number(p,s)p:1~38s:-84~127 p>0，對(duì)s分2種情況分析：1. s>0精確到小數(shù)點(diǎn)右邊s位，并四舍五入。然后檢驗(yàn)有效數(shù)位是否<=p；假如s>p，小數(shù)點(diǎn)右邊至少有s-p個(gè)0填充。2. s<0精確到小數(shù)點(diǎn)左邊s位，并四舍五入。然后檢驗(yàn)有效數(shù)位是否<=p+s(有效數(shù)位：從左邊第一個(gè)不為0的數(shù)算起)Value Datatype Stored Value 123.2564 NUMBER 123.2564 1234.9876 NUMBER(6,2) 1234.99 12345.12345 NUMBER(6,2) Error 1234.9876 NUMBER(6) 1235 12345.345 NUMBER(5,-2) 12300 1234567 NUMBER(5,-2) 1234600 12345678 NUMBER(5,-2) Error 123456789 NUMBER(5,-4) 123460000 1234567890 NUMBER(5,-4) Error 12345.58 NUMBER(*, 1) 12345.6 0.1 NUMBER(4,5) Error 0.01234567 NUMBER(4,5) 0.01235 0.09999 NUMBER(4,5) 0.09999 0.099996 NUMBER(4,5) Error