Append character in front of a number + varchar

Question

I have a table named Table1 which has a varchar, named Col1. I want to create a Table2 and add a leading "0" in front of the contents of Col1.

How can I add a zero character to the front of a varchar? I have tried several ways but none seems to work.

Answer 1

Following query will create table2 with leading "0" for col1.

 select '0' + Col1 Col1 into table2
 from table1

If table2 is already created and you want to just populate data.

 insert into table2(Col1)
 select '0' + Col1
 from table1

Answer 2

Well, if you want to add 100 zeros, you can do:

select replicate('0', 100)+col1
. . . 

If you want leading zeros with a given length, then combine this with right():

select right(replicate('0', 10)+col1, 10)
. . .

If you need to insert these into another table, use insert or update on that table instead of select.

Answer 3

This should do what you want

insert into newTable select concat('0',col1),  ........... FROM oldTable