正在看的db2教程是:IBM DB2 日常维护汇总（七）。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;