def abc(str,data): count = [] numMax = 0 for a in range(len(str)): if a == 0: temp = str.find(data, numMax, len(str)) else: temp = str.find(data, numMax+1, len(str)) if temp != -1: for i in range(len(data)): count.append(temp + i) elif numMax == 0 an
--行转列的函数-- CREATE OR REPLACE FUNCTION Calvin( col IN VARCHAR2,dw IN VARCHAR2) RETURN VARCHAR2 IS retval ); Sel_sql ); ---//SQL语句声明 BEGIN Sel_sql:='select '||col||' from TB5001 where dwdm='''|| dw||''''; execute immediate Sel_sql into retval ;--执行orac
--Oracle列转行函数LISTAGG() with tb_temp as( select 'China' 国家,'Wuhan' 城市 from dual union all select 'China' 国家,'Dongjing' 城市 from dual union all select 'China' 国家,'Xijing' 城市 from dual union all select 'Germany' 国家,'Berlin' 城市 from dual union all select
Description Given A,B,C, You should quickly calculate the result of A^B mod C. (1<=A,C<=1000000000,1<=B<=10^1000000). Input There are multiply testcases. Each testcase, there is one line contains three integers A, B and C, separated by a sin
在Sql语句的Select部分对字段编写标量函数是完全可以的,但是下面代码: select EmpNo,LastName from Emp 应当写为 select EmpNo,LastName from Emp where HireDate between '' and '' 如上所示重写这个语句后,DB2可以选择使用HireDate上的索引(如果存在这样一个索引).但是如果在使用了Year函数,DB2就无法使用该列的索引了. 虽然可以使用函数或表达式创建表达式索引,即便如此,仍然要尽可能像上面
当你的表X中有A,B两列,数据如下 A B a 1 a 2 a 3 b 1 b 2 b 3 想让数据以 a|1|2|3 , b|1|2|3 格式显示可使用listagg() 1.使用listagg() + group by select A,B,listagg(B,'|') within GROUP (order by A) C from X group by A; 2.使用listagg() + over(partition by ?) select A,B listagg(B,'|') w