Question

I need to change every double precision field of a table to numeric(15,3) type,
how can i do this job quickly with a stored procedure that iterate through the field of a given table and if the type is double precision alter column to numeric ?

Answer 1

following query should return query to update these tables… you can add table filter if you want. Copy the result and run it.

select 'ALTER TABLE ' + table_name + ' ALTER COLUMN ' + column_name + 'TYPE numeric(15,3)'  
  from information_schema.columns 
 where data_type = 'double precision' 
       and table_name = 'YOUR_TABLE_NAME'

TEST IT BEFORE RUN IT. I DID NOT TEST THIS YET.