diff --git a/src/pages/sql/00-introduction.mdx b/src/pages/sql/00-introduction.mdx
deleted file mode 100644
index 68c99d8..0000000
--- a/src/pages/sql/00-introduction.mdx
+++ /dev/null
@@ -1,9 +0,0 @@
----
-layout: "@/layouts/MarkdownLayout.astro"
----
-
-import Toc from "../../components/Toc.astro";
-
-export const title = "SQLってなに？";
-
-# {title}
diff --git a/src/pages/sql/000-introduction.mdx b/src/pages/sql/000-introduction.mdx
new file mode 100644
index 0000000..68c99d8
--- /dev/null
+++ b/src/pages/sql/000-introduction.mdx
@@ -0,0 +1,9 @@
+---
+layout: "@/layouts/MarkdownLayout.astro"
+---
+
+import Toc from "../../components/Toc.astro";
+
+export const title = "SQLってなに？";
+
+# {title}
diff --git a/src/pages/sql/010-foundation.mdx b/src/pages/sql/010-foundation.mdx
index 916befb..c707b97 100644
--- a/src/pages/sql/010-foundation.mdx
+++ b/src/pages/sql/010-foundation.mdx
@@ -6,4 +6,54 @@
 
 # {title}
 
-このセクションはまだ何も書かれていません。
+## TOC
+
+`users`
+
+| 列名 | 型 |
+| :----- | :-- |
+| id | INT |
+| name | VARCHAR(100) |
+| address | VARCHAR(255) |
+
+<br />
+
+| id | name | address |
+| :-- | :---- | :------ |
+| 1 | 山田太郎 | 東京都千代田区 |
+
+`products`
+
+| 列名 | 型 |
+| :----- | :-- |
+| id | INT |
+| name | VARCHAR(100) |
+| price | DECIMAL(10,2) |
+| stock | INT |
+
+`orders`
+
+| 列名 | 型 |
+| :----- | :-- |
+| id | INT |
+| user_id | INT |
+| product_id | INT |
+| quantity | INT |
+
+## 型
+
+## SELECT
+
+### WHERE
+
+### JOIN
+
+### GROUP BY
+
+### ORDER BY
+
+## INSERT
+
+## UPDATE
+
+## DELETE