sllev讓我走上了正軌。就我而言,因爲除了一個值以外,所有的值在任何給定的列中總是爲空,所以我只需要使用MAX()函數。我最後的SQL語句如下所示:
Select MAX(Merge_Table_Parcel_1.txtFrequency1) AS Frequency1,
MAX(Merge_Table_Parcel_1.SUM_INST_N) AS SUM_INST_N1,
MAX(Merge_Table_Parcel_1.SUM_INST_D) AS SUM_INST_D1,
MAX(Merge_Table_Parcel_1.SUM_CTRN_D) AS SUM_CTRN_D1,
MAX(Merge_Table_Parcel_1.SUM_CTRN_N) AS SUM_CTRN_N1,
MAX(Merge_Table_Parcel_1.SUM_TRAN_N) AS SUM_TRAN_N1,
MAX(Merge_Table_Parcel_1.SUM_PPU) AS SUM_PPU1,
MAX(Merge_Table_Parcel_1.SUM_PPUJOBS) AS SUM_PPUJOBS1,
MAX(Merge_Table_Parcel_1.SUM_DAYT) AS SUM_DAYT1,
MAX(Merge_Table_Parcel_1.SUM_RESD_D) AS SUM_RESD_D1,
MAX(Merge_Table_Parcel_1.SUM_RESD_N) AS SUM_RESD_N1,
MAX(Merge_Table_Parcel_1.SUM_ON_STRN_D) AS SUM_ON_STRN_D1,
MAX(Merge_Table_Parcel_1.SUM_ON_STRN_N) AS SUM_ON_STRN_N1
FROM Merge_Table_Parcel_1
簡單,我知道,但我偶然看到它馬上。感謝所有提供答覆的人,並感謝sllev誰指出我正確的方向。
爲什麼/如何將row1/2/3合併爲一行?你如何確定他們應該組合在一起? –
您需要更多信息;你是否試圖將*整個*表合併爲一行?如果不是,你如何定義構成一行的行的子集?無論哪種方式,你如何確定將有多少值,比如說,如果多行有一個值,那麼「col」呢?你想要最大?分?和? etc. –
如何合併這些行:| 1 | NULL | 2和| 3 | NULL | 4,只需總和值? – sll