Question

我需要从这3个表中选择Building，RoomMin和RoomMax，并将它们显示在不同的字段中。

表

GenericTableDataID  Building
17                  B1
18                  B1
20                  B1

RoomMinDataID   RoomMin
17              200
20              100

RoomMaxDataID   RoomMax
17              299
18              399

期望的结果

GenericTableDataID  Building    RoomMin RoomMax
17                  B1          200     299

尝试失败：

SELECT GenericTableData.GenericTableDataID, ValueString AS Building, ValueString AS RoomMin, ValueString AS RoomMax
FROM GenericTableData INNER JOIN
    GenericTableDataField ON GenericTableData.GenericTableDataID = GenericTableDataField.GenericTableDataID INNER JOIN
    GenericTableDefinition ON GenericTableData.GenericTableDefinitionID = GenericTableDefinition.GenericTableDefinitionID INNER JOIN
    GenericTableDefinitionField ON GenericTableDataField.GenericTableDefinitionFieldID = GenericTableDefinitionField.GenericTableDefinitionFieldID AND 
    GenericTableDefinition.GenericTableDefinitionID = GenericTableDefinitionField.GenericTableDefinitionID
WHERE GenericTableDefinitionField.GenericTableDefinitionFieldID = 13 -- Access Level
    AND GenericTableData.GenericTableDataID IN (  -- RoomMin
        SELECT GenericTableData.GenericTableDataID
        FROM GenericTableData INNER JOIN
            GenericTableDataField ON GenericTableData.GenericTableDataID = GenericTableDataField.GenericTableDataID INNER JOIN
            GenericTableDefinition ON GenericTableData.GenericTableDefinitionID = GenericTableDefinition.GenericTableDefinitionID INNER JOIN
            GenericTableDefinitionField ON GenericTableDataField.GenericTableDefinitionFieldID = GenericTableDefinitionField.GenericTableDefinitionFieldID AND 
            GenericTableDefinition.GenericTableDefinitionID = GenericTableDefinitionField.GenericTableDefinitionID
        WHERE ValueInteger <= '235'
            AND GenericTableData.GenericTableDataID IN ( -- List of data that are associated with B1
                SELECT GenericTableData.GenericTableDataID
                FROM GenericTableData INNER JOIN
                    GenericTableDataField ON GenericTableData.GenericTableDataID = GenericTableDataField.GenericTableDataID INNER JOIN
                    GenericTableDefinition ON GenericTableData.GenericTableDefinitionID = GenericTableDefinition.GenericTableDefinitionID INNER JOIN
                    GenericTableDefinitionField ON GenericTableDataField.GenericTableDefinitionFieldID = GenericTableDefinitionField.GenericTableDefinitionFieldID AND 
                    GenericTableDefinition.GenericTableDefinitionID = GenericTableDefinitionField.GenericTableDefinitionID
                WHERE ValueString LIKE 'B1'
            )
            AND GenericTableDefinitionField.GenericTableDefinitionFieldID = 11          
    )
    AND GenericTableData.GenericTableDataID IN (  -- RoomMax
        SELECT GenericTableData.GenericTableDataID
        FROM GenericTableData INNER JOIN
            GenericTableDataField ON GenericTableData.GenericTableDataID = GenericTableDataField.GenericTableDataID INNER JOIN
            GenericTableDefinition ON GenericTableData.GenericTableDefinitionID = GenericTableDefinition.GenericTableDefinitionID INNER JOIN
            GenericTableDefinitionField ON GenericTableDataField.GenericTableDefinitionFieldID = GenericTableDefinitionField.GenericTableDefinitionFieldID AND 
            GenericTableDefinition.GenericTableDefinitionID = GenericTableDefinitionField.GenericTableDefinitionID
        WHERE ValueInteger >= '235'
            AND GenericTableData.GenericTableDataID IN ( -- List of data that are associated with B1
                SELECT GenericTableData.GenericTableDataID
                FROM GenericTableData INNER JOIN
                    GenericTableDataField ON GenericTableData.GenericTableDataID = GenericTableDataField.GenericTableDataID INNER JOIN
                    GenericTableDefinition ON GenericTableData.GenericTableDefinitionID = GenericTableDefinition.GenericTableDefinitionID INNER JOIN
                    GenericTableDefinitionField ON GenericTableDataField.GenericTableDefinitionFieldID = GenericTableDefinitionField.GenericTableDefinitionFieldID AND 
                    GenericTableDefinition.GenericTableDefinitionID = GenericTableDefinitionField.GenericTableDefinitionID
                WHERE ValueString LIKE 'B1'
            )
            AND GenericTableDefinitionField.GenericTableDefinitionFieldID = 12
    )

