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外媒评本轮科技泡沫：创业公司首当其冲 九成将消失 - 资讯 - 清泛网 - 专注...
...部门主管安德鲁·博伊德（Andrew Boyd）说：“一家企业是如何从获风投支持的创业公司走过来的，目前不再有一个明确的界限。我们只是一家上市公司。”博伊德还补充说，富达国际目前有一个135人组成的分析师团队，这个团队...
Convert a date format in PHP
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What if I get this date 0000-00-00 from mySQL? it returns a wrong date like 31/12/1969 ...
– Enrique
Apr 29 '10 at 22:20
3
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ALTER TABLE to add a composite primary key
...r table you will get an error when trying to drop it. In some versions of mysql the error message there was malformed (as of 5.5.17, this error message is still
alter table parent drop column id;
ERROR 1025 (HY000): Error on rename of
'./test/#sql-a04_b' to './test/parent' (errno: 150).
If you ...
What is the difference between Amazon S3 and Amazon EC2 instance?
I need to create a web application using php mysql and html. The no.of requests and data will be very high. I need Amazon server space.
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What data type to use for hashed password field and what length?
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You can actually use CHAR(length of hash) to define your datatype for MySQL because each hashing algorithm will always evaluate out to the same number of characters. For example, SHA1 always returns a 40-character hexadecimal number.
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Error 908: Permission RECEIVE_SMS has been denied. - App Inventor 2 中...
...的讨论。一位用户遇到了这个问题，并询问是否有人知道如何解决。其他用户提供了一些可能的解决方案，包括检查应用程序权限设置、确保手机上的权限设置正确、重新编译应用程序等。有人建议检查应用程序是否有读取短信...
Checking if a field contains a string
.../reference/sql-comparison/
http://php.net/manual/en/mongo.sqltomongo.php
MySQL
SELECT * FROM users WHERE username LIKE "%Son%"
MongoDB
db.users.find({username:/Son/})
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how to get last insert id after insert query in codeigniter active record
...n insert query (active record style) used to insert the form fields into a MySQL table. I want to get the last auto-incremented id for the insert operation as the return value of my query but I have some problems with it.
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Why historically do people use 255 not 256 for database field magnitudes?
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255 was the varchar limit in mySQL4 and earlier.
Also 255 chars + Null terminator = 256
Or 1 byte length descriptor gives a possible range 0-255 chars
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剖析程序的内存布局 - C/C++ - 清泛网 - 专注C/C++及内核技术
...拟地址空间的布局就讲这些吧。下一篇文章将讨论内核是如何跟踪这些内存区域的。我们会分析内存映射，看看文件的读写操作是如何与之关联的，以及内存使用概况的含义。
布局 内存 程序