procedure pro_subpro
(
dw_in in varchar2,
cur out pkg_general.row_cursor
)
as
begin
open cur for
select yqmc from fle80 where dwbm=dw_in;
end pro_subpro;
procedure pro_mainpro(
dw_in in varchar2
)
as
mc nvarchar2(20);
cur pkg_general.row_cursor;
begin
pro_subpro(dw_in,cur);
fetch cur into mc;
loop
exit when cur%notfound;
dbms_output.put_line(mc);
fetch cur into mc;
end loop;
end pro_mainpro; 数学函数
在oracle 中distinct关键字可以显示相同记录只显示一条
1.绝对值
s:select abs(-1) value
o:select abs(-1) value from dual
2.取整(大)
s:select ceiling(-1.001) value
o:select ceil(-1.001) value from dual
3.取整（小）
s:select floor(-1.001) value
o:select floor(-1.001) value from dual
4.取整（截取）
s:select cast(-1.002 as int) value
o:select trunc(-1.002) value from dual
5.四舍五入
s:select round(1.23456,4) value 1.23460
o:select round(1.23456,4) value from dual 1.2346
6.e为底的幂
s:select exp(1) value 2.7182818284590451
o:select exp(1) value from dual 2.71828182
7.取e为底的对数
s:select log(2.7182818284590451) value 1
o:select ln(2.7182818284590451) value from dual; 1
8.取10为底对数
s:select log10(10) value 1
o:select log(10,10) value from dual; 1
9.取平方
s:select square(4) value 16
o:select power(4,2) value from dual 16
10.取平方根
s:select sqrt(4) value 2
o:select sqrt(4) value from dual 2
11.求任意数为底的幂
s:select power(3,4) value 81
o:select power(3,4) value from dual 81
12.取随机数
s:select rand() value
o:select sys.dbms_random.value(0,1) value from dual;
13.取符号
s:select sign(-8) value -1
o:select sign(-8) value from dual -1
14.圆周率
s:select pi() value 3.1415926535897931
o:不知道
15.sin,cos,tan 参数都以弧度为单位
例如：select sin(pi()/2) value 得到1（sqlserver）
16.asin,acos,atan,atan2 返回弧度
17.弧度角度互换(sqlserver，，oracle不知道)
degrees：弧度-〉角度
radians：角度-〉弧度
数值间比较
18. 求集合最大值
s:select max(value) value from
(select 1 value
union
select -2 value
union
select 4 value
union
select 3 value)a
o:select greatest(1,-2,4,3) value from dual
19. 求集合最小值
s:select min(value) value from
(select 1 value
union
select -2 value
union
select 4 value
union
select 3 value)a
o:select least(1,-2,4,3) value from dual
20.如何处理null值(f2中的null以10代替)
s:select f1,isnull(f2,10) value from tbl
o:select f1,nvl(f2,10) value from tbl
21.求字符序号
s:select ascii('a') value
o:select ascii('a') value from dual
22.从序号求字符
s:select char(97) value
o:select chr(97) value from dual
23.连接
s:select '11'+'22'+'33' value
o:select concat('11','22')33 value from dual
23.子串位置 --返回3
s:select charindex('s','sdsq',2) value
o:select instr('sdsq','s',2) value from dual
23.模糊子串的位置 --返回2,参数去掉中间%则返回7
s:select patindex('%d%q%','sdsfasdqe') value
o:oracle没发现，但是instr可以通过第四个参数控制出现次数
select instr('sdsfasdqe','sd',1,2) value from dual 返回6
24.求子串
s:select substring('abcd',2,2) value
o:select substr('abcd',2,2) value from dual
25.子串代替 返回aijklmnef
s:select stuff('abcdef', 2, 3, 'ijklmn') value
o:select replace('abcdef', 'bcd', 'ijklmn') value from dual
26.子串全部替换
s:没发现
o:select translate('fasdbfasegas','fa','我' ) value from dual
27.长度
s:len,datalength
o:length
28.大小写转换 lower,upper
29.单词首字母大写
s:没发现
o:select initcap('abcd dsaf df') value from dual
30.左补空格（lpad的第一个参数为空格则同space函数）
s:select space(10)+'abcd' value
o:select lpad('abcd',14) value from dual
31.右补空格（rpad的第一个参数为空格则同space函数）
s:select 'abcd'+space(10) value
o:select rpad('abcd',14) value from dual
32.删除空格
s:ltrim,rtrim
o:ltrim,rtrim,trim
33. 重复字符串