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我在文件中查找重复记录有27个字段,我需要比较他们都在连续有没有一种方法来比较他们与出每个输入(一个办法串出来的记录格式数据)SQL将27个字段作为1个字段
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)
我知道我可以将它们连接起来都在一起,但是这仍然意味着打字所有的fi现在的名字,我只想要一个更简洁的选择。
您可能正在寻找'INTERSECT'。 – Siyual
INTERSECT仍然需要声明所有列 –
这就是SQL的工作原理。您可以通过过程或外部代码生成SQL语句并为您执行,因为您正在漫游到动态SQL的世界。 – JNevill