分别为 6, 6, 5.5, 5.53保留N位小数(不四舍五入)select trunc(5.534,0) from dual;select trunc(5.534,1) from dual;select trunc(5.534,2) from dual;结果分别是 5,5.5,5.53其中保留0位小数就相当于直接取整了。数字格式化select to_char(12345.123,99999999.9999) from dual;结果为12345.123select to_char(12345.123,99999999.9900) from dual;小数后第三第四为不足补0结果为12345.1230select to_char(0.123,99999999.9900) from dual;select to_char(0.123,99999990.9900) from dual;结果分别为 .123, 0.123
