node 对mysql操作

其实都是mysql语句的操作，就可以

删除一条或者多条数据

用到的语句

sql = DELETE FROM t_leave_info WHERE leave_info_id IN (640,634,633);

实例

 removeId (sort, arr) {
      // console.log(arr.join()arr.join())
      let str = arr.join()
      let delesql = 'delete from '+sort+' where id in ('+str+')'
      // console.log(delesql)
      return new Promise((resolve,reject) => {
        pool.query(delesql, (err, res) => {
          if(err) {
            throw err
          }
          resolve(res)
        })
      })

参考：
https://codeday.me/bug/20171012/83136.html
https://www.jianshu.com/p/ebcba9d9a7ed