Add a new docs page 'Querying Columns'

docs/customization/querying-columns.md

@@ -0,0 +1,16 @@
+# Querying columns with SQL
+
+The model `int_all_columns` ([source](https://github.com/dbt-labs/dbt-project-evaluator/tree/main/models/marts/core/int_all_columns.sql)), created with the package, lists all the columns from all the dbt nodes (models, sources, seeds, snapshots, analyses)
+
+You can you use this model to answer questions like:
+
+- Are there any columns with the same name in different nodes?
+- Are there any columns without a description?
+- Are there any columns with the same name but different descriptions?
+- Are there any columns with names matching a regex?
+- Have any forbidden names been used for columns?
+
+
+## Defining additional tests that match your exact requirements
+
+- writing a model with `ref(int_all_columns)` with custom tests added for a specific use case

integration_tests/models/dbt_project_evaluator_schema_tests/core.yml

@@ -36,4 +36,4 @@ models:
       - dbt_utils.unique_combination_of_columns:
           combination_of_columns:
             - unique_id
-            - column_name
+            - name

integration_tests/models/dbt_project_evaluator_schema_tests/graph.yml

@@ -55,7 +55,7 @@ models:
       - dbt_utils.unique_combination_of_columns:
           combination_of_columns:
             - unique_id
-            - column_name
+            - name
 
   - name: stg_sources
     description: "Staging model from the graph variable, one record per source resource."