Go中SQLite数据库的操作

package main

import (
    "database/sql"
    "fmt"
    "log"
    "os"

    _ "github.com/mattn/go-sqlite3"
)

func main() {
    os.Remove("./products.db")
    db, err := sql.Open("sqlite3", "./products.db")
    if err != nil {
        log.Fatal(err)
    }
    sql := `create table t_products(id integer not null primary key, name text, price float)`
    _, err = db.Exec(sql)
    defer db.Close()
    if err != nil {
        log.Fatal(err)
        return
    }
    // 插入的事务开始
    tx, err := db.Begin()
    if err != nil {
        log.Fatal(err)
        return
    }
    stmt, err := tx.Prepare("insert into t_products(id, name, price) values(?,?,?)")
    if err != nil {
        log.Fatal(err)
        return
    }
    defer stmt.Close()
    for i := 0; i < 10; i++ {
        _, err = stmt.Exec(i+1, fmt.Sprintf("产品%d", i+1), float64(i+1)*54.8)
        if err != nil {
            log.Fatal(err)
            return
        }
    }
    tx.Commit() // 提交

    // 查询
    rows, err := db.Query("select id, name, price from t_products")
    if err != nil {
        log.Fatal(err)
        return
    }
    defer rows.Close()
    for rows.Next() {
        var id int
        var name string
        var price float64
        err = rows.Scan(&id, &name, &price)
        if err != nil {
            log.Fatal(err)
            return
        }
        priceStr := fmt.Sprintf("%.2f", price)
        fmt.Println(id, name, priceStr)
    }

    stmt, _ = db.Prepare("select name,price from t_products where id=?")
    defer stmt.Close()
    var name string
    var price float64
    stmt.QueryRow("6").Scan(&name, &price)
    priceStr := fmt.Sprintf("%.2f", price)
    fmt.Println("--------------")
    fmt.Println(name, priceStr)

    // 删除
    stmt, _ = db.Prepare("delete from t_products where id=?")
    stmt.Exec(9)
}