Docs/dbms er model and sql

app/sem4/dbms/[chapter]/page.tsx

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+import Link from "next/link";
+import { Ch0Content } from "../content/chapter0";
+import { Ch1Content } from "../content/chapter1";
+ import { Ch2Content } from "../content/chapter2";
+ import { Ch3Content } from "../content/chapter3";
+// import { Ch4Content } from "../content/chapter4";
+// import { Ch5Content } from "../content/chapter5";
+// import { Ch6Content } from "../content/chapter6";
+// import { Ch7Content } from "../content/chapter7";
+// import { Ch8Content } from "../content/chapter8";
+
+import { ArrowBigLeft, ArrowBigRight } from "lucide-react";
+import { Righteous } from "next/font/google";
+
+const righteous = Righteous({
+  subsets: ["latin"],
+  weight: "400",
+  variable: "--font-righteous",
+});
+
+const chapters = [
+  { id: "ch0", title: "Course Outline", component: Ch0Content },
+  { id: "ch1", title: "Introduction to Databases", component: Ch1Content },
+   { id: "ch2", title: "Entity-Relationship Model", component: Ch2Content },
+   { id: "ch3", title: "Relational Model and SQL", component: Ch3Content },
+  // { id: "ch4", title: "Normalization", component: Ch4Content },
+  // { id: "ch5", title: "Transactions and Concurrency Control", component: Ch5Content },
+  // { id: "ch6", title: "Indexing and Hashing", component: Ch6Content },
+  // { id: "ch7", title: "Query Processing and Optimization", component: Ch7Content },
+  // { id: "ch8", title: "Recovery and Security", component: Ch8Content },
+];
+
+type ChapterProps = {
+  params: { chapter: string };
+};
+
+export default function ChapterPage({ params }: ChapterProps) {
+  const currentIndex = chapters.findIndex((c) => c.id === params.chapter);
+  const chapter = chapters[currentIndex];
+
+  if (!chapter) {
+    return <h1 className="text-2xl font-bold">Chapter not found</h1>;
+  }
+
+  const ChapterComponent = chapter.component;
+  const prevChapter = currentIndex > 0 ? chapters[currentIndex - 1] : null;
+  const nextChapter = currentIndex < chapters.length - 1 ? chapters[currentIndex + 1] : null;
+
+  return (
+    <div className="flex flex-col bg-[#1B0D00] min-h-full p-2 pt-6 text-[#e2d1c1]">
+      <div className="flex-1">
+        <h1 className={`text-4xl font-bold ${righteous.className} mb-2`}>
+          Database Management Systems
+        </h1>
+
+        <p className={`text-2xl mt-[-8] ${righteous.className}`}>
+          {chapter.title}
+        </p>
+
+        <div className="flex justify-between mt-3">
+          {prevChapter ? (
+            <Link
+              href={`/sem4/dbms/${prevChapter.id}`}
+              className="px-4 py-1 text-2xl flex items-center justify-center bg-[#e2d1c1] text-[#1b0d00] rounded hover:bg-[#ac9e91] transition"
+              style={{ fontFamily: "Rockwell, Serif, serif" }}
+            >
+              <ArrowBigLeft className="inline-block mr-1" />
+              Previous
+            </Link>
+          ) : <div />}
+
+          {nextChapter ? (
+            <Link
+              href={`/sem4/dbms/${nextChapter.id}`}
+              className="px-4 py-1 text-2xl flex items-center justify-center bg-[#e2d1c1] text-[#1b0d00] rounded hover:bg-[#ac9e91] transition"
+              style={{ fontFamily: "Rockwell, Serif, serif" }}
+            >
+              Next
+              <ArrowBigRight className="inline-block ml-1" />
+            </Link>
+          ) : <div />}
+        </div>
+
+        <hr className="my-6 border-t-3" />
+
+        <ChapterComponent />
+      </div>
+
+      <div className="flex justify-between my-8">
+        {prevChapter ? (
+          <Link
+            href={`/sem4/dbms/${prevChapter.id}`}
+            className="px-4 py-2 bg-[#e2d1c1] text-xl flex items-center justify-center text-[#1b0d00] rounded hover:bg-[#ac9e91] transition"
+            style={{ fontFamily: "Rockwell, Serif, serif" }}
+          >
+            <ArrowBigLeft className="inline-block mr-1" />
+            {prevChapter.title}
+          </Link>
+        ) : <div />}
+
+        {nextChapter ? (
+          <Link
+            href={`/sem4/dbms/${nextChapter.id}`}
+            className="px-4 py-2 bg-[#e2d1c1] text-xl flex items-center justify-center text-[#1b0d00] rounded hover:bg-[#ac9e91] transition"
+            style={{ fontFamily: "Rockwell, Serif, serif" }}
+          >
+            {nextChapter.title}
+            <ArrowBigRight className="inline-block ml-1" />
+          </Link>
+        ) : <div />}
+      </div>
+    </div>
+  );
+}

