結合兩個查詢 - 如何？

Question

我有以下疑問：

查詢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; 

查詢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; 

我如何可以結合這2次的查詢，以顯示這些表的所有值？我想要加入T10.C1 = T20.C1。

當試圖union我得到一個關於不具有相同的列數，這是真正的警告，這些表是不一樣的

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工會

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"; 

在這裏，我想ProductBuild.Productconfig加入ProductConfig.idProductConfig

給出錯誤：

[錯誤]錯誤：每個UNION查詢必須有相同數量的列

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的當我嘗試inner join我在或接近inner

出現語法錯誤有沒有辦法加入這些2查詢在一起？

Answer 1

這是你想要什麼：

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; 

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，以及另一種更易讀的方式把它，是這樣的：

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; 

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對於UNION導致的表中的列數必須相同，並且來自相同/可轉換的數據類型。

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; 

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Select * from 
"ProductConfig","Board","PcbBuild","Model","TcssCalib","ProductBuild","TxResultsLink","TxResults","DspValues" 
where "Model"."idModel" = "PcbBuild"."Model" and "Board"."PcbBuild" = "PcbBuild"."idPcbBuild" 
and "Board"."idBoard" = "TcssCalib"."Board" and "ProductConfig"."TcssCalib" = "TcssCalib"."idTcssCalib" and "ProductBuild"."idProductBuild" 
= "TxResultsLink"."ProductBuild" and "TxResults"."idTxResults" = "TxResultsLink"."TxResults" 
and "TxResults"."DspValues" = "DspValues"."idDspValues" 
and "ProductBuild"."ProductConfig" = "ProductConfig"."idProductConfig";