大约有 19,000 项符合查询结果（耗时：0.0279秒） [XML]
MySQL INSERT INTO table VALUES.. vs INSERT INTO table SET
... the second is MySQL's extension.
So they should be exactly equivalent performance wise.
http://dev.mysql.com/doc/refman/5.6/en/insert.html says:
INSERT inserts new rows into an existing table. The INSERT ... VALUES and INSERT ... SET forms of the statement insert rows based on explicitly spec...
HTML text input allow only numeric input
...t varies:
Most browsers will only validate the input when submitting the form, and not when typing.
Most mobile browsers don't support the step, min and max attributes.
Chrome (version 71.0.3578.98) still allows the user to enter the characters e and E into the field. Also see this question.
Firef...
Static linking vs dynamic linking
Are there any compelling performance reasons to choose static linking over dynamic linking or vice versa in certain situations? I've heard or read the following, but I don't know enough on the subject to vouch for its veracity.
...
What are all the escape characters?
....
\r Insert a carriage return in the text at this point.
\f Insert a formfeed in the text at this point.
\' Insert a single quote character in the text at this point.
\" Insert a double quote character in the text at this point.
\\ Insert a backslash character in the text at this poin...
How do I run all Python unit tests in a directory?
...ectory that contains my Python unit tests. Each unit test module is of the form test_*.py . I am attempting to make a file called all_test.py that will, you guessed it, run all files in the aforementioned test form and return the result. I have tried two methods so far; both have failed. I will s...
jQuery UI Sortable, then write order into a database
...tation says for using serialize option you should define id as name_number format.
– parisssss
Jun 15 '14 at 19:12
5
...
UTF-8 all the way through
... connection character set, which both updates its own internal state and informs MySQL of the encoding to be used on the connection—this is usually the preferred approach. In PHP:
If you're using the PDO abstraction layer with PHP ≥ 5.3.6, you can specify charset in the DSN:
$dbh = new PDO('...
How to tell whether a point is to the right or left side of a line
...re a = line point 1; b = line point 2; c = point to check against.
If the formula is equal to 0, the points are colinear.
If the line is horizontal, then this returns true if the point is above the line.
share
|
...
Why should I use 'li' instead of 'div'?
...VER, back in the day (and maybe still), each browser added it's own little formatting to list elements, like spacing, margins, etc, so that is exactly why a lot of people prefer using divs. because no one wants to add a bunch of code to zero out formatting, or to detect browsers, and those slight d...
Should I use past or present tense in git commit messages? [closed]
...I think this is an excellent choice. Think about what a commit is, in diff form: a set of instructions for how to go from a previous state to a new state. Just as the diff says "add this line here, remove this line here", the commit message says in qualitative terms "make this change". (Yes, git doe...