Pointers? Find a programmer? Or at least someone comfortable with scripting... This isn't a simple flag your setting in an SQL row, you're creating rows in another table altogether based off the results of another query.
The SDK has a bunch of benefits over raw SQL as cvachovecj mentioned, this type of task wouldn't be recommended to do with raw sql, you could screw up your database enough that you might need to start over or at least restore it from an older point..
Alternatively use the GUI. It is quite powerful. In this case try going into "Settings" then "Manage Nodes". Tell it to "Group By:" and choose "Vendor". Then you will see all your Cisco devices in a group. Select that group and go to the NCM licensed column header and click on it once or twice. This will set it to sort by whether the node is NCM licensed or not, clicking again will change it from sorting ascending to descending. Select the nodes that are not licensed and go to the top and "Edit Properties". Go to the bottom and tell it to add all the nodes to NCM and what credentials to use and such. And there, your done - added all the missing nodes at once...
Another hint, once you have all the nodes sorted by whether they are in NCM or not, lets say you have 156 nodes that are not in NCM, but you have 250 nodes displayed on the page. Rather than individually selecting all of those, or selecting all and removing those that you don't want selected, adjust your "Page Size" to figure out the exact # of nodes and then select all when all you have are non-licensed NCM nodes being shown...