DB2LISTAPPLICATIONS
132.如何杀DB2的进程?
FORCEAPPLICATION(ID)
133.A用户安装DB2后,如何用B用户启动DATABASE?
在B用户下的.PROFILE中加上
./HOME/DB2INST/SQLLIB/DB2PROFILE
134.DB2中类似ORACLE的快照是?
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;
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;
154.CONCAT()
返回两个字符串的连接.
SELECTCONCAT(EMP_NO,EMP_NAM)FROMBSEMPMS;
155.YEAR()
返回数值的年部分.
SELECTYEAR(''2003/01/02'')FROMBSEMPMS;
156.VARCHAR()
返回字符串,日期型,图形串的可变长度的字符串表示.
SELECTVARCHAR(EMP_NAM,50)FROMBSEMPMS;
157.UCASE()ORUPPER()
返回字符串的大写.
SELECTUCASE(EMP_NAM)FROMBSEMPMS;
SELECTUPPER(EMP_NO)FROMBSEMPMS;
158.TRUNCATE()ORTRUNC()
从表达式小数点右边的位置开始截断并返回该数值.
SELECTTRUNCATE(345.6789,2)FROMBSEMPMS;
159.TIME()
返回一个数值中的时间.
SELECTTIME(''2001-03-19.12.30.123456'')FROMBSEMPMS;
160.SUBSTR(EXP1,EXP2)
返回EXP1串自EXP2处开始的子串.
SELECTSUBSTR(''CDNJFDJFJD'',5)FROMBSEMPMS;
SELECTSUBSTR(''CDNJFDJFJD'',5,2)FROMBSEMPMS;
