分类:
2008-05-21 13:00:41
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135.AVG() 返回一组数值的平均值. SELECTAVG(SALARY)FROMBSEMPMS; 136.CORR(),CORRELATION() 返回一对数值的关系系数. SELECTCORRELATION(SALARY,BONUS)FROMBSEMPMS; 137.COUNT() 返回一组行或值的个数. SELECTCOUNT(*)FROMBSEMPMS; 138.COVAR(),COVARIANCE() 返回一对数值的协方差. SELECTCOVAR(SALARY,BONUS)FROMBSEMPMS; 139.MAX() 返回一组数值中的最大值. SELECTMAX(SALARY)FROMBSEMPMS; 140.MIN() 返回一组数值中的最小值. SELECTMIN(SALARY)FROMBSEMPMS; 141.STDDEV() 返回一组数值的标准偏差. SELECTSTDDEV(SALARY)FROMBSEMPMS; 142.SUM() 返回一组数据的和. SELECTSUM(SALARY)FROMBSEMPMS; 143.VAR(),VARIANCE() 返回一组数值的方差. SELECTVARIANCE(SALARY)FROMBSEMPMS; 144.ABS(),ABSVAL() 返回参数的绝对值. SELECTABS(-3.4)FROMBSEMPMS; 145.ACOS() 返回参数的反余弦值. SELECTACOS(0.9)FROMBSEMPMS; 146.ASCII() 返回整数参数最左边的字符的ASCII码. SELECTASCII('R')FROMBSEMPMS; 147.ASIN() 返回用弧度表示的角度的参数的反正弦函数. SELECTASIN(0.9)FROMBSEMPMS; 148.ATAN() 返回参数的反正切值,该参数用弧度表示的角度的参数. SELECTATAN(0.9)FROMBSEMPMS; 149.ATAN2() 返回用弧度表示的角度的X和Y坐标的反正切值. SELECTATAN2(0.5,0.9)FROMBSEMPMS; 150.BIGINT() 返回整型常量中的数字或字符串的64位整数表示. SELECTBIGINT(EMP_NO)FROMBSEMPMS; 151.CEILING()ORCEIL() 返回比参数大或等于参数的最小的整数值. SELECTCEILING(3.56)FROMBSEMPMS; SELECTCEIL(4.67)FROMBSEMPMS; 152.CHAR() 返回日期时间型,字符串,整数,十进制或双精度浮点数的字符串表示. SELECTCHAR(SALARY,',')FROMBSEMPMS; 153.CHR() 返回具有由参数指定的ASCII码的字符. SELECTCHAR(167)FROMBSEMPMS; |