Perform INSERT with SELECT to insert multiple records

Question

In the diagram below there is a 1:1 relationship between \'DodgyOldTable\' and \'MainTable\'. Table \'Option\' contains records with \'OptionVal1\', \'OptionVal2\' and \'OptionV

Answer 1

My experience is it is often more easy and more readable to divide it up into smaller bits. So don't try to do everything in one single query. Especially when you are making migration scripts this should not be an issue.

Write down the steps, maybe introduce a temporary table, write the scripts to migrate your data and you are good to go!