From f28d1e68690569fbc169b4983e17e1d651c2b1a3 Mon Sep 17 00:00:00 2001
From: Matthew Huntington <matt.huntington@gmail.com>
Date: Thu, 19 Oct 2023 22:42:52 -0400
Subject: [PATCH] transactions

---
 SQL/lessons/sql_3.md | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

diff --git a/SQL/lessons/sql_3.md b/SQL/lessons/sql_3.md
index d35cb93..d2aca79 100644
--- a/SQL/lessons/sql_3.md
+++ b/SQL/lessons/sql_3.md
@@ -180,9 +180,39 @@ CREATE TRIGGER archive_person
 DELETE FROM people WHERE id = 1;
 ```
 
-
 ### Transactions
 
+```sql
+BEGIN;
+
+INSERT INTO people (name) VALUES ('matt');
+
+SELECT * FROM people;
+
+-- start a different session and run SELECT * FROM people;
+-- Switch back to original session
+
+COMMIT;
+
+-- in other session run SELECT * FROM people;
+```
+
+OR
+
+```sql
+BEGIN;
+
+INSERT INTO people (name) VALUES ('matt');
+
+SELECT * FROM people;
+
+asdfasdfasdfasdfasdfasdf;
+
+ROLLBACK;
+
+SELECT * FROM people;
+```
+
 ### Locks
 
 ### Privileges