MySQL子数据行有多个父键，需要构建选择查询

Question

父表（动物）

• ID ：
• name:
• 性别：[Male=0，Female=1，other= -1，DESEXED - Female=2，DESEXED - Male =3]

交易表

• 交易ID
• Animal_Father_ID
• Animal_Mother_ID
• Animal_Child_ID
• 日期
• 状态

样本交易

现在使用Transaction表我需要加入父表，需要获得带有Animal名称的摘要;

我如何使用select语句加入父表（动物）并获得上述结果？

（之前的开发人员创建了这个结构，它有近20GB的数据。现在我无法更改表结构）

Answer 1

SELECT TOP 1
   t.ID,
   p.Name as 'Name of Father',
   m.Name as 'Name of Mother',
   c.Name as 'Name if Child',
   t.Date,
   t.Status
FROM Transactions t
JOIN Animals m ON m.ID = t.Animal_Mother_ID
JOIN Animals p ON p.ID = t.Animal_Father_ID
JOIN Animals c ON c.ID = t.Animal_Child_ID

Answer 2

我正在讨论koryakinp的答案，但在case语句中加入以转换状态的值：

SELECT 
   t.Transaction_ID,
   p.Name as 'Name of Father',
   m.Name as 'Name of Mother',
   c.Name as 'Name if Child',
   t.Date,
   CASE 
    WHEN t.Status = 1 THEN 'Active'
    WHEN t.Status = 2 THEN 'Value2'
    WHEN t.Status = 3 THEN 'Value3'
    WHEN t.Status = 4 THEN 'Value4'
    WHEN t.Status = 5 THEN 'Value5'
    ELSE t.Status
   END as Status
FROM transaction t
JOIN parent m ON m.ID = t.Animal_Mother_ID
JOIN parent p ON p.ID = t.Animal_Father_ID
JOIN parent c ON c.ID = t.Animal_Child_ID

没有案例陈述：

SELECT 
   t.Transaction_ID,
   p.Name as 'Name of Father',
   m.Name as 'Name of Mother',
   c.Name as 'Name if Child',
   t.Date
FROM transaction t
JOIN parent m ON m.ID = t.Animal_Mother_ID
JOIN parent p ON p.ID = t.Animal_Father_ID
JOIN parent c ON c.ID = t.Animal_Child_ID