add sql example

.gitignore

@@ -1,3 +1,2 @@
 .idea
-build-errors.log
-main
+tmp

core/nkode/nkode_sqlite.go

@@ -1 +0,0 @@
-package nkode

core/sql-driver/sql_driver.go

@@ -0,0 +1,86 @@
+package sql_driver
+
+import (
+	"database/sql"
+	"fmt"
+	_ "github.com/mattn/go-sqlite3" // Import the SQLite3 driver
+	"log"
+)
+
+func InitTables() {
+	db, err := sql.Open("sqlite3", "./example.db")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	// Create a table
+	createTableSQL := `
+    CREATE TABLE IF NOT EXISTS users (
+        id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+        name TEXT,
+        age INTEGER
+    );
+    `
+	_, err = db.Exec(createTableSQL)
+	if err != nil {
+		log.Fatalf("Error creating table: %s", err)
+	}
+
+	// Insert data into the table
+	insertUserSQL := `INSERT INTO users (name, age) VALUES (?, ?)`
+	_, err = db.Exec(insertUserSQL, "Alice", 30)
+	if err != nil {
+		log.Fatalf("Error inserting data: %s", err)
+	}
+
+	_, err = db.Exec(insertUserSQL, "Bob", 25)
+	if err != nil {
+		log.Fatalf("Error inserting data: %s", err)
+	}
+
+	// Query the data
+	queryUserSQL := `SELECT id, name, age FROM users`
+	rows, err := db.Query(queryUserSQL)
+	if err != nil {
+		log.Fatalf("Error querying data: %s", err)
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		var id int
+		var name string
+		var age int
+		err = rows.Scan(&id, &name, &age)
+		if err != nil {
+			log.Fatalf("Error scanning data: %s", err)
+		}
+		fmt.Printf("User: ID=%d, Name=%s, Age=%d\n", id, name, age)
+	}
+
+	// Update data
+	updateUserSQL := `UPDATE users SET age = ? WHERE name = ?`
+	_, err = db.Exec(updateUserSQL, 35, "Alice")
+	if err != nil {
+		log.Fatalf("Error updating data: %s", err)
+	}
+
+	// Verify the update
+	fmt.Println("After update:")
+	rows, err = db.Query(queryUserSQL)
+	if err != nil {
+		log.Fatalf("Error querying data: %s", err)
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		var id int
+		var name string
+		var age int
+		err = rows.Scan(&id, &name, &age)
+		if err != nil {
+			log.Fatalf("Error scanning data: %s", err)
+		}
+		fmt.Printf("User: ID=%d, Name=%s, Age=%d\n", id, name, age)
+	}
+}

core/sql-driver/sql_driver_test.go

@@ -0,0 +1,7 @@
+package sql_driver
+
+import "testing"
+
+func TestInitTables(t *testing.T) {
+	InitTables()
+}

go.mod

@@ -3,13 +3,14 @@ module go-nkode
 go 1.19
 
 require (
+	github.com/google/uuid v1.6.0
+	github.com/mattn/go-sqlite3 v1.14.22
 	github.com/stretchr/testify v1.9.0
 	golang.org/x/crypto v0.26.0
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/google/uuid v1.6.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,9 +1,9 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/deckarep/golang-set/v2 v2.6.0 h1:XfcQbWM1LlMB8BsJ8N9vW5ehnnPVIw0je80NsVHagjM=
-github.com/deckarep/golang-set/v2 v2.6.0/go.mod h1:VAky9rY/yGXJOLEDv3OMci+7wtDpOF4IN+y82NBOac4=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
+github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=