Insert-or-Update Preview
Before applying the load, show the action for the freshest version of each src_id from stg_users: freshness is determined by the greatest loaded_at, with larger id breaking ties. If the key is not in dim_users, action is INSERT; if it is already there, action is UPDATE. Return src_id and action, sorted by src_id.
Sampla aschuir a bhfuiltear ag súil leis
Seo é an chuma a bheadh ar fhreagra ceart — tá a líon rónna féin aige, ní gá dó na táblaí scéime a mheaitseáil.
| action | src_id |
|---|---|
| UPDATE | 101 |
| UPDATE | 102 |
| INSERT | 103 |
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