Rails - Sep 2008 - SQL - Merging fields from two tables into one, including dup

Hi,

I have two tables, nutritions and food_options.
nutritions has two fields, fooditem_id, taken and .
food_options has two fields, fooditem_id and taken.
fooditem_id in nutritions and food_options will point to id in
food_items table(third table).

I want to select all records from nutritions and food_options into a new
table, C with Fields fooditem_id and taken.  This means I need to
combine the values of fooditem_id in nutritions and fooditem_id in
food_options into one field (fooditem_id), including the duplicates in
both tables.

EX:
nutritions
id fooditem_id  taken
1    23           1
2    23           1

food_options
id fooditem_id  taken
1    34           1

C
id fooditem_id  taken
1    23           1
2    23           1
3    34           1

How can I do this?

thanks,
srinath
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