Database size impact

  • Hi

     I have a database size which has around 230 tables and around 5 char/varchar columns / table. I need to change these fields into nchar/nvarchar. What would be the impact. Maybe some ballpark figure.

    Is there some way I can get an accurate figure..

    Please help

    Rgds

    Kudla

  • As a general rule, you can figure about 2 times the size of the original field, * number of rows * number of tables.

    This will ballpark you i think.  Remember, to check DBCC ShowContig after the change to ensure your indexes are not too fragmented.

     

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