大约有 4,700 项符合查询结果（耗时：0.0222秒） [XML]
How to select all records from one table that do not exist in another table?
...ld 3 from table one where the combination of field ad field2 is not in the second table. Other than modifying the join in this answer, I do not see a way to do it with some of the other "more efficient answers" argued for below
– TMWP
May 2 '18 at 19:18
...
How to set time delay in javascript
...in my website to switch images but need a delay when you click the image a second time. The delay should be 1000ms. So you would click the img.jpg then the img_onclick.jpg would appear. You would then click the img_onclick.jpg image there should then be a delay of 1000ms before the img.jpg is shown ...
How to get the sizes of the tables of a MySQL database?
...he first tab
"Info" shows a rough estimate of the database size in MB.
The second tab, "Tables", shows Data length and other details for each table.
share
|
improve this answer
|
...
How can I convert a datetime object to milliseconds since epoch (unix time) in Python?
I have a Python datetime object that I want to convert to unix time, or seconds/milliseconds since the 1970 epoch.
13 Ans...
What is the difference between JOIN and UNION?
...bah;
+-----+
| bah |
+-----+
| 23 |
| 45 |
+-----+
2 rows in set (0.00 sec)
similary trivial example of JOIN:
mysql> SELECT * FROM
-> (SELECT 23 AS bah) AS foo
-> JOIN
-> (SELECT 45 AS bah) AS bar
-> ON (33=33);
+-----+-----+
| foo | bar |
+-----+-----+
| 23...
C# DateTime to “YYYYMMDDHHMMSS” format
... = 24 hour. I suspect someone started with time and said hms = hours mins seconds, then H became 24 hour and then they got to date and ran out of unique letters so went with case. Just one of those things.
– Douglas Anderson
May 23 '17 at 14:49
...
Right HTTP status code to wrong input
...le to this case? Definition in http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html says:
"The request could not be understood by the server due to malformed syntax. The client SHOULD NOT repeat the request without modifications. "
...
Looping a video with AVFoundation AVPlayer?
...his for a certain time frame within the video? For example the video is 60 secs but I want to loop the first 10 secs only
– Lance Samaria
Jun 17 at 19:10
...
Can table columns with a Foreign Key be NULL?
... child (id, parent_id) VALUES (1, NULL);
-- Query OK, 1 row affected (0.01 sec)
INSERT INTO child (id, parent_id) VALUES (2, 1);
-- ERROR 1452 (23000): Cannot add or update a child row: a foreign key
-- constraint fails (`t/child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY
-- (`parent_id`) REFERENCE...
How do I focus on one spec in jasmine.js?
...42.0.2311 (Mac OS X 10.10.3): Executed 1 of 14 (skipped 13) SUCCESS (0.012 secs / 0.009 secs)
[20:59:16] Finished 'default' after 2.08 s
Also see: https://github.com/karma-runner/karma-jasmine
share
|
...