大约有 44,000 项符合查询结果（耗时：0.0484秒） [XML]
Difference between two dates in MySQL
...
SELECT TIMEDIFF('2007-12-31 10:02:00','2007-12-30 12:01:01');
-- result: 22:00:59, the difference in HH:MM:SS format
SELECT TIMESTAMPDIFF(SECOND,'2007-12-30 12:01:01','2007-12-31 10:02:00');
-- result: 79259 the differenc...
Extract elements of list at odd positions
...he first element (at position 0, because the indexes are 0-based) would be selected. In this case the second element will be selected.
Because the second element is omitted, the default is being used (the end of the list). So the list is being iterated from the second element to the end.
We also p...
IntelliJ IDEA way of editing multiple lines
...ossibility to edit multiple lines.
Use:
Alt + Shift + Mouse click
for selection. More about this new improvement in IntelliJ blogpost here. Very useful feature.
share
|
improve this answer
...
Truststore and Keystore Definitions
...
It is worth mentioning that KeyStore.load(InputStream is, char[] password) (docs) can take a null password and it then will give access to public certificates. That is, the code that wants to browse a truststore does not need to know it password (for very good reasons!)
...
How can I define a composite primary key in SQL?
...for the table and neither value can be NULL. If you do a query like this:
SELECT * FROM voting WHERE QuestionID = 7
it will use the primary key's index. If however you do this:
SELECT * FROM voting WHERE MemberID = 7
it won't because to use a composite index requires using all the keys from th...
How to select records from last 24 hours using SQL?
...
SELECT *
FROM table_name
WHERE table_name.the_date > DATE_SUB(CURDATE(), INTERVAL 1 DAY)
share
|
improve this answer
...
Update multiple columns in SQL
...
The Update table1 set (a,b,c) = (select x,y,x) syntax is an example of the use of
row-value constructors, Oracle supports this, MSSQL does not. (Connect item)
share
|
...
How to continue a Docker container which has exited
...docker ps -q -l). ;-) Naming can help to better control which container is selected. -l get the last, ok...
– Eric Platon
Feb 21 '14 at 9:01
...
iPhone App Minus App Store?
...w the use of this certificate:
Launch Keychain Access.app. With no items selected, from the Keychain menu select Certificate Assistant, then Create a Certificate.
Name: iPhone Developer
Certificate Type: Code Signing
Let me override defaults: Yes
Click Continue
Validity: 3650 days
Click Contin...
Regular expression to match non-ASCII characters?
What is the easiest way to match non-ASCII characters in a regex? I would like to match all words individually in an input string, but the language may not be English, so I will need to match things like ü, ö, ß, and ñ. Also, this is in Javascript/jQuery, so any solution will need to apply to th...