From 9e5c3e6c188cc0145cd4c058ca3421ad7f057958 Mon Sep 17 00:00:00 2001
From: deeplusplus <46547062+deeplusplus@users.noreply.github.com>
Date: Sat, 26 Aug 2023 22:55:31 -0400
Subject: [PATCH 1/2] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index d03ad99..439d564 100644
--- a/README.md
+++ b/README.md
@@ -100,7 +100,7 @@ If you're replicating SQL databases, whether MySQL, Postgres, or SQL Server, [ch
 ## Level 6
   
 - Concepts
-  - database cracking: *explanation needed*
+  - database cracking: https://stratos.seas.harvard.edu/files/IKM_CIDR07.pdf
   - learned indexes: *explanation needed*
   - XTID exhaustion: *explanation needed*
   - Worst Case Optimal Join: *explanation needed*

From 7157a4f037be7489e42d8857b8ae4554867e29a0 Mon Sep 17 00:00:00 2001
From: deeplusplus <46547062+deeplusplus@users.noreply.github.com>
Date: Sat, 26 Aug 2023 23:11:39 -0400
Subject: [PATCH 2/2] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 439d564..7859924 100644
--- a/README.md
+++ b/README.md
@@ -103,7 +103,7 @@ If you're replicating SQL databases, whether MySQL, Postgres, or SQL Server, [ch
   - database cracking: https://stratos.seas.harvard.edu/files/IKM_CIDR07.pdf
   - learned indexes: *explanation needed*
   - XTID exhaustion: *explanation needed*
-  - Worst Case Optimal Join: *explanation needed*
+  - Worst Case Optimal Join: https://justinjaffray.com/a-gentle-ish-introduction-to-worst-case-optimal-joins/
   - Volcano model: *explanation needed*
 - Battle Scars
   - Vectorized doesn't mean SIMD: *explanation needed*