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On Duplicate Key Update same as insert
... update it in any case?
For eg. if your columns a to g are already set as 2 to 8; there would be no need to re-update it.
Alternatively, you can use:
INSERT INTO table (id,a,b,c,d,e,f,g)
VALUES (1,2,3,4,5,6,7,8)
ON DUPLICATE KEY
UPDATE a=a, b=b, c=c, d=d, e=e, f=f, g=g;
To get the id from ...
Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
...tiple courses, books, and jobs, I have seen text fields defined as VARCHAR(255) as kind of the default for "shortish" text. Is there any good reason that a length of 255 is chosen so often, other than being a nice round number ? Is it a holdout from some time in the past when there was a good rea...
Which concurrent Queue implementation should I use in Java?
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community wiki
2 revs, 2 users 86%Yishai
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Regular expression for floating point numbers
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In vim, how do I get a file to open at the same line number I closed it at last time?
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T Zengerink
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answered Apr 21 '09 at 21:03
moinudinmoinudin
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Find nearest latitude/longitude with an SQL query
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219
SELECT latitude, longitude, SQRT(
POW(69.1 * (latitude - [startlat]), 2) +
POW(69.1 * ...
LINQ Using Max() to select a single row
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233
I don't see why you are grouping here.
Try this:
var maxValue = table.Max(x => x.Status)
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How to redirect stderr to null in cmd.exe
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Your DOS command 2> nul
Read page Using command redirection operators. Besides the "2>" construct mentioned by Tanuki Software, it lists some other useful combinations.
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Get exit code of a background process
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