我不想按顺序在联合问询中使用区别。 按栏目分列的单独栏目和顺序各不相同。
I m trying to export some tables from SQL Server 2005 and then create those tables and populate them in Oracle. I have about 10 tables, varying from 4 columns up to 25. I m not using any constraints/...
我不想按顺序在联合问询中使用区别。 按栏目分列的单独栏目和顺序各不相同。
页: 1 服务器只允许你<代码>。 在<代码>DISTINCT清单中按列的>栏目分列,因为否则,非选列的栏目可能会在交回结果中对某一行进行不止一次的价值测绘。
如果你知道,情况并非如此,你可以使用计算结果。
;WITH CTE
AS (SELECT DISTINCT foo,
bar
FROM T)
SELECT foo
FROM CTE
ORDER BY bar
如果由于实际存在多个可能的<条码>、条码/条码>值,每条<条码> 那么,你需要毫不含糊地告诉它什么价值用于秩序。 例如,采用<代码>GROUP BY。
SELECT foo
FROM T
GROUP BY foo
ORDER BY MIN(bar)
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