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How do I do top 1 in Oracle?
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If you want just a first selected row, you can:
select fname from MyTbl where rownum = 1
You can also use analytic functions to order and take the top x:
select max(fname) over (rank() order by some_factor) from MyTbl
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How to comment and uncomment blocks of code in the Office VBA Editor
...tor, go to View, Toolbars, Customise... or right click on the tool bar and select Customise...
Under the Commands tab, select the Edit menu on the left.
Then approximately two thirds of the way down there's two icons, Comment Block and Uncomment Block.
Drag and drop these onto your toolbar and th...
Can't choose class as main class in IntelliJ
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Select the folder containing the package tree of these classes, right-click and choose "Mark Directory as -> Source Root"
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Why are Where and Select outperforming just Select?
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Select iterates once over the entire set and, for each item, performs a conditional branch (checking for validity) and a + operation.
Where+Select creates an iterator that skips invalid elements (doesn't yield them), perform...
Concrete Javascript Regex for Accented Characters (Diacritics)
I've looked on Stack Overflow ( replacing characters.. eh , how JavaScript doesn't follow the Unicode standard concerning RegExp , etc.) and haven't really found a concrete answer to the question:
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How do I change read/write mode for a file using Emacs?
... (save-excursion
(unless (= return-value 0)
(goto-char (point-min))
(end-of-line)
(if (= (point-min) (point))
(error "Command failed: %s%s" command
(with-output-to-string
(dolist (arg args)
(pri...
Reading CSV files using C#
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Surely a char-based approach is more natural for this sort of problem than a regex. Depending on the presence of quotation marks the behavior is supposed to be different.
– Casey
May 9 '16 at 1:...
Where is the 'tests output pane'?
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This is the correct answer. Selecting "Tests" from the combobox is the key.
– Keith
Aug 29 '14 at 14:51
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How do I query between two dates using MySQL?
...ember 29 2010 and January 30 2010). Try reversing the order of the dates:
SELECT *
FROM `objects`
WHERE (date_field BETWEEN '2010-01-30 14:15:55' AND '2010-09-29 10:15:55')
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记一次数据库表自增长（Auto Increment）故障 - 数据库(内核) - 清泛网 - ...
...么我们不妨换个思路，显式设置唯一标识，比如说通过「SELECT MAX … FOR UPDATE」的方式直接查询得到唯一标识符，并在稍后执行的 INSERT 语句中显式设置。
不过这种方法不够透明，需要修改业务代码，更透明的方法是使用触发器...