大约有 47,000 项符合查询结果（耗时：0.0538秒） [XML]
How to retrieve POST query parameters?
... parameter handling (qs) rather than the low-level querystring library. In order to parse repeated parameters with qs, the parameter needs to have brackets: name[]=val1&name[]=val2. It also supports nested maps. In addition to parsing HTML form submissions, the bodyParser can parse JSON requests...
SQL select only rows with max value on a column [duplicate]
...ELECT id, rev, contents,
ROW_NUMBER() OVER (PARTITION BY id ORDER BY rev DESC) rank
FROM YourTable) a
WHERE a.rank = 1
Added in SQL standard ANSI/ISO Standard SQL:2003 and later extended with ANSI/ISO Standard SQL:2008, window (or windowing) functions are available with...
How can I combine multiple rows into a comma-delimited list in Oracle? [duplicate]
..._name , ','), 2) csv
FROM (SELECT country_name , ROW_NUMBER () OVER (ORDER BY country_name ) rn,
COUNT (*) OVER () cnt
FROM countries)
WHERE rn = cnt
START WITH rn = 1
CONNECT BY rn = PRIOR rn + 1;
CSV ...
SQL JOIN - WHERE clause vs. ON clause
...
They are not the same thing.
Consider these queries:
SELECT *
FROM Orders
LEFT JOIN OrderLines ON OrderLines.OrderID=Orders.ID
WHERE Orders.ID = 12345
and
SELECT *
FROM Orders
LEFT JOIN OrderLines ON OrderLines.OrderID=Orders.ID
AND Orders.ID = 12345
The first will return an order ...
Numbering rows within groups in a data frame
...r) and library(dplyr) answers to make the ranking val column in descending order?
– Przemyslaw Remin
Jul 24 '18 at 9:31
|
show 4 more commen...
How to intercept click on link in UITextView?
...ith Swift 5 and iOS 12, you can use one of the three following patterns in order to interact with links in a UITextView.
#1. Using UITextView's dataDetectorTypes property.
The simplest way to interact with phone numbers, urls or addresses in a UITextView is to use dataDetectorTypes property. The...
How to store a command in a variable in a shell script?
...
Be Careful registering an order with the: X=$(Command)
This one is still executed
Even before being called.
To check and confirm this, you cand do:
echo test;
X=$(for ((c=0; c<=5; c++)); do
sleep 2;
done);
echo note the 5 seconds elapsed
...
Are there any SHA-256 javascript implementations that are generally considered trustworthy?
...ssword becomes irrelevant. An attacker needs only to intercept the hash in order to impersonate the user, and if that hash is stored unmodified on the server, then the server is storing the true password (the hash) in plain-text.
So your security is now worse because you decided add your own improv...
Grouped LIMIT in PostgreSQL: show the first N rows for each group?
I need to take the first N rows for each group, ordered by custom column.
5 Answers
5
...
What is “with (nolock)” in SQL Server?
...r 2005, so the support for NOLOCK exists if you are using that version. In order to future-proof you code (assuming you've decided to use dirty reads) you could use this in your stored procedures:
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED