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我在文件中查找重複記錄有27個字段,我需要比較他們都在連續有沒有一種方法來比較他們與出每個輸入(一個辦法串出來的記錄格式數據)SQL將27個字段作爲1個字段
我使用
Select RRN(a),
RRN(b)
From fileX a
Inner Join fileX b
On RRN(a) < RRN(b)
And a.FLD1 = b.FLD1
And a.FLD2 = b.FLD2
And a.FLD3 = b.FLD3
And a.FLD5 = b.FLD5
And a.FLD6 = b.FLD6
And a.FLD7 = b.FLD7
And a.FLD8 = b.FLD8
And a.FLD9 = b.FLD9
And a.FLD10 = b.FLD10
And a.FLD11 = b.FLD11
And a.FLD12 = b.FLD12
And a.FLD13 = b.FLD13
And a.FLD14 = b.FLD14
And a.FLD15 = b.FLD15
And a.FLD16 = b.FLD16
And a.FLD17 = b.FLD17
And a.FLD18 = b.FLD18
And a.FLD19 = b.FLD19
And a.FLD21 = b.FLD21
And a.FLD22 = b.FLD22
And a.FLD23 = b.FLD23
And a.FLD24 = b.FLD24
And a.FLD25 = b.FLD25
And a.FLD26 = b.FLD26
And a.FLD27 = b.FLD27
我想用
Select RRN(a),
RRN(b)
From fileX a
Inner Join fileX b
On RRN(a) < RRN(b)
And substr(A.RCDFMT, 100, 54) = substr(B.RCDFMT, 100, 54)
我知道我可以將它們連接起來都在一起,但是這仍然意味着打字所有的fi現在的名字,我只想要一個更簡潔的選擇。
您可能正在尋找'INTERSECT'。 – Siyual
INTERSECT仍然需要聲明所有列 –
這就是SQL的工作原理。您可以通過過程或外部代碼生成SQL語句併爲您執行,因爲您正在漫遊到動態SQL的世界。 – JNevill