Merge branch 'master' into use-rest-v2

Author: omsn

23c-graph-demos/BankGraphDataset/BANK_ACCOUNTS.csv

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+Copyright (c) 2020, Oracle and/or its affiliates.  All rights reserved.
+
+You may not use the identified files except in compliance with the Universal Permissive License.
+
+You may obtain a copy of the License at https://oss.oracle.com/licenses/upl/

23c-graph-demos/BankGraphDataset/BANK_TRANSFERS.csv

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+-- Drop BANK_GRAPH and tables if they exist
+DROP PROPERTY GRAPH BANK_GRAPH;
+DROP TABLE BANK_TRANSFERS;
+DROP TABLE BANK_ACCOUNTS;
+
+-- create BANK ACCOUNTS table
+CREATE TABLE BANK_ACCOUNTS (
+    ID              NUMBER,
+    NAME            VARCHAR(400),
+    BALANCE         NUMBER(20,2)
+);
+
+-- create BANK_TRANSFERS table
+CREATE TABLE BANK_TRANSFERS (
+    TXN_ID          NUMBER,
+    SRC_ACCT_ID     NUMBER,
+    DST_ACCT_ID     NUMBER,
+    DESCRIPTION     VARCHAR(400),
+    AMOUNT          NUMBER
+);
+
+-- Add constraints
+ALTER TABLE BANK_ACCOUNTS ADD PRIMARY KEY (ID);
+ALTER TABLE BANK_TRANSFERS ADD PRIMARY KEY (TXN_ID);
+ALTER TABLE BANK_TRANSFERS MODIFY SRC_ACCT_ID REFERENCES BANK_ACCOUNTS (ID);
+ALTER TABLE BANK_TRANSFERS MODIFY DST_ACCT_ID REFERENCES BANK_ACCOUNTS (ID);
+
+-- Optionally verify constraints
+SELECT * FROM USER_CONS_COLUMNS WHERE table_name IN ('BANK_ACCOUNTS', 'BANK_TRANSFERS');
+
+-- At this point, you should load the BANK_ACCOUNTS.csv and BANK_TRANSFERS.csv files into the BANK_ACCOUNTS and BANK_TRANSACTIONS tables respectively
+-- Create a property graph view on bank_accounts and bank_transfers
+CREATE PROPERTY GRAPH BANK_GRAPH 
+    VERTEX TABLES (
+        BANK_ACCOUNTS
+        KEY (ID)
+        PROPERTIES (ID, Name, Balance) 
+    )
+    EDGE TABLES (
+        BANK_TRANSFERS 
+        KEY (TXN_ID) 
+        SOURCE KEY (src_acct_id) REFERENCES BANK_ACCOUNTS(ID)
+        DESTINATION KEY (dst_acct_id) REFERENCES BANK_ACCOUNTS(ID)
+        PROPERTIES (src_acct_id, dst_acct_id, amount)
+    );
+
+-- This query shows the graphs available for the current user    
+SELECT * FROM user_property_graphs;
+
+-- This query shows the DDL for the BANK_TRANSFERS graph 
+SELECT dbms_metadata.get_ddl('PROPERTY_GRAPH', 'BANK_GRAPH') from dual;
+
+-- This query shows the elements for the BANK_TRANSFERS graph
+SELECT * FROM user_pg_elements WHERE graph_name='BANK_GRAPH';
+
+-- This query shoes the labels and properties available in the BANK_TRANSFERS graph
+SELECT * FROM user_pg_label_properties WHERE graph_name='BANK_GRAPH';
+
+-- Find the top 10 accounts by incoming transfers 
+SELECT acct_id, COUNT(1) AS Num_Transfers 
+    FROM graph_table ( BANK_GRAPH 
+        MATCH (src) - [IS BANK_TRANSFERS] -> (dst) 
+        COLUMNS ( dst.id AS acct_id )
+    ) GROUP BY acct_id ORDER BY Num_Transfers DESC FETCH FIRST 10 ROWS ONLY;
+    
+-- Find the top 10 accounts in the middle of a 2-hop chain of transfers
+SELECT acct_id, COUNT(1) AS Num_In_Middle 
+    FROM graph_table ( BANK_GRAPH 
+        MATCH (src) - [IS BANK_TRANSFERS] -> (via) - [IS BANK_TRANSFERS] -> (dst) 
+        COLUMNS ( via.id AS acct_id )
+    ) GROUP BY acct_id ORDER BY Num_In_Middle DESC FETCH FIRST 10 ROWS ONLY;
+    
+-- List accounts that received a transfer from account 387 in 1, 2, or 3 hops
+SELECT account_id1, account_id2 
+    FROM graph_table(BANK_GRAPH
+        MATCH (v1)-[IS BANK_TRANSFERS]->{1,3}(v2) 
+        WHERE v1.id = 387 
+        COLUMNS (v1.id AS account_id1, v2.id AS account_id2)
+    );
+    
+-- Check if there are any 3-hop (triangles) transfers that start and end at the same account
+SELECT acct_id, COUNT(1) AS Num_Triangles 
+    FROM graph_table (BANK_GRAPH 
+        MATCH (src) - []->{3} (src) 
+        COLUMNS (src.id AS acct_id) 
+    ) GROUP BY acct_id ORDER BY Num_Triangles DESC;
+    
+-- Check if there are any 4-hop transfers that start and end at the same account
+SELECT acct_id, COUNT(1) AS Num_4hop_Chains 
+    FROM graph_table (BANK_GRAPH 
+        MATCH (src) - []->{4} (src) 
+        COLUMNS (src.id AS acct_id) 
+    ) GROUP BY acct_id ORDER BY Num_4hop_Chains DESC;
+
+-- Check if there are any 5-hop transfers that start and end at the same account
+SELECT acct_id, COUNT(1) AS Num_5hop_Chains 
+    FROM graph_table (BANK_GRAPH 
+        MATCH (src) - []->{5} (src) 
+        COLUMNS (src.id AS acct_id) 
+    ) GROUP BY acct_id ORDER BY Num_5hop_Chains DESC;
+
+-- List some (any 10) accounts which had a 3 to 5 hop circular payment chain 
+SELECT DISTINCT(account_id) 
+    FROM GRAPH_TABLE(BANK_GRAPH
+       MATCH (v1)-[IS BANK_TRANSFERS]->{3,5}(v1)
+        COLUMNS (v1.id AS account_id)  
+    ) FETCH FIRST 10 ROWS ONLY;
+
+-- Query accounts by number of 3 to 5 hops cycles in descending order. Show top 10. 
+SELECT DISTINCT(account_id), COUNT(1) AS Num_Cycles 
+    FROM graph_table(BANK_GRAPH
+        MATCH (v1)-[IS BANK_TRANSFERS]->{3, 5}(v1) 
+        COLUMNS (v1.id AS account_id) 
+    ) GROUP BY account_id ORDER BY Num_Cycles DESC FETCH FIRST 10 ROWS ONLY;
+
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