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How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
... very frequently asked question here is how to do an upsert, which is what MySQL calls INSERT ... ON DUPLICATE UPDATE and the standard supports as part of the MERGE operation.
...
setuptools: package data folder location
...stall as package data
The main advantage of placing data files inside the root of your Python package
is that it lets you avoid worrying about where the files will live on a user's
system, which may be Windows, Mac, Linux, some mobile platform, or inside an Egg. You can
always find the directory da...
How to get the max of two values in MySQL?
...
This is why I honestly hate MySQL. What a tremendous amount of work to do such a simple thing.
– Monica Heddneck
Aug 2 '17 at 23:51
9...
Group by month and year in MySQL
...e results.
N.B. I wasn't aware you could add DESC to a GROUP BY clause in MySQL, perhaps you are missing an ORDER BY clause:
SELECT EXTRACT(YEAR_MONTH FROM summaryDateTime) summary_year_month
FROM trading_summary
GROUP BY summary_year_month
ORDER BY summary_year_month DESC;
...
How to get database structure in MySQL via query
Is it possible to somehow get structure of MySQL database, or just some table with simple query?
10 Answers
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无人驾驶汽车大难题 人工智能同人的差距显著 - 资讯 - 清泛网 - 专注C/C++...
...出，在谷歌总部所在的山景城进行公路测试，正式学习该如何与普通汽车在公路上共同行进。谷歌还事先在无人驾驶车的“大脑”里加入了山景城的高精度虚拟地图，但这显然很难复制。从这一点上看，互联网公司宣称的“无人...
Compiling Java 7 code via Maven
...ystem/Library/Frameworks/JavaVM.framework/Versions/
total 64
lrwxr-xr-x 1 root wheel 10 30 Oct 16:18 1.4 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 30 Oct 16:18 1.4.2 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 30 Oct 16:18 1.5 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 30 Oct 16:1...
Why would you use Oracle database? [closed]
...acle database versus the latest flavors of:
1) Microsoft SQL Server
2) MySQL
3) PostgreSQL
6 Answers
...
MySQL Select Date Equal to Today
I'm trying to run a mysql select statement where it looks at today's date and only returns results that signed up on that current day. I've currently tried the following, but it doesn't seem to work.
...
How to get URL of current page in PHP [duplicate]
...RVER['SCRIPT_FILENAME']. The latter 2 give you the complete path (from the root of the server), rather than just the root of your website. They are useful for includes and such.
$_SERVER['PHP_SELF'] gives you the file name relative to the root of the website.
$relative_path = $_SERVER['PHP_SELF']...