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How do I automatically update a timestamp in PostgreSQL
...omatically update the time stamp when a new row is inserted as I can do in MySQL using CURRENT_TIMESTAMP.
4 Answers
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insert a NOT NULL column to an existing table
...crosoft SQL server. If you want to perform the same operation on Oracle or MySQL you need to use semicolon ; like that:
ALTER TABLE MY_TABLE ADD STAGE INT NULL;
UPDATE MY_TABLE SET <a valid not null values for your column>;
ALTER TABLE MY_TABLE ALTER COLUMN STAGE INT NOT NULL;
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XPath contains(text(),'some string') doesn't work when used with node with more than one Text subnod
...n:
//*[contains(text(), 'ABC')]
//* matches any descendant element of the root node. That is, any element but the root node.
[...] is a predicate, it filters the node-set. It returns nodes for which ... is true:
A predicate filters a node-set [...] to produce a new node-set. For each node in the n...
In C# check that filename is *possibly* valid (not that it exists) [duplicate]
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I enhanced this solution using bOk = System.IO.Path.IsPathRooted(fileName); instead of bOk = true;
– jing
Sep 24 '13 at 7:12
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Where and how is the _ViewStart.cshtml layout file linked?
... to organize views into other folders, you have to include the file in the root of those alternate view folders as well. For example, I moved all the Inspinia template views into a folder and ran this in the view engine ViewLocationFormats = ViewLocationFormats.Union(new string[] { "~/Inspinia/Exam...
Differences between socket.io and websockets
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what do you suggest we use to interact with mysql -> express.js / fastify.js or node.js directly... to build android and ios chat apps
– DragonFire
May 6 at 1:05
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Split value from one field to two
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Unfortunately MySQL does not feature a split string function. However you can create a user defined function for this, such as the one described in the following article:
MySQL Split String Function by Federico Cargnelutti
With that fu...
How to use OpenFileDialog to select a folder?
...ch is just the FolderBrowserDialog). It is completely unusable: a bunch of root dirs, a missing favorites panel, and the most horrible — you can't even paste a path there! And now as a programmer I see an advice to use it… Please, don't do it.
– Hi-Angel
Au...
Select first row in each GROUP BY group?
...mon problem can surprisingly be found in the one of most official sources, MySQL manual! See Examples of Common Queries :: The Rows Holding the Group-wise Maximum of a Certain Column.
How to get the start time of a long-running Linux process?
... PID %CPU %MEM VSZ RSS TT STAT STARTED CMD
root 1 0.0 0.1 2800 1152 ? Ss Mon Dec 23 00:31:44 2013 /sbin/init
root 5151 0.3 0.1 4732 1980 pts/2 S Sat Mar 8 16:50:47 2014 bash
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