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Foreign key constraints: When to use ON UPDATE and ON DELETE
...
user_id INT,
user_name VARCHAR(50),
company_id INT,
INDEX company_id_idx (company_id),
FOREIGN KEY (company_id) REFERENCES COMPANY (company_id) ON...
) ENGINE=INNODB;
Let's look at the ON UPDATE clause:
ON UPDATE RESTRICT : the default : if you try to update a company...
Abort Ajax requests using jQuery
...abort the request.
var xhr = $.ajax({
type: "POST",
url: "some.php",
data: "name=John&location=Boston",
success: function(msg){
alert( "Data Saved: " + msg );
}
});
//kill the request
xhr.abort()
UPDATE:
As of jQuery 1.5 the returned object is a wrapper for the ...
Can you create nested WITH clauses for Common Table Expressions?
...ot strictly nested, you can use common table expressions to reuse previous queries in subsequent ones.
To do this, the form of the statement you are looking for would be
WITH x AS
(
SELECT * FROM MyTable
),
y AS
(
SELECT * FROM x
)
SELECT * FROM y
...
How to mkdir only if a directory does not already exist?
...amp; and make more sense to those reading it.
– Mike Q
Jun 16 '14 at 17:36
18
@AndreasLarsen This...
Is there a better way to find out if a local git branch exists?
...at branch names can have surprising characters in them, so you may want to quote <branch-name>.
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Merge, update, and pull Git branches without using checkouts
...nfiguration file, like this one:
[alias]
sync = !sh -c 'git checkout --quiet HEAD; git fetch upstream master:master; git checkout --quiet -'
What this alias does is the following:
git checkout HEAD: this puts your working copy into a detached-head state. This is useful if you want to update ma...
Linux日志管理Rsyslog入门 - C/C++ - 清泛网 - 专注IT技能提升
...set(name="analysis") {
action(type="omprog"
Binary="/usr/bin/php /path/to/script.php"
Template="msg")
stop
}
数据通过管道无缝传递给外部程序，可以说赋予了Rsyslog更多的可能性，你可以使用任何熟悉的语言来实现，以PHP为例，...
Linux日志管理Rsyslog入门 - C/C++ - 清泛网 - 专注IT技能提升
...set(name="analysis") {
action(type="omprog"
Binary="/usr/bin/php /path/to/script.php"
Template="msg")
stop
}
数据通过管道无缝传递给外部程序，可以说赋予了Rsyslog更多的可能性，你可以使用任何熟悉的语言来实现，以PHP为例，...
Linux日志管理Rsyslog入门 - C/C++ - 清泛网 - 专注IT技能提升
...set(name="analysis") {
action(type="omprog"
Binary="/usr/bin/php /path/to/script.php"
Template="msg")
stop
}
数据通过管道无缝传递给外部程序，可以说赋予了Rsyslog更多的可能性，你可以使用任何熟悉的语言来实现，以PHP为例，...
Linux日志管理Rsyslog入门 - C/C++ - 清泛网 - 专注IT技能提升
...set(name="analysis") {
action(type="omprog"
Binary="/usr/bin/php /path/to/script.php"
Template="msg")
stop
}
数据通过管道无缝传递给外部程序，可以说赋予了Rsyslog更多的可能性，你可以使用任何熟悉的语言来实现，以PHP为例，...