app/sem4/dbms/components/sidebar.tsx

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+"use client";
+import { Righteous } from "next/font/google";
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { useState } from "react";
+
+const righteous = Righteous({
+  subsets: ["latin"],
+  weight: "400",
+  variable: "--font-righteous",
+});
+
+export default function Sidebar() {
+  const pathname = usePathname();
+  const [open, setOpen] = useState(true);
+
+  const chapters = [
+    { id: "ch0", title: "Course Outline" },
+    { id: "ch1", title: "Introduction to Databases" },
+     { id: "ch2", title: "Entity-Relationship Model" },
+     { id: "ch3", title: "Relational Model and SQL" },
+    // { id: "ch4", title: "Normalization" },
+    // { id: "ch5", title: "Transactions and Concurrency Control" },
+    // { id: "ch6", title: "Indexing and Hashing" },
+    // { id: "ch7", title: "Query Processing and Optimization" },
+    // { id: "ch8", title: "Recovery and Security" },
+  ];
+
+  return (
+    <div className="flex relative">
+      <aside
+        className={`h-[100vh] sticky top-0 bg-[#fae8d7] text-[#1B0D00] p-0 flex flex-col transition-all duration-300 ${
+          open ? "w-64" : "w-0 overflow-hidden"
+        }`}
+      >
+        <h2
+          className="flex items-center text-2xl font-normal pt-3 pl-3 mb-2 bg-[#cebb9c] text-[#1B0D00] pb-2 border-b-4 border-[#1B0D00]"
+          style={{ fontFamily: "Rockwell, Serif, serif" }}
+        >
+          Chapters
+        </h2>
+
+        <ul className="flex-1 overflow-y-auto space-y-0">
+          {chapters.map((ch) => {
+            const active = pathname === `/sem4/dbms/${ch.id}`;
+            return (
+              <li key={ch.id}>
+                <Link
+                  href={`/sem4/dbms/${ch.id}`}
+                  className={`block px-3 py-2 text-xl transition ${
+                    active ? "bg-[#fccc7e]" : "hover:bg-[#ffdda7af]"
+                  } ${righteous.className}`}
+                >
+                  {ch.title}
+                </Link>
+              </li>
+            );
+          })}
+        </ul>
+      </aside>
+
+      <button
+        onClick={() => setOpen(!open)}
+        className="toggle-sidebar sticky top-[10%] left-full bg-[#ffdda7d0] h-[85vh] w-[50px] text-[#1B0D00] text-center font-semibold text-2xl border-l-4 rounded-r-2xl border-[#1B0D00] flex items-center justify-center transition-all duration-300"
+        style={{ fontFamily: "Rockwell, Serif, serif" }}
+      >
+        <p className="leading-5">
+          C<br />H<br />A<br />P<br />T<br />E<br />R<br />S
+        </p>
+      </button>
+    </div>
+  );
+}

