大约有 48,000 项符合查询结果(耗时:0.0735秒) [XML]
Unique constraint on multiple columns
...
294
By using the constraint definition on table creation, you can specify one or multiple constrai...
What is a callback URL in relation to an API?
...
answered Apr 28 '14 at 17:12
Eric SteinEric Stein
11k22 gold badges2828 silver badges4949 bronze badges
...
What is this crazy C++11 syntax ==> struct : bar {} foo {};?
...
2 Answers
2
Active
...
What's the difference between using CGFloat and float?
... types were introduced to make it easier to write code that works on both 32-bit and 64-bit without modification. However, if all you need is float precision within your own code, you can still use float if you like — it will reduce your memory footprint somewhat. Same goes for integer values.
I...
mysql - how many columns is too many?
...
|
edited Jun 24 '16 at 7:46
bubakazouba
1,45022 gold badges1919 silver badges3232 bronze badges
...
Spring Data JPA find by embedded object property
...
|
edited Feb 2 '15 at 1:07
Eddie B
4,51511 gold badge3636 silver badges3838 bronze badges
a...
How to save a git commit message from windows cmd?
...|
edited Aug 15 '17 at 14:23
answered Nov 12 '12 at 8:23
Ik...
How do I ALTER a PostgreSQL table and make a column unique?
...
278
I figured it out from the PostgreSQL docs, the exact syntax is:
ALTER TABLE the_table ADD CON...
Android ClickableSpan not calling onClick
...
answered Dec 28 '11 at 23:30
Marc AttinasiMarc Attinasi
4,54611 gold badge1212 silver badges77 bronze badges
...
