Key override
A key override changes the Platform’s choice of best key for matching connected datasets, while using multiple key overrides can improve the match rate.
Using a key override, you can override the Platform’s automatic choice of best key for matching based on the highest key fill rate for connected datasets.
For example, you might have a pair of datasets with two keys: one containing relatively out-of-date data, and one containing data that is known to be current. Normally, InfoSum Platform will select the key with the higher key fill rate. Using a key override, you can tell InfoSum Platform to use a different key even if its fill rate is lower.
If you are using the Query Tool in the Platform, you can set key overrides as an advanced option. If you are using Audience Builder, you can set key overrides using the Key Override row.
Note: When performing insight queries between activation and insight datasets the key override source dataset must be the insight dataset and the destination dataset must be the activation dataset for any given key.
Counting and matching prioritized keys in key overrides
Overriding the Platform's automatically selected key creates a lower match rate, but adding multiple common keys in the prioritized key field can improve the match rate. If you choose to match on multiple keys, a match on any key counts toward the audience total (with multiple matches for a record counted only once) because it uses the OR function. If the datasets contain duplicates, changing the order of the keys can change the count total.