diff --git a/integration_tests/.example.env b/integration_tests/.example.env
new file mode 100644
index 0000000..2140d77
--- /dev/null
+++ b/integration_tests/.example.env
@@ -0,0 +1,7 @@
+CI_SNOWFLAKE_DBT_USER=
+CI_SNOWFLAKE_DBT_WAREHOUSE=
+CI_SNOWFLAKE_DBT_PASS=
+CI_SNOWFLAKE_DBT_ACCOUNT=
+CI_SNOWFLAKE_DBT_DATABASE=
+CI_SNOWFLAKE_DBT_ROLE=
+CI_SNOWFKALE_DBT_ROLE=
diff --git a/integration_tests/dbt_project.yml b/integration_tests/dbt_project.yml
index b29bc3e..3e25add 100644
--- a/integration_tests/dbt_project.yml
+++ b/integration_tests/dbt_project.yml
@@ -20,6 +20,28 @@ models:
 
 vars:
   running_intergration_tests: true
+  activity_schema_required_column_aliases:
+    ts: ts
+    customer: customer
+    activity: activity
+    activity_occurrence: activity_occurrence
+    activity_repeated_at: activity_repeated_at
+  activity_schema_primary_activity_columns:
+    - customer
+    - ts
+    - activity_occurrence
+    - activity_repeated_at
+    - activity_id
+    - activity
+    - anonymous_customer_id
+    - feature_json
+    - revenue_impact
+    - link
+  activity_schema_appended_activities_columns:
+    - name: feature_json
+      aggregation: min
+    - name: ts
+      aggregation: min
 
 seeds:
   dbt_activity_schema_integration_tests:
diff --git a/macros/dataclasses/columns.sql b/macros/dataclasses/columns.sql
index e38dcba..3e6da5c 100644
--- a/macros/dataclasses/columns.sql
+++ b/macros/dataclasses/columns.sql
@@ -4,17 +4,68 @@
 
 {% macro default__columns() %}
 
+{% set activity_schema_required_column_aliases = var(
+    "activity_schema_required_column_aliases",
+    dict(
+        ts = "ts",
+        customer = "customer",
+        activity = "activity",
+        activity_occurrence = "activity_occurrence",
+        activity_repeated_at = "activity_repeated_at"
+    )
+) %}
+
+{% set required_columns = [
+    "ts",
+    "customer",
+    "activity",
+    "activity_occurrence",
+    "activity_repeated_at"
+] %}
+
+{% set required_columns_provided = activity_schema_required_column_aliases.keys() | list %}
+{% if required_columns_provided != required_columns %}
+    {% set message %}
+    "Project variable 'activity_schema_required_column_aliases' must contain the following keys: " {{ required_columns }},
+    "Got: " {{ required_columns_provided }}
+    {% endset %}
+    {{ exceptions.raise_compiler_error(message)}}
+{% endif %}
+
+{% set activity_schema_primary_activity_columns = var(
+    "activity_schema_primary_activity_columns",
+    [
+        "activity_id",
+        "activity",
+        "anonymous_customer_id",
+        "feature_json",
+        "revenue_impact",
+        "link"
+    ]
+) %}
+
+{% set activity_schema_appended_activities_columns = var(
+    "activity_schema_appended_activities_columns",
+    [
+        dict(
+            name = "feature_json",
+            aggregation = "min"
+        ),
+        dict(
+            name = "ts",
+            aggregation = "min"
+        )
+    ]
+) %}
+
 {% do return(namespace(
-    activity_id = var("activity_stream_activity_id_col_name", "activity_id"),
-    ts = var("activity_stream_ts_col_name", "ts"),
-    customer = var("activity_stream_customer_col_name", "customer"),
-    activity = var("activity_stream_activity_col_name", "activity"),
-    anonymous_customer_id = var("activity_stream_anonymous_customer_id_col_name", "anonymous_customer_id"),
-    feature_json = var("activity_stream_feature_json_col_name", "feature_json"),
-    revenue_impact = var("activity_stream_revenue_impact_col_name", "revenue_impact"),
-    link = var("activity_stream_link_col_name", "link"),
-    activity_occurrence = var("activity_stream_activity_occurrence_col_name", "activity_occurrence"),
-    activity_repeated_at = var("activity_stream_activity_repeated_at_col_name", "activity_repeated_at")
+    ts = activity_schema_required_column_aliases["ts"],
+    customer = activity_schema_required_column_aliases["customer"],
+    activity = activity_schema_required_column_aliases["activity"],
+    activity_occurrence = activity_schema_required_column_aliases["activity_occurrence"],
+    activity_repeated_at = activity_schema_required_column_aliases["activity_repeated_at"],
+    primary_activity = activity_schema_primary_activity_columns,
+    appended_activities = activity_schema_appended_activities_columns
 )) %}
 
 {% endmacro %}
diff --git a/macros/dataset.sql b/macros/dataset.sql
index 10ea241..82f1072 100644
--- a/macros/dataset.sql
+++ b/macros/dataset.sql
@@ -15,7 +15,7 @@
 ) %}
 
