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我有這個怪物查詢從我的逆向工程的Java應用程序。如何自我加入和案件時
`
SELECT
T.transferNumber,
T.TransferNumber,
T.BarrelsRequested - T.TotalBarrels br,
TrTy.TransferTypeName,
TrTa.SourceDest,
Ta.TankName,
SBP.SBPName,
T.Notes
FROM
RC.Transfers T,
RC.TransferTypes TrTy,
RC.TransferTank TrTa,
RC.Tanks Ta,
RC.ShipBargePipe SBP
WHERE
T.TransferTypeNumber = TrTy.TransferTypeNumber
AND T.TransferNumber = TrTa.TransferNumber
AND TrTa.TankNumber = Ta.TankNumber
AND T.SBPNumber = SBP.SBPNumber
AND T.StartStamp IS NOT NULL
AND T.EndStamp IS NULL
AND T.Void IS NULL
AND TrTy.TransferTypeName <> 'Truck'
UNION SELECT
T.transferNumber,
T.TransferNumber,
T.BarrelsRequested - T.TotalBarrels,
TrTy.TransferTypeName,
TrTa.SourceDest,
Ta.TankName,
'',
T.Notes
FROM
RC.Transfers T,
RC.TransferTypes TrTy,
RC.TransferTank TrTa,
RC.Tanks Ta
WHERE
T.TransferTypeNumber = TrTy.TransferTypeNumber
AND T.TransferNumber = TrTa.TransferNumber
AND TrTa.TankNumber = Ta.TankNumber
AND T.SBPNumber IS NULL
AND T.StartStamp IS NOT NULL
AND T.EndStamp IS NULL
AND T.Void IS NULL
AND TrTy.TransferTypeName <> 'Truck'
`
這將返回的結果集的：
但我真的想：
任何幫助將不勝感激。如圖所示，我希望具有相同傳輸號碼的行在一行上顯示。我想加盟，我可以做到這一點使用自和 情況下，當SourceDest =「s」，因爲「從」 情況下，當SourceDest =「d」 AS「TO」
還要注意，當類型爲船舶或管道，然後from或To列成爲SBPName，取決於它是源還是目標。
謝謝！隨意修改我的問題，因爲你覺得合適。
編輯*
在這裏是表示它們是如何分組的行一起Java源代碼。 `
void updateRunning(Connection conn)
throws SQLException
{
Query q = new Query(conn);
this.jLabelRunningUpdate.setText("Reading");
this.jLabelRunningUpdate.setVisible(true);
q
.setQuery("SELECT T.transferNumber, T.TransferNumber, T.BarrelsRequested - T.TotalBarrels br, TrTy.TransferTypeName, TrTa.SourceDest, Ta.TankName, SBP.SBPName, T.Notes FROM RC.Transfers T, RC.TransferTypes TrTy, RC.TransferTank TrTa, RC.Tanks Ta, RC.ShipBargePipe SBP WHERE T.TransferTypeNumber = TrTy.TransferTypeNumber AND T.TransferNumber = TrTa.TransferNumber AND TrTa.TankNumber = Ta.TankNumber AND T.SBPNumber = SBP.SBPNumber AND T.StartStamp is not NULL AND T.EndStamp is NULL AND T.Void is NULL AND TrTy.TransferTypeName <> 'Truck' UNION SELECT T.transferNumber, T.TransferNumber, T.BarrelsRequested - T.TotalBarrels, TrTy.TransferTypeName, TrTa.SourceDest, Ta.TankName, '', T.Notes FROM RC.Transfers T, RC.TransferTypes TrTy, RC.TransferTank TrTa, RC.Tanks Ta WHERE T.TransferTypeNumber = TrTy.TransferTypeNumber AND T.TransferNumber = TrTa.TransferNumber AND TrTa.TankNumber = Ta.TankNumber AND T.SBPNumber is NULL AND T.StartStamp is not NULL AND T.EndStamp is NULL AND T.Void is NULL AND TrTy.TransferTypeName <> 'Truck'");
ResultSetCA transfers = q.execute(false);
this.jLabelRunningUpdate.setText("Updating");
String sourceTankList = "";
String destinationTankList = "";
ResultSetCA runningList = new ResultSetCA();
for (int count = 0; count < transfers.size(); count++)
{
sourceTankList = "";
destinationTankList = "";
String currentTNumber = transfers.getString(count, "transferNumber");
while ((count < transfers.size()) && (
currentTNumber.equals(transfers.getString(count, "transferNumber"))))
{
String sourceDest = transfers.getString(count, "sourceDest");
String tankName = transfers.getString(count, "tankName");
if (sourceDest.equals("s")) {
sourceTankList = sourceTankList + tankName + ", ";
} else {
destinationTankList = destinationTankList + tankName + ", ";
}
count++;
}
if (!sourceTankList.equals("")) {
sourceTankList = sourceTankList.substring(0, sourceTankList.length() - 2);
}
if (!destinationTankList.equals("")) {
destinationTankList =
destinationTankList.substring(0, destinationTankList.length() - 2);
}
count--;int lastCount = count;
String transferTypeName = transfers.getString(lastCount, "transferTypeName");
if (!transferTypeName.equals("Tank"))
{
String sbpName = transfers.getString(lastCount, "sbpName");
if (sourceTankList.equals("")) {
sourceTankList = sbpName;
} else {
destinationTankList = sbpName;
}
}
Number barrelsRemaining = transfers.getNumber(lastCount, "br");
Object BBLS;
Object BBLS;
if (barrelsRemaining == null) {
BBLS = "????";
} else {
BBLS = new Integer(barrelsRemaining.intValue());
}
Vector register = new Vector();
Integer transferNumber = transfers.getInteger(lastCount, "transferNumber");
String transferTName = transfers.getString(lastCount, "transferTypeName");
String notes = transfers.getString(lastCount, "notes");
register.add(transferNumber);
register.add(transferNumber);
register.add(BBLS);
register.add(transferTName);
register.add(sourceTankList);
register.add(destinationTankList);
register.add(notes);
runningList.add(register);
}
Object key = null;
if (this.jTableTransfersRunning.getSelectedRow() != -1) {
key = this.jTableTransfersRunning.getSelectedKey();
}
this.jTableTransfersRunning.fill(runningList);
if (runningList.size() > 0) {
if (key != null) {
this.jTableTransfersRunning.setSelectedKey(key);
}
}
this.jLabelRunningUpdate.setVisible(false);
}
`
返回一行： transferNubmer，桶離開，船舶，TransferTypeName，發件人，收件人，說明 76252,108，坦克，坦克，空，坦克051A '' –
轉移數它返回的（假設它是從你問題的其中一行）。 transferNumber和TransferNumber之間有什麼區別/意義？ –
它將一個坦克返回坦克轉移。這是76252. 他們如何做坦克到坦克，或坦克到船/駁船，或駁船/船到坦克，這很奇怪。 –