{"id":1523,"date":"2026-02-04T01:01:48","date_gmt":"2026-02-04T01:01:48","guid":{"rendered":"https:\/\/gurututorku.com\/blog\/?p=1523"},"modified":"2026-02-04T01:01:48","modified_gmt":"2026-02-04T01:01:48","slug":"belajar-database-lengkap-bagian-3-query-database","status":"publish","type":"post","link":"https:\/\/gurututorku.com\/blog\/belajar-database-lengkap-bagian-3-query-database\/","title":{"rendered":"Belajar Database Lengkap &#8211; Bagian #3 (Query Database)"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Praktek 1 \u2013 Membuat Database<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Membuat Database<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE DATABASE sekolah;\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Menggunakan Database<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>USE sekolah;\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Praktek 2 \u2013 Membuat Tabel (DDL)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Apa itu DDL?<\/h3>\n\n\n\n<p><strong>DDL (Data Definition Language)<\/strong> digunakan untuk:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>CREATE<\/li>\n\n\n\n<li>ALTER<\/li>\n\n\n\n<li>DROP<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Membuat Tabel <code>kelas<\/code><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE kelas (\n    id_kelas INT AUTO_INCREMENT PRIMARY KEY,\n    nama_kelas VARCHAR(50)\n);\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Membuat Tabel <code>siswa<\/code><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE siswa (\n    id_siswa INT AUTO_INCREMENT PRIMARY KEY,\n    nama VARCHAR(100),\n    jenis_kelamin ENUM('L','P'),\n    alamat TEXT,\n    id_kelas INT\n);\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Praktek 3 \u2013 DML (Insert, Update, Delete)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Apa itu DML?<\/h3>\n\n\n\n<p><strong>DML (Data Manipulation Language)<\/strong> digunakan untuk:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>INSERT<\/li>\n\n\n\n<li>SELECT<\/li>\n\n\n\n<li>UPDATE<\/li>\n\n\n\n<li>DELETE<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Insert Data ke Tabel <code>kelas<\/code><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>INSERT INTO kelas (nama_kelas) VALUES\n('X RPL'),\n('XI RPL'),\n('XII RPL');\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Insert Data ke Tabel <code>siswa<\/code><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>INSERT INTO siswa (nama, jenis_kelamin, alamat, id_kelas) VALUES\n('Andi', 'L', 'Bandung', 1),\n('Siti', 'P', 'Jakarta', 2),\n('Budi', 'L', 'Surabaya', 1);\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Menampilkan Data (SELECT)<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM siswa;\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Update Data<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>UPDATE siswa \nSET alamat = 'Yogyakarta'\nWHERE id_siswa = 1;\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Delete Data<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>DELETE FROM siswa \nWHERE id_siswa = 3;\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Relasi Antar Tabel<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Apa itu Relasi?<\/h3>\n\n\n\n<p>Relasi adalah <strong>hubungan antar tabel<\/strong> menggunakan:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Primary Key<\/li>\n\n\n\n<li>Foreign Key<\/li>\n<\/ul>\n\n\n\n<p>&#x1f4cc; Contoh relasi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1 kelas \u2192 banyak siswa<br>(<strong>One to Many<\/strong>)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Menambahkan Foreign Key<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE siswa\nADD CONSTRAINT fk_kelas\nFOREIGN KEY (id_kelas) REFERENCES kelas(id_kelas);\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Praktek JOIN Table<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; Apa itu JOIN?<\/h3>\n\n\n\n<p><strong>JOIN<\/strong> digunakan untuk menggabungkan data dari dua tabel atau lebih.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; INNER JOIN (Paling sering digunakan)<\/h3>\n\n\n\n<p>Menampilkan data siswa + nama kelas<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT \n    siswa.id_siswa,\n    siswa.nama,\n    siswa.jenis_kelamin,\n    kelas.nama_kelas\nFROM siswa\nJOIN kelas ON siswa.id_kelas = kelas.id_kelas;\n<\/code><\/pre>\n\n\n\n<p>&#x1f4cc; Hasil:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Andi  | L | X RPL\nSiti  | P | XI RPL\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f539; LEFT JOIN<\/h3>\n\n\n\n<p>Menampilkan semua siswa meskipun belum punya kelas<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT siswa.nama, kelas.nama_kelas\nFROM siswa\nLEFT JOIN kelas ON siswa.id_kelas = kelas.id_kelas;\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Studi Kasus Mini<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">&#x1f3af; Kasus:<\/h3>\n\n\n\n<p>Buat database <strong>Perpustakaan<\/strong><\/p>\n\n\n\n<p>Tabel:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>buku (id_buku, judul, pengarang)<\/li>\n\n\n\n<li>anggota (id_anggota, nama)<\/li>\n\n\n\n<li>peminjaman (id_pinjam, id_buku, id_anggota, tanggal)<\/li>\n<\/ul>\n\n\n\n<p>&#x1f4cc; Relasi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>satu anggota \u2192 banyak peminjaman<\/li>\n\n\n\n<li>satu buku \u2192 bisa dipinjam berkali-kali<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Praktek 1 \u2013 Membuat Database &#x1f539; Membuat Database &#x1f539; Menggunakan Database Praktek 2 \u2013 Membuat Tabel (DDL) &#x1f539; Apa itu DDL? DDL (Data Definition Language) digunakan untuk: &#x1f539; Membuat Tabel kelas &#x1f539; Membuat Tabel siswa Praktek 3 \u2013 DML (Insert, Update, Delete) &#x1f539; Apa itu DML? DML (Data Manipulation Language) digunakan untuk: &#x1f539; Insert Data [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":905,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53,68],"tags":[54,55,66,57,58,67,65],"class_list":["post-1523","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-database","category-lainnya","tag-basis-data","tag-database","tag-database-server","tag-mysql","tag-sql","tag-tipe-data-mysql","tag-xampp"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Belajar Database Lengkap - Bagian #3 (Query Database) - Gurututorku<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gurututorku.com\/blog\/belajar-database-lengkap-bagian-3-query-database\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Belajar Database Lengkap - Bagian #3 (Query Database) - Gurututorku\" \/>\n<meta property=\"og:description\" content=\"Praktek 1 \u2013 Membuat Database &#x1f539; Membuat Database &#x1f539; Menggunakan Database Praktek 2 \u2013 Membuat Tabel (DDL) &#x1f539; Apa itu DDL? 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