 {# Create a derived dataset using self-joins from an activity stream model.
-    
+
 params:
 
     activity_stream_ref: ref()
@@ -25,7 +25,7 @@ params:
 
     primary_activity: primary_activity (dataclass)
         The primary activity of the derived dataset.
-            
+
     appended_activities: List[append_activity (dataclass)]
         The list of appended activities to self-join to the primary activity.
 #}
@@ -34,38 +34,33 @@ params:
 {% set stream = dbt_activity_schema.globals().stream %}
 {% set alias = dbt_activity_schema.alias %}
 
-with 
+with
 
 join_appended_activities as (
     select
-        stream.{{- columns.activity_id }},
-        stream.{{- columns.customer }},
-        stream.{{- columns.ts }},
-        stream.{{- columns.activity }},
-        stream.{{- columns.anonymous_customer_id }},
-        stream.{{- columns.feature_json }},
-        stream.{{- columns.revenue_impact }},
-        stream.{{- columns.link }},
-        stream.{{- columns.activity_occurrence }},
-        stream.{{- columns.activity_repeated_at }},
-
-        {% for activity in appended_activities %}{% set i = loop.index %}
-
-            stream_{{ i }}.{{ columns.ts }} as {{ alias(activity, columns.ts)}},
-            stream_{{ i }}.{{ columns.feature_json }} as {{ alias(activity, columns.feature_json)}}
-            
-        {%- if not loop.last -%},{% endif %}{% endfor %}
+        {% for col in columns.primary_activity %}
+        stream.{{- col }},
+        {% endfor %}
+
+        {% for activity in appended_activities %}{% set i = loop.index %}{% set last_outer_loop = loop.last %}
+            {% for col in columns.appended_activities %}
+
+        stream_{{ i }}.{{ col.name }} as {{ alias(activity, col.name)}}{% if not (last_outer_loop and loop.last) %},{% endif %}
+
+            {% endfor %}
+        {% endfor %}
 
     from {{ activity_stream_ref }} as stream
 
     {% for activity in appended_activities %}{% set i = loop.index %}
 
-        left join {{ activity_stream_ref }} as stream_{{ i }}
-            on (
-                stream_{{ i }}.{{ columns.customer }} = stream.{{ columns.customer }}
-                and stream_{{ i -}}.{{- columns.activity }} = {{ dbt.string_literal(activity.name) }}
-                and {{ activity.relationship.join_clause(i) }}
-            )
+    left join {{ activity_stream_ref }} as stream_{{ i }}
+        on (
+            stream_{{ i }}.{{ columns.customer }} = stream.{{ columns.customer }}
+            and stream_{{ i -}}.{{- columns.activity }} = {{ dbt.string_literal(activity.name) }}
+            and {{ activity.relationship.join_clause(i) }}
+        )
+
     {% endfor %}
 
     where stream.{{ columns.activity }} = '{{ primary_activity.name }}'
@@ -74,43 +69,27 @@ join_appended_activities as (
 
 aggregate_appended_activities as (
     select
-        {{ columns.activity_id }},
-        {{ columns.customer }},
-        {{ columns.ts }},
-        {{ columns.activity }},
-        {{ columns.anonymous_customer_id }},
-        {{ columns.feature_json }},
-        {{ columns.revenue_impact }},
-        {{ columns.link }},
-        {{ columns.activity_occurrence }},
-        {{ columns.activity_repeated_at }},
-
-        {% for activity in appended_activities %}{% set i = loop.index %}
-
-        min(
-            {{- alias(activity, columns.feature_json) -}}
-        ) as {{- alias(activity, columns.feature_json) -}},
+        {% for col in columns.primary_activity %}
+        {{- col }},
+        {% endfor %}
+
+        {% for activity in appended_activities %}{% set i = loop.index %}{% set last_outer_loop = loop.last %}
+            {% for col in columns.appended_activities %}
 
         {{ activity.relationship.aggregation_func }}(
-            {{- alias(activity, columns.ts) -}}
-        ) as {{ alias(activity, columns.ts) }}
+            {{- alias(activity, col.name) -}}
+        ) as {{ alias(activity, col.name)}}{% if not (last_outer_loop and loop.last) %},{% endif %}
 
-        {%- if not loop.last -%},{% endif %}{% endfor %}
+            {% endfor %}
+        {% endfor %}
 
     from join_appended_activities
     group by
-        {{ columns.activity_id }},
-        {{ columns.customer }},
-        {{ columns.ts }},
-        {{ columns.activity }},
-        {{ columns.anonymous_customer_id }},
-        {{ columns.feature_json }},
-        {{ columns.revenue_impact }},
-        {{ columns.link }},
-        {{ columns.activity_occurrence }},
-        {{ columns.activity_repeated_at }}
+        {% for col in columns.primary_activity %}
+        {{- col }}{% if not loop.last %},{% endif %}
+        {% endfor %}
 )
 
-select * from aggregate_appended_activities
+select *  from aggregate_appended_activities
 
 {% endmacro %}