How to convert empty spaces into null values, using SQL Server?

Question

I have a table and the columns on this table contains empty spaces for some records. Now I need to move the data to another table and replace the empty spaces with a N

Answer 1

This code generates some SQL which can achieve this on every table and column in the database:

SELECT
   'UPDATE ['+T.TABLE_SCHEMA+'].[' + T.TABLE_NAME + '] SET [' + COLUMN_NAME + '] = NULL 
   WHERE [' + COLUMN_NAME + '] = '''''
FROM 
    INFORMATION_SCHEMA.columns C
INNER JOIN
    INFORMATION_SCHEMA.TABLES T ON C.TABLE_NAME=T.TABLE_NAME AND C.TABLE_SCHEMA=T.TABLE_SCHEMA
WHERE 
    DATA_TYPE IN ('char','nchar','varchar','nvarchar')
AND C.IS_NULLABLE='YES'
AND T.TABLE_TYPE='BASE TABLE'