如何在SQL Server的varcher数据类型列中输入nvarchar数据类型？

Question

I have two tables tb1 and tb2 . tb1 has a column c1 of datatype varchar(15) and tb2 which is created from an Excel file using import/export in SQL Server has a column c2 of datatype nvarchar(255) . All data is numeric with digits ranging from 5 to 12. I want to update the data in c1 with the values in c2 , but while updating through a query I am getting an error:

String or binary data would be truncated

How can I update data of c1 with the values of c2 ?

Answer 1

The values in c2 probably have trailing spaces. Use the trim function to remove the spaces. Your update should be something like:

update tb1
set c1 = LTRIM(rtrim(tb2.c2))
from tb1
join tb2 on tb1.id=tb2.id

Answer 2

Your field is not big enough to hold your data. you cant put something that can be 255 characters long into something that`s 15 characters long.

You need to increase (c1) to at least varchar(255)