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How to add new column to MYSQL table?
...r comment it looks like your'e only adding the new column if: mysql_query("SELECT * FROM assessment"); returns false. That's probably not what you wanted. Try removing the '!' on front of $sql in the first 'if' statement. So your code will look like:
$sql=mysql_query("SELECT * FROM assessment");
if...
PDO MySQL: Use PDO::ATTR_EMULATE_PREPARES or not?
... I'm using caches on multiple levels anyway. You can always explicitly use SELECT SQL_CACHE <rest of statement> though.
– Will Morgan
May 4 '12 at 16:37
...
初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...插件目录我们能看到innodb_engine.so和libmemcached.so：
mysql> SELECT @@plugin_dir;
+------------------------------+
| @@plugin_dir |
+------------------------------+
| /usr/local/mysql/lib/plugin/ |
+------------------------------+
此外还需要导入Memcached插...
AngularJS : automatically detect change in model
...s model being deep dirty-checked, possibly multiple times). In that case, selective $watch()es or selective ng-change would be better.
– Mark Rajcok
Mar 15 '13 at 3:57
add a ...
Finding most changed files in Git
...git log --pretty=format: --name-only | sort | uniq -c | sort -Descending | select -First 10
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How do I access my SSH public key?
...="xclip -sel clip" and then pbcopy < ~/.ssh/id_rsa.pub OR simply xclip -selection clipboard < ~/.ssh/id_rsa.pub
– gebbissimo
Mar 8 '19 at 12:29
...
How Pony (ORM) does its tricks?
...s query:
>>> from pony.orm.examples.estore import *
>>> select(c for c in Customer if c.country == 'USA').show()
Which will be translated into the following SQL:
SELECT "c"."id", "c"."email", "c"."password", "c"."name", "c"."country", "c"."address"
FROM "Customer" "c"
WHERE "c"...
Huawei, logcat not showing the log for my app?
...
For Huawei with Android 8.0+
we must dial the code: *#*#2846579#*#*
and selecting the option AP Log will be enough to display the messages in the LogCat.
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Stop Visual Studio from launching a new browser window when starting debug?
...ed answer for a .NET Core Web Api project...
Right-click on your project, select "Properties," go to "Debug" and untick the "Launch browser" checkbox (enabled by default).
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How to delete a certain row from mysql table with same column values?
...ike this:
DELETE FROM your_table WHERE id_users=1 AND id_product=2
LIMIT (SELECT COUNT(*)-1 FROM your_table WHERE id_users=1 AND id_product=2)
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