函数is_number(param) param为数字反回值为1,其他则返回为0
SQL CREATE OR REPLACE FUNCTION is_number (parmin VARCHAR2)
[color=green]//类似于写Java类,Class is_number (String parmin)[/color]
2 RETURN NUMBER[color=green]//返回值类型number[/color]3 IS
4 val NUMBER;
5 BEGIN//开始
6 val := TO_NUMBER (NVL (parmin, 'a'));[color=green]
//此句不懂啊![/color]7 RETURN 1;
8 EXCEPTION[color=green]//抛出异常[/color]
9 WHEN OTHERS[color=green]//while(OTHERS){THEN}[/color]
10 THEN
11 RETURN 0;
12 END;
13 /
SQL CREATE OR REPLACE FUNCTION is_number (parmin VARCHAR2)
[color=green]//类似于写Java类,Class is_number (String parmin)[/color]
2 RETURN NUMBER[color=green]//返回值类型number[/color]3 IS
4 val NUMBER;
5 BEGIN//开始
6 val := TO_NUMBER (NVL (parmin, 'a'));[color=green]
//此句不懂啊![/color]7 RETURN 1;
8 EXCEPTION[color=green]//抛出异常[/color]
9 WHEN OTHERS[color=green]//while(OTHERS){THEN}[/color]
10 THEN
11 RETURN 0;
12 END;
13 /