Sql 如何组合两个查询？

我有以下疑问：

问题1：

Select * from T10,T11,T12,T13,T14 
where T10.C0 = T11.C0 and T11.C1 = T12.C0 
and T12.C1 = T13.C0 and T13.C1 = T14.C0; 

问题2：

Select * from T20,T21,T22,T23,T24 
where T20.C0 = T21.C0 and T21.C1 = T22.C0 
and T22.C1 = T23.C0 and T23.C1 = T24.C0;

如何组合这两个查询以显示这些表的所有值？我希望联接在

T10.C1=T20.C1

上

在尝试联合时，我得到一个关于列数不相同的警告，这是真的，这些表是不同的

---

联合

Select * from 
"ProductConfig","Board","PcbBuild","Model","TcssCalib" 
where "Model"."idModel" = "PcbBuild"."Model" and "Board"."PcbBuild" = "PcbBuild"."idPcbBuild" 
and "Board"."idBoard" = "TcssCalib"."Board" and "ProductConfig"."TcssCalib" = "TcssCalib"."idTcssCalib"

union

Select * from"ProductBuild","TxResultsLink","TxResults","DspValues" where "ProductBuild"."idProductBuild"
 = "TxResultsLink"."ProductBuild" and "TxResults"."idTxResults" = "TxResultsLink"."TxResults" 
and "TxResults"."DspValues" = "DspValues"."idDspValues";

在这里，我希望ProductBuild.Productconfig与Productconfig.idProductConfig合并

给出一个错误：

[Err]错误：每个联合查询必须具有相同的列数

---

当我尝试

internaljoin

时，我在

internal

有没有办法将这两个查询连接在一起？

这就是您想要的：

Select * from T10,T11,T12,T13,T14,T20,T21,T22,T23,T24
where T10.C0 = T11.C0 and T11.C1 = T12.C0 
and T12.C1 = T13.C0 and T13.C1 = T14.C0
and T10.C1 = T20.C1 and T20.C0 = T21.C0 and T21.C1 = T22.C0 
and T22.C1 = T23.C0 and T23.C1 = T24.C0;

---

另一种更可读的方法是：

select * from T10
  inner join T11 on T10.C0 = T11.C0
  inner join T12 on T11.C1 = T12.C0 
  inner join T13 on T12.C1 = T13.C0 
  inner join T14 on T13.C1 = T14.C0
  inner join T20 on T10.C1 = T20.C1
  inner join T21 on T20.C0 = T21.C0
  inner join T22 on T21.C1 = T22.C0 
  inner join T23 on T22.C1 = T23.C0
  inner join T24 on T23.C1 = T24.C0;

---

要得到

UNION

，表中的列数必须相同，并且来自相同/可转换的数据类型

Select * from T10,T11,T12,T13,T14 
where T10.C0 = T11.C0 and T11.C1 = T12.C0 
and T12.C1 = T13.C0 and T13.C1 = T14.C0

UNION

Select * from T20,T21,T22,T23,T24 
where T20.C0 = T21.C0 and T21.C1 = T22.C0 
and T22.C1 = T23.C0 and T23.C1 = T24.C0;

---

这就是你想要的：

Select * from T10,T11,T12,T13,T14,T20,T21,T22,T23,T24
where T10.C0 = T11.C0 and T11.C1 = T12.C0 
and T12.C1 = T13.C0 and T13.C1 = T14.C0
and T10.C1 = T20.C1 and T20.C0 = T21.C0 and T21.C1 = T22.C0 
and T22.C1 = T23.C0 and T23.C1 = T24.C0;

---

另一种更具可读性的说法是：

select * from T10
  inner join T11 on T10.C0 = T11.C0
  inner join T12 on T11.C1 = T12.C0 
  inner join T13 on T12.C1 = T13.C0 
  inner join T14 on T13.C1 = T14.C0
  inner join T20 on T10.C1 = T20.C1
  inner join T21 on T20.C0 = T21.C0
  inner join T22 on T21.C1 = T22.C0 
  inner join T23 on T22.C1 = T23.C0
  inner join T24 on T23.C1 = T24.C0;

---

要得到

UNION

，表中的列数必须相同，并且来自相同/可转换的数据类型

Select * from T10,T11,T12,T13,T14 
where T10.C0 = T11.C0 and T11.C1 = T12.C0 
and T12.C1 = T13.C0 and T13.C1 = T14.C0

UNION

Select * from T20,T21,T22,T23,T24 
where T20.C0 = T21.C0 and T21.C1 = T22.C0 
and T22.C1 = T23.C0 and T23.C1 = T24.C0;

---

---

加入是最好的选择。发布您的加入查询代码，以便我们可以帮助调试它。此外，我希望这些是模糊的列名。是的，这些是“组合”的表名和列名（否则它们将变得不可读，我认为）连接是一种方法。发布您的加入查询代码，以便我们可以帮助调试它。此外，我希望这些是模糊的列名。是的，这些是“组合”的表名和列名（否则它们将变得不可读），这是我想要的，但我已经完成了我的2个查询（由C#构建）我想知道我是否可以轻松地加入这些查询。正确的方法是使用我指定的查询之一。我尝试了你的联合方法，但在我的案例中出现了一个错误（请参阅我编辑的问题）@Moonlight如何将一个查询与另一个查询连接？ProductBuild.ProductConfig与ProductConfig.IDProductConfig连接这是我想要的，但我已经完成了两个查询（由C#构建）我想知道是否可以轻松地加入这些查询。正确的方法是使用我指定的查询之一。我尝试了您的联合方法，但在我的案例中出现了一个错误（请参见我编辑的问题）@Moonlight如何将一个查询与另一个查询连接？ProductBuild.ProductConfig与ProductConfig.idProductConfig连接