How can I add a character into a specified position into string in SQL SERVER?

Question

I have a varchar field like:

195500
122222200

I need to change these values to:

1955.00
1222222.00

Answer 1

Query:

SELECT col,
       LEFT(col,len(col)-2) + '.' + RIGHT(col,2) as newcol
FROM Table1

Result:

|       COL |     NEWCOL |
|-----------|------------|
|    195500 |    1955.00 |
| 122222200 | 1222222.00 |