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Yii2: How to add two fields and NULLS LAST in orderby() of Find() using mysql


Yii2: How to add two fields and NULLS LAST in orderby() of Find() using mysql

By : Success
Date : October 16 2020, 08:10 PM
I hope this helps . Trying to do something similar to this question, but need to sort NULLS LAST for MySQL , Use \yii\db\Expression
code :
MODEL::find()
    ->where('1')
    ->orderBy(
        [
            new \yii\db\Expression('col_1 IS NULL ASC, col_1 desc')
        ]
    )
    ->all();


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MySQL Orderby a number, Nulls last

MySQL Orderby a number, Nulls last


By : Jovanka Djordjevic
Date : March 29 2020, 07:55 AM
Any of those help MySQL has an undocumented syntax to sort nulls last. Place a minus sign (-) before the column name and switch the ASC to DESC:
code :
SELECT * FROM tablename WHERE visible=1 ORDER BY -position DESC, id DESC
Find fields that aren't used (have all nulls)

Find fields that aren't used (have all nulls)


By : Y.V.Vijaya Lakshmi
Date : March 29 2020, 07:55 AM
it helps some times I've inherited a legacy database, and many, many fields are no longer being used. I can tell by querying on the last couple of years and seeing which fields are null, to at least get a baseline for where I might look.
code :
DECLARE @table NVARCHAR(512);
SET @table = N'dbo.tablename';

DECLARE @sql NVARCHAR(MAX);

SELECT @sql = N'';

SELECT @sql = @sql + QUOTENAME(name) 
     + ' = SUM(CASE WHEN ' + QUOTENAME(name) + ' IS NULL THEN 1 ELSE 0 END),'
  FROM sys.columns
  WHERE object_id = OBJECT_ID(@table)
  AND is_nullable = 1;

SELECT @sql = 'SELECT ' + @sql + ' Total_Count = COUNT(*)
  FROM ' + @table + ';';

EXEC sp_executesql @sql;
yii2 ActiveRecord Find OrderBy with calculation

yii2 ActiveRecord Find OrderBy with calculation


By : Naresh Yemulwar
Date : March 29 2020, 07:55 AM
it should still fix some issue Trying to fetch a description from my database. The query returns the result but I would like to order the result to only show the one with the highest vote. , You should simply try :
code :
$description = UnitDescription::find()
    ->where(['id_unit' => $model->id])
    ->orderBy(['(upvoted - downvoted)' => SORT_DESC])
    ->one();
Yii2: How to add two fields in orderby() of Find()

Yii2: How to add two fields in orderby() of Find()


By : lin liu
Date : March 29 2020, 07:55 AM
around this issue According to the documentation:
code :
$model::find()->orderBy([
  'id_date' => SORT_DESC,
  'item_no'=>SORT_ASC
]);
Yii2: orderby in find()->where() method

Yii2: orderby in find()->where() method


By : Ashok Guduru
Date : March 29 2020, 07:55 AM
will be helpful for those in need I'm trying to make a query to the database to retrieve a list of favorite products by category , try to use where in condition
code :
$products = Product::find()
     ->where(['in','category',$categoryids])
     ->orderBy('category DESC')
     ->all();
$products = Product::find()
    ->where(['in','category',$categoryids])
    ->joinWith(['categorys' => function ($query) {
        $query->orderBy('shortcode');
    }])
    ->all();
public function getCategorys()
{
    return $this->hasOne(Category::className(), ['id' => 'category']);
}
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