如何在MySQL中設計一個「視圖」來獲得我期待的結果？

Question

我已經成功在我的MySQL數據庫中創建一些數據的視圖，如下圖所示：

mysql> CREATE VIEW phonelist AS 
    -> SELECT parent.parentID AS ParentID, 
    -> ParentPerson.firstName AS ParentFirstName, 
    -> ParentPerson.lastName AS ParentLastName, 
    -> ChildPerson.firstName AS PlayerFirstName, 
    -> ChildPerson.lastName AS PlayerLastName, 
    -> GuardianHomePhone.homeNumber AS GuardianHomePhone 
    -> FROM parent 
    -> JOIN player ON (parent.parentID IN (player.motherID, player.fatherID)) 
    -> JOIN person AS ParentPerson ON (ParentPerson.personID = parent.parentID) 
    -> JOIN person AS ChildPerson ON (ChildPerson.personID = player.playerID) 
    -> JOIN addressDetails AS GuardianHomePhone ON (GuardianHomePhone.personID = parent.parentID); 

Query OK, 0 rows affected (0.00 sec) 

mysql> select * from phonelist; 

+----------+-----------------+----------------+-----------------+----------------+-------------------+ 
| ParentID | ParentFirstName | ParentLastName | PlayerFirstName | PlayerLastName | GuardianHomePhone | 
+----------+-----------------+----------------+-----------------+----------------+-------------------+ 
|  8 | Gregory   | Peck   | Michael   | Peck   | 034871234   | 
|  9 | Laura   | Peck   | Michael   | Peck   | 034871234   | 
|  10 | Martha   | Petersen  | Matt   | Petersen  | 034724321   | 
|  10 | Martha   | Petersen  | Christopher  | Petersen  | 034724321   | 
|  11 | Chris   | Michaels  | Richard   | Michaels  | 034791212   | 
|  11 | Chris   | Michaels  | Shaun   | Michaels  | 034791212   | 
|  12 | Nadine   | Michaels  | Richard   | Michaels  | 034791212   | 
|  12 | Nadine   | Michaels  | Shaun   | Michaels  | 034791212   | 
|  13 | Barry   | Dackers  | Harry   | Dackers  | 034871996   | 
|  14 | Kevin   | Mitchell  | Daniel   | Mitchell  | 034742886   | 
|  15 | Rebecca   | Mitchell  | Daniel   | Mitchell  | 034742886   | 
+----------+-----------------+----------------+-----------------+----------------+-------------------+ 
11 rows in set (0.00 sec) 

mysql> 

創建這個觀點是一個挑戰，但下面的說明是我無法瀏覽周圍什麼：

我還需要添加每個球員在這個視圖中的球隊。因爲讓團隊的名字匹配需要將4個表連在一起，所以我無法將事物合併在一起。我設法建立一個滿足玩家下方隊一個單獨的查詢：

mysql> select person.firstName, person.lastName, team.teamName 
    -> from person join player on person.personID = player.playerID 
    -> join teamAllocation on person.personID = teamAllocation.playerID 
    -> join team on teamAllocation.teamID = team.teamID; 

+-------------+----------+------------+ 
| firstName | lastName | teamName | 
+-------------+----------+------------+ 
| Michael  | Peck  | U10 Red | 
| Christopher | Petersen | U10 Red | 
| Richard  | Michaels | U11 Orange | 
| Shaun  | Michaels | U9 Yellow | 
| Matt  | Petersen | U11 Orange | 
| Harry  | Dackers | U9 Yellow | 
| Daniel  | Mitchell | U9 Yellow | 
+-------------+----------+------------+ 
7 rows in set (0.00 sec) 

