diff --git a/project1/c.sql b/project1/c.sql
new file mode 100644
index 0000000..665d525
--- /dev/null
+++ b/project1/c.sql
@@ -0,0 +1,69 @@
+DROP TABLE IF EXISTS addressRelations;
+CREATE TABLE addressRelations (addr1 int, addr2 int);
+CREATE TEMPORARY TABLE tempRelations (addr1 int, addr2 int);
+-------------------------------------
+-- Tx that has more than one input
+CREATE OR REPLACE VIEW joint_control_transactions
+AS SELECT tx_id
+FROM inputs
+GROUP BY tx_id
+HAVING count(*)>1;
+-------------------------------------
+-- Tx that pass serial control check
+CREATE OR REPLACE VIEW serial_control_transactions
+AS SELECT tx_id
+FROM inputs
+JOIN outputs
+USING (tx_id)
+GROUP BY tx_id
+HAVING count(*)=1;
+-------------------------------------
+--insert joint control results (contains symmetric and reflexive results)
+INSERT INTO tempRelations
+SELECT inputs.sig_id, joint_tx_with_addr.sig_id 
+FROM inputs 
+RIGHT OUTER JOIN (
+    SELECT tx_id, sig_id 
+    FROM joint_control_transactions  
+    JOIN inputs 
+    USING (tx_id)
+) 
+AS joint_tx_with_addr 
+USING (tx_id);
+-------------------------------------
+--insert serial control results
+INSERT INTO tempRelations
+SELECT sig_id, pk_id
+FROM inputs 
+JOIN outputs 
+USING (tx_id)
+WHERE tx_id IN (SELECT tx_id FROM serial_control_transactions);
+-------------------------------------
+-- clean up reflexivity
+DELETE
+FROM tempRelations
+WHERE addr1 = addr2;
+-------------------------------------
+-- Temporary table for storing symmetrical rows
+CREATE TEMPORARY TABLE temp_symmetry (addr1 int, addr2 int);
+
+-- find symmetrical rows
+INSERT INTO temp_symmetry
+SELECT tmp1.addr1, tmp1.addr2
+FROM tempRelations tmp1
+INNER JOIN tempRelations tmp2
+ON tmp1.addr1 = tmp2.addr2 
+AND tmp1.addr2 = tmp2.addr1
+AND tmp1.addr1 > tmp1.addr2;
+
+-- clean up symmetrical rows
+DELETE 
+FROM tempRelations
+WHERE EXISTS (SELECT * FROM temp_symmetry WHERE tempRelations.addr1 = temp_symmetry.addr1 AND tempRelations.addr2 = temp_symmetry.addr2);
+
+INSERT INTO addressRelations
+SELECT addr1, addr2
+FROM tempRelations;
+
+DROP TABLE IF EXISTS temp_symmetry;
+DROP TABLE IF EXISTS tempRelations;