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Setting up foreign keys in phpMyAdmin?
..._id, in your case). Then, go to relation view (in the referring table) and select the referred column (so in your case foo.id) and the on update and on delete actions.
I think foreign keys are useful if you have multiple tables linked to one another, in particular, your delete scripts will become v...
The maximum recursion 100 has been exhausted before statement completion
...@EntDt = '12/31/2009';
declare @dcnt int;
;with DateList as
(
select @STARTDATE DateValue
union all
select DateValue + 1 from DateList
where DateValue + 1 < convert(VARCHAR(15),@EntDt,101)
)
select count(*) as DayCnt from (
select DateValue,...
What does Docker add to lxc-tools (the userspace LXC tools)?
...extremely fast, memory-cheap and disk-cheap.
This is provided by AUFS, a union filesystem that Docker depends on. You could set up AUFS yourself manually with LXC, but Docker uses it as a standard.
5) Logging: the standard streams (stdout/stderr/stdin) of each process container is collected an...
GROUP_CONCAT comma separator - MySQL
...
Query to achieve your requirment
SELECT id,GROUP_CONCAT(text SEPARATOR ' ') AS text FROM table_name group by id;
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How to change context root of a dynamic web project in Eclipse?
...nd redeploy. It worked for me.
If you are struck you have another choice: select the Tomcat server in the Servers view. Double clicking on that server (or selecting Open in the context menu) brings a multipage editor where there is a Modules page. Here you can change the root context of your module...
MySQL how to join tables on two fields
...
SELECT *
FROM t1
JOIN t2 USING (id, date)
perhaps you'll need to use INNEER JOIN or
where t2.id is not null
if you want results only matching both conditions
...
PDO's query vs execute
... multiple times. Example of prepared statements:
$sth = $dbh->prepare('SELECT name, colour, calories FROM fruit
WHERE calories < :calories AND colour = :colour');
$sth->bindParam(':calories', $calories);
$sth->bindParam(':colour', $colour);
$sth->execute();
// $calories or $color...
Avoiding SQL injection without parameters
...ion is wrong. You need to put apostrophes around the text:
string sql = "SELECT * FROM Users WHERE Name='" + SafeDBString(name) & "'";
SqlCommand getUser = new SqlCommand(sql, connection);
So that's one other thing parameters do for you: you don't need to worry about whether or not a value ...
__attribute__ - C/C++ - 清泛网 - 专注C/C++及内核技术
...nocommon，deprecated，mode，section，shared， tls_model，transparent_union，unused，vector_size，weak，dllimport，dlexport等，
详细信息可参考：
http://gcc.gnu.org/onlinedocs/gcc-4.0.0/gcc/Variable-Attributes.html#Variable-Attributes
类型属性（Type Attribute）
关键...
Simplest way to profile a PHP script
...connect_to_db();
prof_flag("Perform query");
// Get all the data
$select_query = "SELECT * FROM data_table";
$result = mysql_query($select_query);
prof_flag("Retrieve data");
$rows = array();
$found_data=false;
while($r = mysql_fetch_assoc($result))
{
$found_data=tru...