我的上述查询不会返回任何行，因为我正在尝试在内部WHERE SELECTS中搜索特定的建筑物房间号。

Answer 1

试试这个：

SELECT generic.GenericTableId
     , Building
     , RoomMin
     , RoomMax
FROM GenericTableDataId generic
     JOIN RoomMinDataId min_data ON generic.GenericTableDataId = min_data.RoomMinDataId
     JOIN RoomMaxDataId max_data ON generic.GenericTableDataId = max_data.RoomMaxDataId

Answer 2

SELECT A.GenericTableDataID, A.Building, B.RoomMin, C.RoomMax
FROM table_1 AS A 
JOIN table_2 AS B ON
    A.GenericTableID = B.RoomMinDataID
JOIN table_3 AS C ON
    A.GenericTableID = C.RoomMaxDataID
WHERE A.GenericTableID = 17

table_1是您问题的首页，table_2是中间，table_3是底部。

Answer 3

作为“gr1zzly be4r”的帖子，您可以使用JOIN函数并使用一些别名

SELECT GenericTableDataID,Building,RoomMin,RoomMax 
From table1 
join table2 on
  GenericTableDataID=RoomMinDataID
join table3 on
  RoomMinDataID=RoomMaxDataID
where GenericTableDataID = 17

另外，另一个选择

select GenericTableDataID,Building,RoomMin,RoomMax 
FROM table1,table2,table3
where GenericTableDataID=RoomMinDataID and RoomMinDataID=RoomMaxDataID and GenericTableDataID=17

Answer 4

这是我的最终查询：

SELECT DISTINCT Data.GenericTableDataID AS AccessLevelID, TDRR.Building, TDRR.RoomMin, LTDRR.RoomMax, DataF.ValueString AS AccessLevel
FROM GenericTableData Data
    INNER JOIN GenericTableDataField DataF ON Data.GenericTableDataID = DataF.GenericTableDataID
    INNER JOIN GenericTableDefinition Def ON Data.GenericTableDefinitionID = Def.GenericTableDefinitionID
    INNER JOIN GenericTableDefinitionField DefF ON DataF.GenericTableDefinitionFieldID = DefF.GenericTableDefinitionFieldID AND 
        Def.GenericTableDefinitionID = DefF.GenericTableDefinitionID
    INNER JOIN TableDataRoomRanges TDRR ON TDRR.BuildingDataID = Data.GenericTableDataID
WHERE DefF.GenericTableDefinitionFieldID = 13

-- Query for TableDataRoomRanges view
SELECT TableDataBuildings.BuildingDataID, TableDataBuildings.Building, TableDataRoomMin.RoomMin, TableDataRoomMax.RoomMax
FROM 
    TableDataBuildings
INNER JOIN
    TableDataRoomMin ON TableDataBuildings.BuildingDataID = TableDataRoomMin.RoomMinDataID
INNER JOIN
    TableDataRoomMax ON TableDataBuildings.BuildingDataID = TableDataRoomMax.RoomMaxDataID

Answer 5

下面：

select 
  gt.GenericTableDataID,
  gt.Building, 
  rmn.RoomMin,
  rmx.RoomMax
from 
  GenericTable gt,
  Roommin rmn,
  Roommax rmx
where 
  gt.GenericTableDataID = rmn.RoomMinDataID
  and gt.GenericTableDataID = rmx.RoomMaxDataID

从3个表中选择行并显示在1行中

5 个答案: