如何使用Golang在SQL中执行IN查找?

前端之家收集整理的这篇文章主要介绍了如何使用Golang在SQL中执行IN查找?前端之家小编觉得挺不错的,现在分享给大家,也给大家做个参考。
Go在这个SQL查询中为第二个参数做了什么。
我试图在postgres中使用IN查找。
stmt,err := db.Prepare("SELECT * FROM awesome_table WHERE id= $1 AND other_field IN $2")
rows,err := stmt.Query(10,???)

我真正想要的

SELECT * FROM awesome_table WHERE id=10 AND other_field IN (this,that);
查询只需要varargs来替换sql中的params
所以,在你的例子中,你只会做
rows,err := stmt.Query(10)

说,这和你的第二个例子是动态的,那么你会这样做

stmt,err := db.Prepare("SELECT * FROM awesome_table WHERE id=$1 AND other_field IN ($2,$3)")
rows,"this","that")

如果您有“IN”部分的变量args,可以执行(play)

package main

import "fmt"
import "strings"

func main() {
    stuff := []interface{}{"this","that","otherthing"}
    sql := "select * from foo where id=? and name in (?" + strings.Repeat(",?",len(stuff)-1) + ")"
    fmt.Println("sql:",sql)
    args := []interface{}{10}
    args = append(args,stuff...)
    fakeExec(args...)
    // This also works,but I think it's harder for folks to read
    //fakeExec(append([]interface{}{10},stuff...)...)
}

func fakeExec(args ...interface{}) {
    fmt.Println("Got:",args)
}
原文链接:https://www.f2er.com/go/187067.html

猜你在找的Go相关文章