在黑斑羚上修剪前导零

Question

I have two sorts of accounts number, all of which are strings: some of them have leading zeros , others have been imported properly and do not have leading zeros;

How can I get rid of the leading zeros without trimming account numbers that are normal?

the ones with leading zeros are somewhat: 0000012345678

Those without leading zeros are: 1345678

How can I do that in Impala without trimming all the account numbers?From what I have seen there are always 5 leading zeros in those records with leading zeros.

Answer 1

Try this:

SELECT CAST( "0000012345678"  AS INT);

OR

SELECT regexp_replace( "0000012345678","^0+(?!$)","")

Answer 2

Try using REGEXP_REPLACE :

SELECT REGEXP_REPLACE('0000012345678', '^0*', '') AS number_out
FROM yourTable;

Answer 3

you can use substr()

select case when left(accountno)='00000' then substr(accountno,6,length(accountno)-5)
else accountno end
from yourtablename