使用LINQ的select子句选择需要的列,并使用LINQ的聚合函数Max计算每个分组中的最大值。 下面是一个示例代码,演示如何使用LINQ将分组从SQL转换为LINQ查询: 代码语言:txt 复制var query = from data in dbContext.TableName group data by data.GroupColumn into groupedData select new { GroupColumn = groupedData.Key...
I have created this code in php to connect to mysql server, and it keeps giving me error: is there something wrong my sql code? thanks! $query_maxid = "SELECT * FROM tblhonorees WHERE ID = MAX(ID)" Navigate: Previous Message• Next Message Options: Reply• Quote Subject Views...
Query OK,1row affected (0.06sec) mysql>insertintomaxtestvalues(32,193); Query OK,1row affected (0.06sec) mysql>insertintomaxtestvalues(23,199); Query OK,1row affected (0.06sec) mysql>select*frommaxtest;+---+---+|age|hight|+---+---+|30|180||30|173||32|193||23|199|+---+--...
1.使用SqlQuery在已知的实体上执行SQL查询语句 using (var context = new MyDBContext()) { var posts = context.Posts.SqlQuery("SELECT * FROM dbo.Posts").ToList(); } 这里的Posts必须是程序项目或者引用中已声明的实体类,ToList()是必须的,否则SQL查询将不会被执行。
对于选择Max和Min的操作,可以使用以下SQL语句: 代码语言:txt 复制 SELECT MAX(column_name) AS max_value, MIN(column_name) AS min_value FROM table_name; 其中,column_name是要选择的列名,table_name是要查询的表名。 这个查询语句将返回该列中的最大值和最小值,并分别使用别名max_value和min_...
Note: The MIN and MAX functions can also be used on text columns, to find the highest or lowest value in alphabetical order. If you don't find what you are looking for. Pleaseclick hereto submit your query, our experts will reply soon. ...
I have this TSQL I need to convert Lambda expression: SELECT max(WorkPackage.ID) FROM Package WHERE (Package.WPTitle LIKE 'TWF fac%') AND (Package.Status = 'Baseline') group by WBSID) I have this so far, but it doesn't use the max() in my TSQL: var…
<ROOT xmlns:sql="urn:schemas-microsoft-com:xml-sql"> <sql:xpath-query mapping-schema="maxDepth.xml"> /Emp </sql:xpath-query> </ROOT> 为映射架构 (maxDepth.xml) 指定的目录路径是相对于模板保存目录的相对路径。 也可以指定绝对路径,例如: ...
The OVER clause in the following query is DeptName. The query returns EmpName, DeptName, and the highest salary over the window - DeptName. U-SQL 复制 @result = SELECT EmpName, DeptName, MAX(Salary) OVER(PARTITION BY DeptName) AS HighestSalaryByDept FROM @employees; OUTPUT @result TO...
Lei, The proper way of getting the greatest ID number would be $query_maxid = "SELECT MAX(ID) from tblhonorees"; Best regards Leo Subject Views Written By Posted MAX in sql, is there a problem accept Max in mysql 4735 lei millman ...