[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"academy-blogs-en-1-1-all-go-database-management-all--*":3,"academy-blog-translations-wcu7266ebz4zrmr":79},{"data":4,"page":67,"perPage":67,"totalItems":67,"totalPages":67},[5],{"alt":6,"collectionId":7,"collectionName":8,"content":9,"cover_image":10,"cover_image_path":11,"created":12,"created_by":13,"expand":14,"id":73,"keywords":74,"locale":49,"published_at":75,"scheduled_at":13,"school_blog":71,"short_description":76,"slug":77,"status":69,"title":6,"updated":78,"updated_by":13,"views":72},"EP.15 Go with Database - Manage Data Like a Pro!","sclblg987654321","school_blog_translations","\u003Cp>\u003Cspan style=\"font-size:20px;\">\u003Cstrong>Go with Database - Manage Data Like a Pro!\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cp>Do you want to store user or product information in your program? Today, we will learn how to connect to and manage data in a database using Go in a simple and systematic way.\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size:18px;\">\u003Cstrong>Connecting to a Database with database\u002Fsql\u003C\u002Fstrong>\u003C\u002Fspan>\u003Cbr>In Go, we have the database\u002Fsql package that allows us to easily connect to and manage data in a database, such as connecting to PostgreSQL, MySQL, or SQLite.\u003C\u002Fp>\u003Cp>Example of connecting to PostgreSQL:\u003C\u002Fp>\u003Cp>In this example:\u003Cbr>sql.Open(\"postgres\", connStr) is used to open a connection to the PostgreSQL database.\u003Cbr>defer db.Close() is used to close the connection when the program finishes running.\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">package main\r\n\r\nimport (\r\n    \"database\u002Fsql\"\r\n    \"fmt\"\r\n    _ \"github.com\u002Flib\u002Fpq\" \u002F\u002F ใช้ _ เพื่อ import driver ของ PostgreSQL\r\n)\r\n\r\nfunc main() {\r\n    connStr := \"postgres:\u002F\u002Fuser:password@localhost\u002Fdbname?sslmode=disable\"\r\n    db, err := sql.Open(\"postgres\", connStr)\r\n    if err != nil {\r\n        fmt.Println(\"Error connecting to the database:\", err)\r\n        return\r\n    }\r\n    defer db.Close() \u002F\u002F ปิดการเชื่อมต่อเมื่อใช้งานเสร็จ\r\n\r\n    fmt.Println(\"Connected to the database!\")\r\n}\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp> \u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size:18px;\">\u003Cstrong>Creating a Table in the Database\u003C\u002Fstrong>\u003C\u002Fspan>\u003Cbr>Once the connection is successful, let's create a table to store data, such as a user table.\u003C\u002Fp>\u003Cp>Example of creating a table:\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">_, err := db.Exec(`\r\n    CREATE TABLE IF NOT EXISTS users (\r\n        id SERIAL PRIMARY KEY,\r\n        name VARCHAR(100),\r\n        age INT\r\n    )\r\n`)\r\nif err != nil {\r\n    fmt.Println(\"Error creating table:\", err)\r\n    return\r\n}\r\nfmt.Println(\"Table created successfully!\")\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp> \u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size:18px;\">\u003Cstrong>Inserting Data into the Database\u003C\u002Fstrong>\u003C\u002Fspan>\u003Cbr>Once we have a table, we can add data to the database, such as adding new user information.\u003C\u002Fp>\u003Cp>Example of inserting data:\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">name := \"Alice\"\r\nage := 25\r\n_, err = db.Exec(\"INSERT INTO users (name, age) VALUES ($1, $2)\", name, age)\r\nif err != nil {\r\n    fmt.Println(\"Error inserting data:\", err)\r\n    return\r\n}\r\nfmt.Println(\"Data inserted successfully!\")\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp> \u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size:18px;\">\u003Cstrong>Retrieving Data from the Database\u003C\u002Fstrong>\u003C\u002Fspan>\u003Cbr>We can retrieve data from the table for use, such as fetching all user information.\u003C\u002Fp>\u003Cp>Example of retrieving data:\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">rows, err := db.Query(\"SELECT id, name, age FROM users\")\r\nif err != nil {\r\n    fmt.Println(\"Error retrieving data:\", err)\r\n    return\r\n}\r\ndefer rows.Close()\r\n\r\nfor rows.Next() {\r\n    var id int\r\n    var name string\r\n    var age int\r\n    err = rows.Scan(&id, &name, &age)\r\n    if err != nil {\r\n        fmt.Println(\"Error scanning data:\", err)\r\n        return\r\n    }\r\n    fmt.Printf(\"ID: %d, Name: %s, Age: %d\\n\", id, name, age)\r\n}\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp> \u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size:18px;\">\u003Cstrong>Updating Data in the Database\u003C\u002Fstrong>\u003C\u002Fspan>\u003Cbr>When data changes, we can update existing information, such as updating a user's age.