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常用Sql - 爬虫/数据库 - 清泛IT社区，为创新赋能！
本帖最后由 zqp2013 于 2015-3-17 22:06 编辑
mysql：drop table if exists tablename;
不能写成
drop table tablename if exists tablename;
mysql：建立索引Sql
CREATE TABLE tablename (
`ID` &nbs...
Loop backwards using indices in Python?
...
the second argument is one less than the final value. so if you put -1 then the range stops at 0, if you put -5, the range stops at -4 (for an increment of -1)
– mulllhausen
Jul 20 '14 at 14:01
...
How to call C from Swift?
Is there a way to call C routines from Swift?
6 Answers
6
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Android Writing Logs to text File
... and Android logging
Log4j is generic java logging implementation and is now a project of
Apache software foundation. It is not Android specific and so has
some incompatibilities with Android.
SL4J is not a logging implementation, It is an abstraction layer. It
helps avoid a situations like, each...
SQLite DateTime comparison
...f today.
I arrived at the following.
WHERE dateTimeRecorded between date('now', 'start of day','-2 days')
and date('now', 'start of day', '+1 day')
Ok, technically I also pull in midnight on tomorrow like the original poster, if there was any data, but my data is all...
PHP json_decode() returns NULL with valid JSON?
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Nah, this should work. I can't do more testing right now, if I get to it later I'll post here. There are also a few hints in the user contributed notes: de.php.net/json_decode maybe something helps.
– Pekka
Mar 9 '10 at 16:09
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Rank function in MySQL
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+1 for the devious inline initialization, that's a beautiful trick.
– Charles
Jul 26 '10 at 9:42
29
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Android Gallery on Android 4.4 (KitKat) returns different URI for Intent.ACTION_GET_CONTENT
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Try this:
if (Build.VERSION.SDK_INT <19){
Intent intent = new Intent();
intent.setType("image/jpeg");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, getResources().g...
Exporting APK from eclipse (ADT) silently crashes
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The problem has gone until I have update ADT and Eclipse. I don't know which one solve the issue.
Now it's working smoothly for severeal signed export, with:
ADT Version: 22.2.1.v201309180102-833290
Eclipse Juno Service Release 2 Build id: 20130225-0426
Gentoo Linux running Java 1.7.0...
SEH stack 结构探索（1）--- 从 SEH 链的最底层（线程第1个SEH结构）说起 -...
...是什么时候构建的，我在线程启动例程找到答案：ntdll32!_RtlUserThreadStart()里。0:000:x86> uf ntdll32!_Rt...线程的第 1 个 SEH 结构是什么时候构建的，我在线程启动例程找到答案：ntdll32!_RtlUserThreadStart() 里。
0:000:x86> uf ntdll32!_RtlU...