app/sem4/dbms/content/chapter0.tsx

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+export const Ch0Content = () => {
+  return (
+    <div className="course-content">
+      <p className="p-text">
+        Welcome to <span className="font-semibold">Database Management Systems</span> —
+        a core course designed to help you understand how data is organized, stored,
+        retrieved, and managed efficiently. This course covers relational models, SQL,
+        normalization, transactions, indexing, and more.
+      </p>
+
+      <hr className="my-6 border-[#c7a669] opacity-40" />
+
+      <section>
+        <h3 className="section-heading">
+          Module I: <span className="section-subheading">Introduction to Databases</span>
+        </h3>
+        <ul className="section-list">
+          <li>What is a database and why we need it</li>
+          <li>File system vs database approach</li>
+          <li>Advantages of DBMS over file systems</li>
+          <li>Types of databases: relational, hierarchical, network, object-oriented</li>
+          <li>Database users: end users, application programmers, DBA</li>
+          <li>DBMS architecture: 1-tier, 2-tier, 3-tier</li>
+        </ul>
+      </section>
+
+      <hr className="my-6 border-[#c7a669] opacity-40" />
+
+      <section>
+        <h3 className="section-heading">
+          Module II: <span className="section-subheading">Entity-Relationship Model</span>
+        </h3>
+        <ul className="section-list">
+          <li>Entities, attributes, and relationships</li>
+          <li>Types of attributes: simple, composite, multivalued, derived</li>
+          <li>Cardinality: one-to-one, one-to-many, many-to-many</li>
+          <li>Participation constraints: total and partial</li>
+          <li>ER diagram notation and conventions</li>
+          <li>Extended ER features: specialization, generalization, aggregation</li>
+        </ul>
+      </section>
+
+      <hr className="my-6 border-[#c7a669] opacity-40" />
+
+      <section>
+        <h3 className="section-heading">
+          Module III: <span className="section-subheading">Relational Model and SQL</span>
+        </h3>
+        <ul className="section-list">
+          <li>Relational model: tables, tuples, attributes, domains</li>
+          <li>Keys: primary, candidate, foreign, super key</li>
+          <li>Relational algebra operations</li>
+          <li>SQL basics: DDL, DML, DCL, TCL</li>
+          <li>Joins: inner, outer, natural, cross</li>
+          <li>Subqueries, views, and aggregation functions</li>
+        </ul>
+      </section>
+
+      <hr className="my-6 border-[#c7a669] opacity-40" />
+
+      <section>
+        <h3 className="section-heading">
+          Module IV: <span className="section-subheading">Normalization</span>
+        </h3>
+        <ul className="section-list">
+          <li>Functional dependencies and their types</li>
+          <li>Anomalies: insertion, deletion, update</li>
+          <li>Normal forms: 1NF, 2NF, 3NF, BCNF</li>
+          <li>Decomposition: lossless join and dependency preservation</li>
+          <li>Multivalued dependencies and 4NF</li>
+          <li>Practical approach to normalization</li>
+        </ul>
+      </section>
+
+      <hr className="my-6 border-[#c7a669] opacity-40" />
+
+      <section>
+        <h3 className="section-heading">
+          Module V: <span className="section-subheading">Transactions and Concurrency Control</span>
+        </h3>
+        <ul className="section-list">
+          <li>Transaction concept and ACID properties</li>
+          <li>Transaction states: active, partially committed, committed, failed, aborted</li>
+          <li>Concurrency problems: lost update, dirty read, unrepeatable read</li>
+          <li>Concurrency control techniques: locking, timestamps</li>
+          <li>Two-phase locking protocol</li>
+          <li>Deadlock detection and recovery</li>
+        </ul>
+      </section>
+
+      <hr className="my-6 border-[#c7a669] opacity-40" />
+
+      <section>
+        <h3 className="section-heading">
+          Module VI: <span className="section-subheading">Indexing and Hashing</span>
+        </h3>
+        <ul className="section-list">
+          <li>Basic concepts of indexing</li>
+          <li>Dense and sparse indexes</li>
+          <li>B-tree and B+ tree indexing</li>
+          <li>Hashing techniques: static and dynamic</li>
+          <li>Comparison of indexing vs hashing</li>
+          <li>When to use which technique</li>
+        </ul>
+      </section>
+
+      <hr className="my-6 border-[#c7a669] opacity-40" />
+
+      <section>
+        <h3 className="section-heading">
+          Module VII: <span className="section-subheading">Query Processing and Optimization</span>
+        </h3>
+        <ul className="section-list">
+          <li>Steps in query processing</li>
+          <li>Query cost estimation</li>
+          <li>Equivalence of relational expressions</li>
+          <li>Query optimization techniques</li>
+          <li>Nested loop joins and merge joins</li>
+          <li>Query execution plans</li>
+        </ul>
+      </section>
+
+      <hr className="my-6 border-[#c7a669] opacity-40" />
+
+      <section>
+        <h3 className="section-heading">
+          Module VIII: <span className="section-subheading">Recovery and Security</span>
+        </h3>
+        <ul className="section-list">
+          <li>Types of failures: transaction, system, media</li>
+          <li>Recovery techniques: log-based, shadow paging</li>
+          <li>Checkpoints and their role in recovery</li>
+          <li>Database security concepts</li>
+          <li>Authorization and authentication</li>
+          <li>SQL injection and prevention</li>
+        </ul>
+      </section>
+
+      <hr className="my-6 border-[#c7a669] opacity-40" />
+
+      <p className="p-text">
+        By the end of this course, you will understand how to design databases,
+        write efficient SQL queries, normalize data, manage transactions, and
+        handle indexing and recovery — providing a strong foundation for
+        real-world database development and system design.
+      </p>
+    </div>
+  );
+};