IBM DB2 日常维护汇总(七)

发表于:2007-07-13来源:作者:点击数: 标签:
DB2函数 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(),COV
  DB2函数
  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;

     

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