PL/SQL字符变量

Question

我表中的所有项目都是7位数.如果我输入6位数的东西,应该在开头显示0.(输出应为7位数.)

例如:

输入= 123456输出= 0123456

如何在Oracle SQL中编写它？

我试过了.但它不起作用.

cursor c1 is
into art_no_tmp1
select  art_no
from    barticles b
where   b.ean_no_1 = '789546584587';

cursor checklength is
into len_number
select length(art_no_tmp1)
from    dual;


if(len_number = 6) then
      return '0'+art_no_tmp1;
else
      return art_no_tmp1;
end if;

有没有人有想法？

Answer 1

使用TO_CHAR,使用领先的0 格式:

SQL> WITH DATA AS (
  2     SELECT 1       num FROM DUAL UNION ALL
  3     SELECT 12      num FROM DUAL UNION ALL
  4     SELECT 123     num FROM DUAL UNION ALL
  5     SELECT 1234    num FROM DUAL UNION ALL
  6     SELECT 12345   num FROM DUAL UNION ALL
  7     SELECT 123456  num FROM DUAL UNION ALL
  8     SELECT 1234567 num FROM DUAL
  9  )
 10  SELECT num, to_char(num, '0000000') FROM data;

       NUM TO_CHAR(NUM,'0000000')
---------- ----------------------
         1  0000001
        12  0000012
       123  0000123
      1234  0001234
     12345  0012345
    123456  0123456
   1234567  1234567