db2中的填充varchar数字为0

Question

有没有办法在DB2中存储为VARCHAR的数字之前填充0？

像这样：

some_column     result
-----------     ------
12          ==>  00012
123         ==>  00123
6454        ==>  06454

Answer 1

如果函数LPAD可用：

SELECT LPAD(some_column, 5, '0')
FROM table

否则，您可以使用RIGHT和REPEAT的组合：

SELECT RIGHT(REPEAT('0', 5) || some_column, 5)
FROM table

some_column  |  Concatenate five '0's to some_column  | Return the five rightmost characters
------------------------------------------------------------------------
    12       =>             0000012                   =>   00012
   123       =>            00000123                   =>   00123
  6454       =>           000006454                   =>   06454