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Update src/unify/profiles-sync/sample-queries.md
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src/unify/profiles-sync/sample-queries.md

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@@ -197,5 +197,5 @@ By contrast, Segment Unify and incrementally-built Profiles Sync materialization
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#### What hash function is used for the external_id_hash field by Profile Sync?
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The value of the `external_id_hash` is a hash of the `external_id_type` and `external_id_value`, using SHA-1. This field corresponds the `primary_key` for the table. `hash ( external_id_type and external_id_value)`
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The `external_id_hash` is a hash of the `external_id_type` and `external_id_value` using SHA-1. This field corresponds to the `primary_key` for the table: `hash (external_id_type and external_id_value)`
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For example, in Big Query this is the logic, `TO_HEX(SHA1(concat(external_id_type, external_id_value))) as seg_hash`.

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