This strikes me as solving a problem that the architecture is meant to avoid, but I have two related tables. The first: SummaryInput, has unique rows of [Asset ID]. The second, AssetReturn, has a bunch of calculations, including periodic (monthly) cash flows, etc., so many more rows, but many fewer columns and is related via [Asset ID]. As shown in SUmmaryInput below, each asset has a yield associated with it. I'd like to think I wouldn't have to flatten that column of data from SummaryInput into AssetReturn to conduct weighted average calculations, but I haven't figured out another way yet.
So the question is what's the way to get the Yield into AssetReturn table?
SUMMARYINPUT:
| Number | Asset ID | Project | Yield |
| 1 | EC135 (MSN 0467) | Alpha | 18.42% |
| 2 | EC135 (MSN 0472) | Alpha | 18.42% |
| 3 | EC145 (MSN 9084) | Alpha | 18.15% |
| 4 | H4 (MSN 4) | Bravo | 17.00% |
| 5 | H5 (MSN 5) | Bravo | 17.00% |
| 6 | H6 (MSN 6) | Bravo | 17.00% |
| 7 | H7 (MSN 7) | Bravo | 17.00% |
| 8 | H8 (MSN 😎 | Bravo | 17.00% |
| 9 | H9 (MSN 9) | Bravo | 17.00% |
| 10 | H10 (MSN 10) | Bravo | 17.00% |
| 11 | H11 (MSN 11) | Bravo | 17.00% |
| 12 | H12 (MSN 12) | Bravo | 17.00% |
| 13 | H13 (MSN 13) | Bravo | 17.00% |
| 14 | H14 (MSN 14) | Bravo | 17.00% |
| 15 | H15 (MSN 15) | Charlie | 18.32% |
| 16 | H16 (MSN 16) | Delta | 18.34% |
| 17 | H17 (MSN 17) | Echo | 14.61% |
| 18 | H18 (MSN 18) | Echo | 20.74% |
| 19 | H19 (MSN 19) | Echo | 18.17% |
Summarized Table of ASSETRETURN
| Number | Asset ID | Calendar Month | Yield |
| 1 | EC135 (MSN 0467) | 3/31/2019 | 18.42% |
| 2 | EC135 (MSN 0467) | 4/1/2019 | 18.42% |
| 3 | EC135 (MSN 0467) | 5/1/2019 | 18.42% |
| 4 | EC135 (MSN 0467) | 6/1/2019 | 18.42% |
| 5 | EC135 (MSN 0467) | 7/1/2019 | 18.42% |
| 6 | EC135 (MSN 0467) | 8/1/2019 | 18.42% |
| 244 | H4 (MSN 4) | 12/1/2020 | 17.00% |
| 245 | H4 (MSN 4) | 1/1/2021 | 17.00% |
| 246 | H4 (MSN 4) | 2/1/2021 | 17.00% |
| 247 | H4 (MSN 4) | 3/1/2021 | 17.00% |
| 248 | H4 (MSN 4) | 4/1/2021 | 17.00% |
| 249 | H4 (MSN 4) | 5/1/2021 | 17.00% |
