Yii2.0数据库操作(1)

$post = new Post;
$post->name = 'yayue';
$post->age = 24;
$post->save();
$pk = $post->getPrimaryKey(); //返回主键id
//也可以这么写
$array = [
  'name' => 'yayue',
  'age' => 24,
];
$post->setAttributes($array);
$post->save();

//根据主键获取一条数据
$data= $post->findOne($pk);
$data= $post->findOne(['pk'=>1,'name'=>'yayue']);
$data= $post->find()->where(['id'=>$pk])->one();
//获取age=24多条数据
$data= $post->find()->where(['age'=>24])->all();
$data= $post->findAll(['name'=>'yayue','age'=>24]);

//获取age=24并且name=yayue多条数据
$data= $post->find()->where(['age'=>24])->andWhere(['name'=>'yayue'])->all();

//获取age=24或者name=yayue多条数据
$data= $post->find()->where(['age'=>24])->orWhere(['name'=>'yayue'])->all();

//获取指定字段name、age age=24多条数据
$data= $post->find()->select(['name','age'])->where(['age'=>24])->all();

//统计age=24数据
$data= $post->find()->where(['age'=>24])->cout();

//查询age最大的数据
$data= $post->find()->max('age');

//查询age最小的数据
$data= $post->find()->min('age');

//获取数据通过age排序
$data= $post->find()->orderBy('age desc')->all();

//获取age=24并且name=yayue多条数据
$data= $post->find()->where(['age'=>24])->andWhere(['name'=>'yayue'])->all();

//获取age=24或者name=yayue多条数据
$data= $post->find()->where(['age'=>24])->orWhere(['name'=>'yayue'])->all();

//获取指定字段name、age age=24多条数据
$data= $post->find()->select(['name','age'])->where(['age'=>24])->all();

//统计age=24数据
$data= $post->find()->where(['age'=>24])->cout();

//查询age最大的数据
$data= $post->find()->max('age');

//查询age最小的数据
$data= $post->find()->min('age');

//获取数据通过age排序
$data= $post->find()->orderBy('age desc')->all();

//获取age=24并且name=yayue多条数据
$data= $post->find()->where(['age'=>24])->andWhere(['name'=>'yayue'])->all();

//获取age=24或者name=yayue多条数据
$data= $post->find()->where(['age'=>24])->orWhere(['name'=>'yayue'])->all();

//获取指定字段name、age age=24多条数据
$data= $post->find()->select(['name','age'])->where(['age'=>24])->all();

//统计age=24数据
$data= $post->find()->where(['age'=>24])->count();

//查询age最大的数据
$d
4000
ata= $post->find()->max('age');

//查询age最小的数据
$data= $post->find()->min('age');

//获取数据通过age排序
$data= $post->find()->orderBy('age desc')->all();

//获取数据age>24
$data= $post->find()->where('age > :age',['age'=>24])->all();

//获取数据age=24 or age=25
$data = $post->find()->where(['or','age=24', 'age=25'])->all();

//其它where条件
// WHERE id=1 or id=2
where('id=1 or id=2');
// WHERE id=:id1 or id=:id2
where('id=:id1 or id=:id2', [':id1'=>1, ':id2'=>2]);
// WHERE id=1 OR id=2
where(['or', 'id=1', 'id=2']);
// WHERE id=1 AND (type=2 OR type=3)
where(['and', 'id=1', ['or', 'type=2', 'type=3']]);
// WHERE `id` IN (1, 2)
where(['in', 'id', [1, 2]]);
// WHERE `id` NOT IN (1, 2)
where(['not in', 'id', [1,2]]);
// WHERE `name` LIKE '%Qiang%'
where(['like', 'name', '%Qiang%']);
// WHERE `name` LIKE '%Qiang' AND `name` LIKE '%Xue'
where(['like', 'name', ['%Qiang', '%Xue']]);
// WHERE `name` LIKE '%Qiang' OR `name` LIKE '%Xue'
where(['or like', 'name', ['%Qiang', '%Xue']]);
// WHERE `name` NOT LIKE '%Qiang%'
where(['not like', 'name', '%Qiang%']);
// WHERE `name` NOT LIKE '%Qiang%' OR `name` NOT LIKE '%Xue%'
where(['or not like', 'name', ['%Qiang%', '%Xue%']]);