1>.NUMBER类型细讲: Oracle number datatype 语法:NUMBER[(precision [, scale])] 简称:precision –> p scale –> s NUMBER(p, s) 范围: 1 <= p <=38, -84 <= s <= 127 保存数据范围:-1.0e-130 <= number value < 1.0e+126 保存在机器内部的范围: 1 ~ 22 bytes 有效为:从左边第一个不...
1.2e-5 NUMBER(2,5) 0.00001 123.2564 NUMBER 123.2564 1234.9876 NUMBER(6,2) 1234.99 12345.12345 NUMBER(6,2) Error (有效位为5+2 > 6) 1234.9876 NUMBER(6) 1235 (s没有表示s=0) 12345.345 NUMBER(5,-2) 12300 1234567 NUMBER(5,-2) 1234600 12345678 NUMBER(5,-2) Error (有效位为8 > 7) 12...
scale是可选的。 SQL> drop tablet_number purge; Table dropped SQL> create tablet_number(id number(5), id1 number(5,3)); Table created SQL> insert intot_number values(10000.8999999999999999999×××99988888888888889,10.003); 1 row inserted SQL> insert intot_number values(10000.8999999999999999999×...
subtype My_Number is number; zero constant My_Number := 0.0; one constant My_Number := 1.0; two constant My_Number := 2.0; six constant My_Number := 6.0; toler constant My_Number := 0.00000000001; root_toler constant My_Number := toler/1000.0; root My_Number; prev_root My_Number; ...
oracle number类型 NUMBER类型细讲: Oracle number datatype 语法:NUMBER[(precision [, scale])] 简称:precision --> p scale --> s NUMBER(p, s) 范围: 1 <= p <=38, -84 <= s <= 127 保存数据范围:-1.0e-130 <= number value < 1.0e+126...
NUMBER类型细讲 Oracle number datatype 语法：NUMBER[(precision [, scale])]简称：precision --> p scale --> s NUMBER(p, s)范围：1 <= p <=38, -84 <= s <= 127 保存数据范围：-1.0e-130 <= number value < 1.0e+126 保存在机器内部的范围：1 ~ 22 bytes 有效位：从...
38代表总位数 3代表小数点后面位数 number(p,s)p:1~38 s:-84~127 p>0，对s分2种情况：1. s>0 精确到小数点右边s位，并四舍五入。然后检验有效数位是否<=p；如果s>p，小数点右边至少有s-p个0填充。2. s<0 精确到小数点左边s位，并四舍五入。然后检验有效数位是否<=p+|s| 123....
例如,对于数据类型为number(5,-3)的列,输入数值1267.9,则Oracle就会判断出数值1267.9的第|s|位数字为2,之后对该数字2进行四舍五入,由于2小于5,所以第|s|位数字相邻左边一个数字1不变没有增一,而(四舍五入后)从第|s|位数字算起其右边的所有数字都置为0,故最后实际存储到列里的值为1000(显示屏幕上的不...
oracle数字类型（Oraclenumerictype）oracle数字类型（Oracle numeric type）Analysis of Oracle basic data type storage format (two) -- digital type This article mainly describes the data of type NUMBER and how to store it in the database.The NUMBER type of Oracle is composed of three parts, the ...
Oracle只用NUMBER(m,n)就可以表示任何复杂的数值数据。 select table_name,column_name,data_type,data_length,data_precision,data_scale from dba_tab_columns a WHERE a.TABLE_NAME = 'T_IFS_TRANSMISSION_LOG'; --Data_type表示字段类型; --Data_length表示字段类型的长度; ...