亚音速2.2 SqlQuery类与内部连接和在哪里

Question

我试图使用SqlQuery类功能，下面的SQL转换成亚音速语法：

SELECT DISTINCT * FROM FamilyMemberTeamRole FMTR 
INNER JOIN TeamRole TR ON FMTR.TeamRoleId = TR.TeamRoleId 
INNER JOIN Team T ON T.TeamId = TR.TeamId 
LEFT JOIN FamilyMemberClassHistory FMCH ON FMCH.FamilyMemberClassHistoryId = FMTR.FamilyMemberClassHistoryId 
LEFT JOIN CBSClass CG ON CG.CBSClassGroupId = FMCH.CBSClassGroupId 
LEFT JOIN CBSClassSession CS ON CG.CBSClassGroupId = CS.CBSClassGroupId 
AND (CS.ClassStartDate <= FMTR.EndDate or FMTR.EndDate IS NULL) 
AND (CS.IsHistory = 0 OR CS.IsHistory = NULL) 
WHERE FMTR.FamilyMemberId = @FamilyMemberId 

我想出了这个然而什么是错的我的最后一个左语法因为我不知道如何将SqlQuery中的值与自己进行比较。

SqlQuery sql = new Select().From(FamilyMemberTeamRole.Schema.TableName) 
.InnerJoin(TeamRole.TeamRoleIdColumn, FamilyMemberTeamRole.TeamRoleIdColumn) 
.InnerJoin(Team.TeamIdColumn, TeamRole.TeamIdColumn) 
.LeftOuterJoin(FamilyMemberClassHistory.FamilyMemberClassHistoryIdColumn, FamilyMemberTeamRole.FamilyMemberClassHistoryIdColumn) 
.LeftOuterJoin(CBSClass.CBSClassGroupIdColumn, FamilyMemberClassHistory.CBSClassGroupIdColumn) 
.LeftOuterJoin(CBSClassSession.CBSClassGroupIdColumn, CBSClass.CBSClassGroupIdColumn) 
.AndExpression(CBSClassSession.Columns.ClassStartDate).IsLessThanOrEqualTo(FamilyMemberTeamRole.Columns.EndDate) 
.Or(FamilyMemberTeamRole.Columns.EndDate).IsNull().CloseExpression() 
.AndExpression(CBSClassSession.Columns.IsHistory).IsEqualTo(false) 
.Or(CBSClassSession.Columns.IsHistory).IsNull().CloseExpression() 
.Where(FamilyMemberTeamRole.Columns.FamilyMemberId).IsEqualTo(this.FamilyMemberId) 
.Distinct(); 

Answer 1

您可以随时查询什么亚音速你与BuildSqlStatement()方法生成：

SqlQuery query = DB.Select().From<Product>(); 
String output = query.BuildSqlStatemtent(); 

但我想我知道是什么问题：SubSonic2加入方法不支持加入多列据我所知：subsonic 2 join on multiple columns

所以你基本上你有两个选择。

一）做一个 “逗号连接”

SELECT * FROM table1 
INNER JOIN table2 ON table1.id = table2.table1_id 

相同低于此查询，但更易读

SELECT * FROM table1, table2 
WHERE table1.id = table2.table1_id 

至少这是对MySQL

编辑真：赢得与亚音速工作，因为我想出了我的问题（但已忘记）

http://www.mysqlperformanceblog.com/2010/04/14/is-there-a-performance-difference-between-join-and-where/

b）使用亚音速的后门来执行普通SQL的InlineQuery。

private class Process 
    { 
     public Int64 Id { get; set; } 
     public string User { get; set; } 
     public string Host { get; set; } 
     public string Db { get; set; } 
     public string Command { get; set; } 
     public string State { get; set; } 
     public string Info { get; set; } 
    } 

    var result = DB.Query().ExecuteTypedList<Process>("SHOW FULL PROCESSLIST");