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How to convert timestamp to datetime in MySQL?
How to convert 1300464000 to 2011-03-18 16:00:00 in MySQL?
5 Answers
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Illegal mix of collations MySQL Error
...E your_table_name CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;
MySQL sneaks swedish in there sometimes for no sensible reason.
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follo...
Two single-column indexes vs one two-column index in MySQL?
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"MySQL can use multiple-column indexes for queries that test all the columns in the index, or queries that test just the first column, the first two columns, the first three columns, and so on. If you specify the columns in th...
Why is it bad style to `rescue Exception => e` in Ruby?
... You can also ADAPTER_ERRORS = [::ActiveRecord::StatementInvalid, PGError, Mysql::Error, Mysql2::Error, ::ActiveRecord::JDBCError, SQLite3::Exception] and then rescue *ADAPTER_ERRORS => e
– j_mcnally
Feb 27 '14 at 2:19
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MyISAM versus InnoDB [closed]
...o
But, frequent reading, almost no writing, use MyISAM
Full-text search in MySQL <= 5.5, use MyISAM
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How to use php serialize() and unserialize()
...gone through the page u referred. can u please show an example in php, and mysql (if necessary) ?
– Istiaque Ahmed
Dec 27 '11 at 6:52
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浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术
...变为1 1000 0000 这样才能转化为
-128输出，不然1000 0000 如何输出？这当然是我的一种推断，具体怎么实现还得问CPU的设计者了。。。。
再看一个例子：
char a=-129;
printf("%d",a) ; 会输入多少？？ 结果为127 ，为...
Where is the Java SDK folder in my computer? Ubuntu 12.04
...in /usr/bin/java.
Dig again:
Step 2:
$ ls -l /usr/bin/java
lrwxrwxrwx 1 root root 22 2009-01-15 18:34 /usr/bin/java -> /etc/alternatives/java
So, now we know that /usr/bin/java is actually a symbolic link to /etc/alternatives/java.
Dig deeper using the same method above:
Step 3:
$ ls -l /...
MySQL Delete all rows from table and reset ID to zero
...wiping out. Enabling the foreign key checks after the fact does not cause MySQL to revalidate those foreign keys as far as I am aware. This leaves you with rows that contain data that does not exist in the reference table. You may as well not even have foreign keys on your table at all.
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How to log source file name and line number in Python
...way that sends debug logging to standard out:
import logging
import sys
root = logging.getLogger()
root.setLevel(logging.DEBUG)
ch = logging.StreamHandler(sys.stdout)
ch.setLevel(logging.DEBUG)
FORMAT = "[%(filename)s:%(lineno)s - %(funcName)20s() ] %(message)s"
formatter = logging.Formatter(FOR...