Databases
StackOverflow2013
Postsdbo
POLINQ MySQL Group by Year, Month, Day select Year, Month, Day, Count
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POLINQ MySQL Group by Year, Month, Day select Year, Month, Day, Count
    primarykey
    data
    text
    <pre><code> var res = from r in db.myTable group r by new { Year = r.DateVal.Year, Month = r.DateVal.Month, Day = r.DateVal.Day } into g let Count = g.Count() select new { Year = g.Key.Year, Month = g.Key.Month, Day = g.Key.Day, Count = Count }; </code></pre> <p>Doesn't work. </p> <p>Excerpt from Inner Exception:</p> <pre><code> InnerException: MySql.Data.MySqlClient.MySqlException HResult=-2147467259 Message=Unknown column 'GroupBy1.K1' in 'field list' </code></pre> <p>The query generates the following SQL:</p> <pre><code>SELECT 1 AS `C1`, `GroupBy1`.`K1` AS `C2`, `GroupBy1`.`K2` AS `C3`, `GroupBy1`.`K3` AS `C4`, `GroupBy1`.`A1` AS `C5` FROM (SELECT COUNT(1) AS `A1` FROM `myTable` AS `Extent1` GROUP BY YEAR(`Extent1`.`DateVal`), MONTH(`Extent1`.`DateVal`), DAY(`Extent1`.`DateVal`)) AS `GroupBy1` </code></pre> <hr> <p>**</p> <h2>Linq Query as suggested by Zach:</h2> <p>**</p> <pre><code> var test = from r in db.myTable group r by new { Year = r.DateCol.Year, Month = r.DateCol.Month, Day = r.DateCol.Day } into grp select new { Year = grp.Key.Year, Month = grp.Key.Month, Day = grp.Key.Day, Count = grp.Count() }; try { var test2 = test.ToList(); } catch (Exception err) { } </code></pre> <p>Generated SQL:</p> <pre><code> SELECT 1 AS `C1`, `GroupBy1`.`K1` AS `C2`, `GroupBy1`.`K2` AS `C3`, `GroupBy1`.`K3` AS `C4`, `GroupBy1`.`A1` AS `C5` FROM (SELECT COUNT(1) AS `A1` FROM `myTable` AS `Extent1` GROUP BY YEAR(`Extent1`.`DateCol`), MONTH(`Extent1`.`DateCol`), DAY(`Extent1`.`DateCol`)) AS `GroupBy1` </code></pre> <p>Exception caught:</p> <pre><code>System.Data.EntityCommandExecutionException was caught HResult=-2146232004 Message=An error occurred while executing the command definition. See the inner exception for details. Source=System.Data.Entity StackTrace: at System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) at System.Data.Objects.Internal.ObjectQueryExecutionPlan.Execute[TResultType](ObjectContext context, ObjectParameterCollection parameterValues) at System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) at System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable&lt;T&gt;.GetEnumerator() at System.Data.Entity.Internal.Linq.InternalQuery`1.GetEnumerator() at System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.Generic.IEnumerable&lt;TResult&gt;.GetEnumerator() at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source) at myNamespace._Default.fillChart(String username, Int32 tzClient) in e:\...[Path on my harddrive]..\Default.aspx.cs:line 102 InnerException: MySql.Data.MySqlClient.MySqlException HResult=-2147467259 Message=Unknown column 'GroupBy1.K1' in 'field list' Source=MySql.Data ErrorCode=-2147467259 Number=1054 StackTrace: at MySql.Data.MySqlClient.MySqlStream.ReadPacket() at MySql.Data.MySqlClient.NativeDriver.GetResult(Int32&amp; affectedRow, Int64&amp; insertedId) at MySql.Data.MySqlClient.Driver.GetResult(Int32 statementId, Int32&amp; affectedRows, Int64&amp; insertedId) at MySql.Data.MySqlClient.Driver.NextResult(Int32 statementId, Boolean force) at MySql.Data.MySqlClient.MySqlDataReader.NextResult() at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) at MySql.Data.Entity.EFMySqlCommand.ExecuteDbDataReader(CommandBehavior behavior) at System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) at System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) InnerException: </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USFaizan Kazi
    1. USFaizan Kazi
    plurals
    1. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POLINQ MySQL Group by Year, Month, Day select Year, Month, Day, Count
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POLINQ MySQL Group by Year, Month, Day select Year, Month, Day, Count
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POLINQ MySQL Group by Year, Month, Day select Year, Month, Day, Count
      1. This table or related slice is empty.
      1. VTUpMod
    1. COLooks buggy, `K1`, `K2`, and `K3` should be in the SELECT clause of the subquery.
      singulars
      1. POLINQ MySQL Group by Year, Month, Day select Year, Month, Day, Count
      1. USGert Arnold
    2. CO[This](http://stackoverflow.com/q/15117391/861716) might be interesting for you. Esp. [the comment](http://stackoverflow.com/questions/15117391/mysql-entity-framework-with-distinct#comment21302403_15117391).
      singulars
      1. POLINQ MySQL Group by Year, Month, Day select Year, Month, Day, Count
      1. USGert Arnold
    3. COI quite agree that they should be in the select clause of the subquery.
      singulars
      1. POLINQ MySQL Group by Year, Month, Day select Year, Month, Day, Count
      1. USFaizan Kazi
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload