大约有 41,300 项符合查询结果（耗时：0.1177秒） [XML]
How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
... INTO `usage`
(`thing_id`, `times_used`, `first_time_used`)
VALUES
(4815162342, 1, NOW())
ON DUPLICATE KEY UPDATE
`times_used` = `times_used` + 1
share
|
improve this answer
|
...
How does View Controller Containment work in iOS 5?
...
|
edited May 23 '17 at 12:17
Community♦
111 silver badge
answered Dec 5 '11 at 0:53
...
'Specified condition “$(PackageAsSingleFile)” evaluates to “” instead of a boolean?
...
answered Apr 1 '13 at 20:04
Rusty DivineRusty Divine
3,35411 gold badge1818 silver badges1515 bronze badges
...
Can pandas automatically recognize dates?
...
336
You should add parse_dates=True, or parse_dates=['column name'] when reading, thats usually en...
Android Replace “…” with ellipsis character
...
… is the unicode for "…" so just replace it. It's better to have it as one char/symbol than three dots.
share
|
improve...
Why use make over a shell script?
...
132
The general idea is that make supports (reasonably) minimal rebuilds -- i.e., you tell it what ...
Debug a java application without starting the JVM with debug arguments
...
Zitrax
14.9k1313 gold badges7777 silver badges9393 bronze badges
answered Dec 17 '08 at 22:27
McDowellMcDowell
...
How do I use define_method to create class methods?
..._class.define_method
– Pyro
Feb 5 '13 at 5:41
@Pyro Just to clarify, would you just go singleton_class.define_method :...
Why isn't there a Guid.IsNullOrEmpty() method
...
236
Guid is a value type, so a variable of type Guid can't be null to start with. If you want to kn...
Iteration over std::vector: unsigned vs signed index variable
...
833
For iterating backwards see this answer.
Iterating forwards is almost identical. Just change ...