示例群聊数据库查询

上一次修改主题： 2011-01-27

本节包含群聊数据库的示例查询。

使用以下示例可获得某个日期后多数活动聊天室的列表。

SELECT nodeName as ChatRoom, COUNT(*) as ChatMessages
  FROM tblChat, tblNode
  WHERE channelId = nodeID AND dbo.fnTicksToDate(chatDate) > '1/1/2011'
  GROUP BY nodeName
  ORDER BY ChatMessages DESC

使用以下示例可获得某个日期后多数活动用户的列表。

SELECT prinName as Name, count(*) as ChatMessages
  FROM tblChat, tblPrincipal
  WHERE prinId = userId AND dbo.fnTicksToDate(chatDate) > '1/1/2011'
  GROUP BY prinName
  ORDER BY ChatMessages DESC

使用以下示例可获得曾经发送其中包含“Hello World”的消息的每位用户的列表。

SELECT nodeName as ChatRoom, prinName as Name, content as Message
  FROM tblChat, tblNode, tblPrincipal
  WHERE channelId = nodeID AND userId = prinID AND content like '%Hello World%'

使用以下示例可获得某个主体的组成员身份的列表。

SELECT prinName as Name    
  FROM tblPrincipalAffiliations as pa, tblPrincipal
  where principalID = 7 and affiliationID = prinID

使用以下示例可获得用户 Jane Dow 属于其直接成员的每个聊天室的列表。

SELECT DISTINCT nodeName as ChatRoom, prinName as Name          
  FROM tblPrincipalRole, tblPrincipal, tblNode
  WHERE  prinRoleNodeID = nodeID AND prinRolePrinID = prinID AND prinName = 'Jane Dow'

使用以下示例可获得用户已接收的邀请的列表。

SELECT prinName
      ,nodeName
      ,invID   
      ,createdOn
  FROM tblPrincipalInvites as inv, tblPrincipal as p, tblNode as n
  where inv.prinID = 5 AND inv.prinID = p.prinID and inv.nodeID = n.nodeID
  ORDER BY invID DESC