mysql - PHP 批量插入的时候 判断数据表里面是否重复怎么优化

Question

场景：从第三方接口获取到数据 比如 获取到了 500 条，然后批量插入到表，但是要保证唯一。代码如果是这样的（name 字段有索引的情况下怎么才能最大化的优化），这样的结果是有500次的I/O 这个逻辑怎么优化最佳呢；这里还有个场景如果当这 500条插入成功后马上进行二次查询第三方接口然后再批量插入，主要是考虑到第二种情况:

$datas = [];
$Apps = new Apps();
foreach ($lists as $k=>$v){
    $name = $v['name'];
    $res = $Apps->where(['name' => $name])
        ->field('name')
        ->find();
    //如果没有记录
    if (empty($res)){
        $datas[] = ['name' => $name];
    }
}

if (empty($datas)){
    //批量插入
    $Apps->saveAll($datas);
}

Answer 1

Ensure that it is only processed in the database, just set it as unique.
This does not require PHP to process.

Answer 2

Set joint primary key

Answer 3

Add a unique index to fields that cannot be repeated

Answer 4

First add a unique index to the field, and then change the SQL to this, INSERT INTO xx (yy)VALUES(?) ON DUPLICATE KEY UPDATE yy=?
But when the unique key is repeated, update the field. You can also ignore the repetition. OK, do not modify INSERT IGNORE INTO