publicfunctiongetAverageUserRatingInPercentageAttribute(){return$this->feedback_count ?intval(($this->positive_feedback_count *100) /$this->feedback_count) :0; } I already tried this in SQL: User::withCount(['sellerFeedbacks as positive_feedback_count'=> function ($query) {$query->onlyPos...
查询构建器建立在Database Access Objects基础之上,可让你创建 程序化的、DBMS无关的SQL语句。相比于原生的SQL语句,查询构建器可以帮你 写出可读性更强的SQL相关的代码,并生成安全性更强的SQL语句。 使用查询构建器通常包含以下两个步骤: 创建一个yii\db\Query对象来代表一条 SELECT SQL 语句的不同子句(例如SELECT...
The join hint for the pair of tables might only restrict the selection of allowed join methods in the query hint. For more information, see Join hints. DISABLE_OPTIMIZED_PLAN_FORCING Applies to: SQL Server (Starting with SQL Server 2022 (16.x)) Disables Optimized plan forcing for...
Applies to:SQL ServerAzure SQL DatabaseAzure SQL Managed Instance Returns aggregate performance statistics for cached query plans in SQL Server. The view contains one row per query statement within the cached plan, and the lifetime of the rows are tied to the plan itself. When...
If you include row sums, the crosstab query has an additional row heading that uses the same field and function as the field value. Including a row sum inserts an additional column that summarizes the remaining columns. For example, if your crosstab query calculates ...
SQL Server versionExecution metricStatistic function SQL Server 2016 (13.x) CPU time, Duration, Execution count, Logical reads, Logical writes, Memory consumption, Physical reads, CLR time, Degree of parallelism (DOP), and Row count Average, Maximum, Minimum, Standard Deviation, Total SQ...
In this chapter from SQL in 24 Hours, Sams Teach Yourself, 6th Edition, you learn how to count values in columns, count rows of data in a table, get the maximum and minimum values for a column, figure the sum of the values in a column, and figure the average value for values in ...
I was trying to calculate GPA and Commulative GPA (CGPA) for this student and the formula of GPA is SUM(Honor)/SUM(CREDIT) and the formula of the CGPA is the Average of the SUM(Honor)/SUM(CREDIT) grouped by semester and I wrote the below query which is calculating the GPA correctly...
In addition to the methods covered here, this class contains methods for concatenating data sources, computing a single value from a data source, such as a sum, average, or other value. 重要 These samples use an System.Collections.Generic.IEnumerable<T> data source. Data sources based on ...
the full list of query methods supported by the .NET Runtime, see theSystem.Linq.EnumerableAPI documentation. In addition to the methods covered here, this class contains methods for concatenating data sources, computing a single value from a data source, such as a sum, average, or other ...