在 SQL 语句中从字段中移除前导零

select substring(ColumnName, patindex('%[^0]%',ColumnName), 10)

If you want the query to return a 0 instead of a string of zeroes or any other value for that matter you can turn this into a case statement like this:

select CASE
WHEN ColumnName = substring(ColumnName, patindex('%[^0]%',ColumnName), 10)
THEN '0'
ELSE substring(ColumnName, patindex('%[^0]%',ColumnName), 10)
END

select replace(ltrim(replace(ColumnName,'0',' ')),' ','0')

select substring(substring('B10000N0Z', patindex('%[0]%','B10000N0Z'), 20),
patindex('%[^0]%',substring('B10000N0Z', patindex('%[0]%','B10000N0Z'),
20)), 20)

returns N0Z, that is, will get rid of leading zeroes and anything that comes before them.

To remove the leading 0 from month following statement will definitely work.

SELECT replace(left(Convert(nvarchar,GETDATE(),101),2),'0','')+RIGHT(Convert(nvarchar,GETDATE(),101),8)

Just Replace GETDATE() with the date field of your Table.

select ltrim('000045', '0') from dual;


LTRIM
-----
45

This should do.

I had the same need and used this:

select
case
when left(column,1) = '0'
then right(column, (len(column)-1))
else column
end

I borrowed from ideas above. This is neither fast nor elegant. but it is accurate.

CASE

WHEN left(column, 3) = '000' THEN right(column, (len(column)-3))


WHEN left(column, 2) = '00' THEN right(a.column, (len(column)-2))


WHEN left(column, 1) = '0' THEN right(a.column, (len(column)-1))


ELSE

END

You can use this:

SELECT REPLACE(LTRIM(REPLACE('000010A', '0', ' ')),' ', '0')

select CASE
WHEN TRY_CONVERT(bigint,Mtrl_Nbr) = 0
THEN ''
ELSE substring(Mtrl_Nbr, patindex('%[^0]%',Mtrl_Nbr), 18)
END

you can try this SELECT REPLACE(columnname,'0','') FROM table

You can try this - it takes special care to only remove leading zeroes if needed:

DECLARE @LeadingZeros    VARCHAR(10) ='-000987000'


SET @LeadingZeros =
CASE WHEN PATINDEX('%-0', @LeadingZeros) = 1   THEN
@LeadingZeros
ELSE
CAST(CAST(@LeadingZeros AS INT) AS VARCHAR(10))
END


SELECT @LeadingZeros

Or you can simply call

CAST(CAST(@LeadingZeros AS INT) AS VARCHAR(10))

To remove leading 0, You can multiply number column with 1 Eg: Select (ColumnName * 1)

Here is the SQL scalar value function that removes leading zeros from string:

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:      Vikas Patel
-- Create date: 01/31/2019
-- Description: Remove leading zeros from string
-- =============================================
CREATE FUNCTION dbo.funRemoveLeadingZeros
(
-- Add the parameters for the function here
@Input varchar(max)
)
RETURNS varchar(max)
AS
BEGIN
-- Declare the return variable here
DECLARE @Result varchar(max)


-- Add the T-SQL statements to compute the return value here
SET @Result = @Input


WHILE LEFT(@Result, 1) = '0'
BEGIN
SET @Result = SUBSTRING(@Result, 2, LEN(@Result) - 1)
END


-- Return the result of the function
RETURN @Result


END
GO

In case you want to remove the leading zeros from a string with a unknown size.

You may consider using the STUFF command.

Here is an example of how it would work.

SELECT ISNULL(STUFF(ColumnName
,1
,patindex('%[^0]%',ColumnName)-1
,'')
,REPLACE(ColumnName,'0','')
)

See in fiddler various scenarios it will cover

https://dbfiddle.uk/?rdbms=sqlserver_2012&fiddle=14c2dca84aa28f2a7a1fac59c9412d48