Initial commit: Organized PTC project structure with .gitignore and README

db/staging_queries.sql

@@ -0,0 +1,54 @@
+set search_path = budget_app, public;
+
+-- 1. Batch row count
+select import_batch, count(*) as row_count
+from staging_ptc_transactions
+group by import_batch
+order by import_batch desc;
+
+-- 2. Account code master candidates
+select
+    account_code_raw,
+    account_name_raw,
+    count(*) as txn_count
+from staging_ptc_transactions
+where coalesce(account_code_raw, '') <> ''
+group by account_code_raw, account_name_raw
+order by account_code_raw, account_name_raw;
+
+-- 3. Department master candidates
+select
+    department_name_raw,
+    count(*) as txn_count
+from staging_ptc_transactions
+where coalesce(department_name_raw, '') <> ''
+group by department_name_raw
+order by txn_count desc, department_name_raw;
+
+-- 4. Project code consistency check
+select
+    project_code_raw,
+    count(distinct project_name_raw) as distinct_project_names,
+    count(distinct project_type_raw) as distinct_project_types
+from staging_ptc_transactions
+where coalesce(project_code_raw, '') <> ''
+group by project_code_raw
+having count(distinct project_name_raw) > 1
+    or count(distinct project_type_raw) > 1
+order by project_code_raw;
+
+-- 5. Missing key values
+select
+    source_row_no,
+    transaction_date,
+    in_out,
+    account_code_raw,
+    project_code_raw,
+    project_name_raw,
+    description_raw
+from staging_ptc_transactions
+where coalesce(account_code_raw, '') = ''
+   or coalesce(project_code_raw, '') = ''
+   or coalesce(project_name_raw, '') = ''
+   or coalesce(description_raw, '') = ''
+order by source_row_no;