Ask a question about a mongo array query?

talbe name: server_groups, for example, has the following two pieces of data, and the field iplist is an array. There are multiple ranges stored in it, and I want to check whether a number falls within this range. If I query 150 and it falls into the first array of the first record, then I return the first record. My query 750 falls in the second record, in the second array. How to write this query statement? Ask for advice

{
    name:"111" ,
    iplist:[
         {
           "start"  : 100,
           "end"  : 200
         },
        {
           "strat"  : 500,
           "end"  : 700
        }
     ]
}
{
    name:"111" ,
    iplist:[
         {
           "start"  : 300,
           "end"  : 400
        },
        {
           "strat"  : 800,
           "end"  : 1000
        }
    ]
}
Jul.16,2021

first you need an appropriate index:

db.foo.createIndex({
  "iplist.start": 1,
  "iplist.end": 1
});

the secondary index helps you find documents that match the criteria, but array elements that do not. If you need this element, use projection to find the desired element:

db.foo.find({
  iplist: {
    $elemMatch: {
      start: {
        $lt: 150
      },
      end: {
        $gt: 150
      }
    }
  }
}, {
  "iplist.$": 1
});
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3eeb1-2c449.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3eeb1-2c449.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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