From 9b71470501c76451754e51e4257ccfd63550d2fb Mon Sep 17 00:00:00 2001
From: Ryan <ryan@alien.gov>
Date: Wed, 14 Jun 2023 20:11:53 +0800
Subject: [PATCH] Auto saved by Logseq

---
 pages/总复习2023t1.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index fabd4c2..a6116dd 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -1019,6 +1019,16 @@
 							- Physical database design
 					- LATER SQL
 						- purpose and importance of SQL.
+							- SQL is a transform-oriented language with 2
+							  major components: #flashcard
+								- A DDL for defining database structure.
+									- Create table
+									- Drop table
+								- A DML for retrieving and updating data.
+									- Insert
+									- Delete
+									- update
+									- Select
 						- retrieve data from database and formulate queries using SELECT and
 							- Use compound WHERE conditions.
 							- Sort query results using ORDER BY.