mysql> 

我在我的腦海可視化的結果是這樣的：

+----------+-----------------+----------------+-----------------+----------------+----------------+-------------------+ 
| ParentID | ParentFirstName | ParentLastName | PlayerFirstName | TeamName  | PlayerLastName | GuardianHomePhone | 
+----------+-----------------+----------------+-----------------+----------------+----------------+-------------------+ 
|  8 | Gregory   | Peck   | Michael   | U10 Red  | Peck   | 034871234   | 
|  9 | Laura   | Peck   | Michael   | U10 Red  | Peck   | 034871234   | 
|  10 | Martha   | Petersen  | Matt   | U11 Orange  | Petersen  | 034724321   | 
|  10 | Martha   | Petersen  | Christopher  | U10 Red  | Petersen  | 034724321   | 
|  11 | Chris   | Michaels  | Richard   | U11 Orange  | Michaels  | 034791212   | 
|  11 | Chris   | Michaels  | Shaun   | U9 Yellow  | Michaels  | 034791212   | 
|  12 | Nadine   | Michaels  | Richard   | U11 Orange  | Michaels  | 034791212   | 
|  12 | Nadine   | Michaels  | Shaun   | U9 Yellow  | Michaels  | 034791212   | 
|  13 | Barry   | Dackers  | Harry   | U9 Yellow  | Dackers  | 034871996   | 
|  14 | Kevin   | Mitchell  | Daniel   | U9 Yellow  | Mitchell  | 034742886   | 
|  15 | Rebecca   | Mitchell  | Daniel   | U9 Yellow  | Mitchell  | 034742886   | 
+----------+-----------------+----------------+-----------------+----------------+----------------+-------------------+ 

如果有人可以幫助我在此我想非常感謝。對於那些想要用數據測試查詢的人，我已經將模式（DDL）和數據（DML）腳本（放在一個「粘貼」中）放在http://pastebin.com/S4iJyJUh處。

此外，如果有人認爲有更好的辦法我可以做的觀點，讓我知道。

Answer 1

你幾乎在那裏，你只需要結合這兩個查詢。

CREATE VIEW phonelistWithTeams AS 
SELECT parent.parentID AS ParentID, 
    ParentPerson.firstName AS ParentFirstName, 
    ParentPerson.lastName AS ParentLastName, 
    ChildPerson.firstName AS PlayerFirstName, 
    ChildPerson.lastName AS PlayerLastName, 
    team.teamName AS TeamName, 
    GuardianHomePhone.homeNumber AS GuardianHomePhone 
FROM parent 
    JOIN player ON (parent.parentID IN (player.motherID, player.fatherID)) 
    JOIN person AS ParentPerson ON (ParentPerson.personID = parent.parentID) 
    JOIN person AS ChildPerson ON (ChildPerson.personID = player.playerID) 
    JOIN addressDetails AS GuardianHomePhone ON (GuardianHomePhone.personID = parent.parentID) 
    JOIN teamAllocation ON (ChildPerson.personID = teamAllocation.playerID) 
    JOIN team ON (teamAllocation.teamID = team.teamID); 

運行SELECT * FROM phonelistWithTeams會給你

+----------+-----------------+----------------+-----------------+----------------+------------+-------------------+ 
| ParentID | ParentFirstName | ParentLastName | PlayerFirstName | PlayerLastName | TeamName | GuardianHomePhone | 
+----------+-----------------+----------------+-----------------+----------------+------------+-------------------+ 
|  8 | Gregory   | Peck   | Michael   | Peck   | U10 Red | 034871234   | 
|  9 | Laura   | Peck   | Michael   | Peck   | U10 Red | 034871234   | 
|  10 | Martha   | Petersen  | Matt   | Petersen  | U11 Orange | 034724321   | 
|  10 | Martha   | Petersen  | Christopher  | Petersen  | U10 Red | 034724321   | 
|  11 | Chris   | Michaels  | Richard   | Michaels  | U11 Orange | 034791212   | 
|  11 | Chris   | Michaels  | Shaun   | Michaels  | U9 Yellow | 034791212   | 
|  12 | Nadine   | Michaels  | Richard   | Michaels  | U11 Orange | 034791212   | 
|  12 | Nadine   | Michaels  | Shaun   | Michaels  | U9 Yellow | 034791212   | 
|  13 | Barry   | Dackers  | Harry   | Dackers  | U9 Yellow | 034871996   | 
|  14 | Kevin   | Mitchell  | Daniel   | Mitchell  | U9 Yellow | 034742886   | 
|  15 | Rebecca   | Mitchell  | Daniel   | Mitchell  | U9 Yellow | 034742886   | 
+----------+-----------------+----------------+-----------------+----------------+------------+-------------------+