go mysql统计重复值

package main

import (
    "database/sql"
    "fmt"
    _ "github.com/go-sql-driver/mysql"
)

func main() {
    // 连接数据库
    db, err := sql.Open("mysql", "user:password@tcp(localhost:3306)/dbname")
    if err != nil {
        panic(err)
    }
    defer db.Close()

    // 查询重复值
    query := `
        SELECT name, COUNT(*) as count
        FROM users
        GROUP BY name
        HAVING count > 1
    `
    rows, err := db.Query(query)
    if err != nil {
        panic(err)
    }
    defer rows.Close()

    // 处理查询结果
    for rows.Next() {
        var name string
        var count int
        if err := rows.Scan(&name, &count); err != nil {
            panic(err)
        }
        fmt.Printf("Name: %s, Count: %d\n", name, count)
    }

    if err := rows.Err(); err != nil {
        panic(err)
    }
}