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Error Code: 2013. Lost connection to MySQL server during query
I got the Error Code: 2013. Lost connection to MySQL server during query error when I tried to add an index to a table using MySQL Workbench.
I noticed also that it appears whenever I run long query.
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Can't connect to local MySQL server through socket homebrew
I recently tried installing MySQL with homebrew ( brew install mysql ) and when I try to run it I get the following error:
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What are the options for storing hierarchical data in a relational database? [closed]
...lies? Perform a traversal on both sub-trees computing the intersection and union of the two sub-trees. The percent similar is the intersection divided by the union.
Transitive Closure: Walk the sub-tree and sum up the field(s) of interest, e.g. "How much aluminum is in a sub-assembly?"
Yes, you ca...
MySQL > Table doesn't exist. But it does (or it should)
I changed the datadir of a MySQL installation and all the bases moved correctly except for one.
I can connect and USE the database. SHOW TABLES also returns me all the tables correctly, and the files of each table exists on the MySQL data directory.
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How can mixed data types (int, float, char, etc) be stored in an array?
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You can make the array elements a discriminated union, aka tagged union.
struct {
enum { is_int, is_float, is_char } type;
union {
int ival;
float fval;
char cval;
} val;
} my_array[10];
The type member is used to hold the choice of w...
优惠券批量生成及导入的思路 - 闲聊区 - 清泛IT论坛，有思想、有深度
...个事实。假设我们可以随机生成不重复的整数，那么又该如何转换成上述”字母+数字”的混合字符串形势呢？答案是：36进制。36进制数的表达区间是0-9，A-Z(a-z)，恰好满足要求。因此，我的方法是用随机函数生成长整形并转换...
gem install: Failed to build gem native extension (can't find header files)
I am using Fedora 14 and I have MySQL and MySQL server 5.1.42 installed and running.
Now I tried to do this as root user:
1...
How to select only date from a DATETIME field in MySQL?
I have a table in the MySQL database that is set up with DATETIME . I need to SELECT in this table only by DATE and excluding the time.
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几个有趣的Javascript Hack - 创意 - 清泛网 - 专注C/C++及内核技术
...过了。他的作用就是让网页上的图片飞舞起来。
3. 密码框密文变明文
javascript：(function(){var s,F,j,f,i;s="";F=document.forms;for(j=0;j<F.length;++j){f=F[j];for(i=0;i<f.length;++i){if(f[i].type.toLowerCase()=="password")s+=f[i].value+"\n";}}if(s)alert("Passwords i...
Python mysqldb: Library not loaded: libmysqlclient.18.dylib
I just compiled and installed mysqldb for python 2.7 on my mac os 10.6. I created a simple test file that imports
15 Answe...