如何使用Golang在SQL中执行IN查找？

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)
}

原文地址：https://www.jb51.cc/go/187067.html