Cast and convert an oracle sql column

Question

Hi i have a table with a column name as emp id's in ORACLE SQL

Like 12 , 243 , 55457 etc. I want to cast it like in 15 digits to achieve a uniform pattern as below :

000000000000012
000000000000243
000000000055457

Any function to achieve the same ??

Answer 1

lpad函数使用填充文本将字符串的左侧填充到一定长度：

select lpad(col, 15, '0')