\u003C\u002Fp>\u003Cp>Example of updating data:\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">newAge := 26\r\n_, err = db.Exec(\"UPDATE users SET age = $1 WHERE name = $2\", newAge, \"Alice\")\r\nif err != nil {\r\n    fmt.Println(\"Error updating data:\", err)\r\n    return\r\n}\r\nfmt.Println(\"Data updated successfully!\")\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp> \u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size:18px;\">\u003Cstrong>Deleting Data from the Database\u003C\u002Fstrong>\u003C\u002Fspan>\u003Cbr>If data is no longer needed, we can delete it from the database.\u003C\u002Fp>\u003Cp>Example of deleting data:\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext\">_, err = db.Exec(\"DELETE FROM users WHERE name = $1\", \"Alice\")\r\nif err != nil {\r\n    fmt.Println(\"Error deleting data:\", err)\r\n    return\r\n}\r\nfmt.Println(\"Data deleted successfully!\")\r\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp> \u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size:18px;\">\u003Cstrong>Summary\u003C\u002Fstrong>\u003C\u002Fspan>\u003C\u002Fp>\u003Cul>\u003Cli>Use sql.Open to connect to the database.\u003C\u002Fli>\u003Cli>Use Exec for INSERT, UPDATE, DELETE commands.\u003C\u002Fli>\u003Cli>Use Query and Scan for retrieving data (SELECT).\u003C\u002Fli>\u003Cli>Close the connection with defer db.Close().\u003C\u002Fli>\u003C\u002Ful>\u003Cp> \u003C\u002Fp>\u003Cp>\u003Cspan style=\"font-size:18px;\">\u003Cstrong>Fun Activity\u003C\u002Fstrong>\u003C\u002Fspan>\u003Cbr>Try creating a product table that stores product names and prices. Then, write code to add product information, retrieve all products, update prices, and delete unwanted products!\u003C\u002Fp>","34_11zon_pb9wij7k5w.webp","https:\u002F\u002Ftwsme-r2.tumwebsme.com\u002Fsclblg987654321\u002F65vor3hney88r55\u002F34_11zon_pb9wij7k5w.webp","2026-03-04 08:51:45.069Z","",{"keywords":15,"locale":43,"school_blog":53},[16,23,28,33,38],{"collectionId":17,"collectionName":18,"created":19,"created_by":13,"id":20,"name":21,"updated":22,"updated_by":13},"sclkey987654321","school_keywords","2026-03-04 08:31:54.955Z","264sfjffyhspetq","programmers","2026-04-10 16:07:47.221Z",{"collectionId":17,"collectionName":18,"created":24,"created_by":13,"id":25,"name":26,"updated":27,"updated_by":13},"2026-03-04 08:51:44.745Z","o0306xug3p6zzye","CRUD","2026-04-10 16:14:39.476Z",{"collectionId":17,"collectionName":18,"created":29,"created_by":13,"id":30,"name":31,"updated":32,"updated_by":13},"2026-03-04 08:45:08.210Z","kf4t7456pu8udiy","Database Connection","2026-04-10 16:12:54.691Z",{"collectionId":17,"collectionName":18,"created":34,"created_by":13,"id":35,"name":36,"updated":37,"updated_by":13},"2026-03-04 08:45:09.036Z","l1oi3jpol4c4ezx","Database","2026-04-10 16:12:54.847Z",{"collectionId":17,"collectionName":18,"created":39,"created_by":13,"id":40,"name":41,"updated":42,"updated_by":13},"2026-03-04 08:20:11.547Z","ey3puyme01a9bsw","Go","2026-04-10 16:07:25.893Z",{"code":44,"collectionId":45,"collectionName":46,"created":47,"flag":48,"id":49,"is_default":50,"label":51,"updated":52},"en","pbc_1989393366","locales","2026-01-22 11:00:02.726Z","twemoji:flag-united-states","qv9c1llfov2d88z",false,"English","2026-04-10 15:42:46.825Z",{"category":54,"collectionId":55,"collectionName":56,"expand":57,"id":71,"views":72},"wqxt7ag2gn7xcmk","pbc_2105096300","school_blogs",{"category":58},{"blogIds":59,"collectionId":60,"collectionName":61,"created":62,"created_by":13,"id":54,"image":63,"image_alt":13,"image_path":64,"label":65,"name":66,"priority":67,"publish_at":68,"scheduled_at":13,"status":69,"updated":70,"updated_by":13},[],"sclcatblg987654321","school_category_blogs","2026-03-04 08:33:53.210Z","59ty92ns80w_15oc1implw.png","https:\u002F\u002Ftwsme-r2.tumwebsme.com\u002Fsclcatblg987654321\u002Fwqxt7ag2gn7xcmk\u002F59ty92ns80w_15oc1implw.png",{"en":66,"th":66},"Golang The Series",1,"2026-03-16 04:39:38.440Z","published","2026-04-25 02:32:15.470Z","wcu7266ebz4zrmr",211,"65vor3hney88r55",[20,25,30,35,40],"2025-01-27 04:36:23.027Z","Learn how to connect to a database in Go and how to create, read, update, and delete data effectively.","go-database-management","2026-04-22 07:11:49.331Z",{"en":77}]