大约有 12,000 项符合查询结果（耗时：0.0266秒） [XML]
SQL query for finding records where count > 1
...9-12-14'),
(2,789,77777,'2009-12-14'),
(2,789,77777,'2009-12-14');
select foo.user_id, foo.cnt from
(select user_id,count(account) as cnt, dt from payment group by account, dt) foo
where foo.cnt > 1;
share
|
...
How to convert a ruby hash object to JSON?
...
You can also use JSON.generate:
require 'json'
JSON.generate({ foo: "bar" })
=> "{\"foo\":\"bar\"}"
Or its alias, JSON.unparse:
require 'json'
JSON.unparse({ foo: "bar" })
=> "{\"foo\":\"bar\"}"
share
...
Import CSV to SQLite
..."separator ," into ".mode csv". So you could try:
sqlite> create table foo(a, b);
sqlite> .mode csv
sqlite> .import test.csv foo
The first command creates the column names for the table. However, if you want the column names inherited from the csv file, you might just ignore the first li...
Deleting an object in java?
...n by the garbage collector.
myObject = null may not do it; for example:
Foo myObject = new Foo(); // 1 reference
Foo myOtherObject = myObject; // 2 references
myObject = null; // 1 reference
All this does is set the reference myObject to null, it does not affect the object myObject once pointed...
What's the yield keyword in JavaScript?
...: Generators" by James Long for the official Harmony standard:
function * foo(x) {
while (true) {
x = x * 2;
yield x;
}
}
"When you call foo, you get back a Generator object which has a next
method."
var g = foo(2);
g.next(); // -> 4
g.next(); // -> 8
g.next()...
ALTER TABLE to add a composite primary key
...ing queries:
A) SELECT person, place, thing FROM provider WHERE person = 'foo' AND thing = 'bar';
B) SELECT person, place, thing FROM provider WHERE person = 'foo' AND place = 'baz';
C) SELECT person, place, thing FROM provider WHERE person = 'foo' AND place = 'baz' AND thing = 'bar';
D) SELECT per...
How does the vim “write with sudo” trick work?
...ointing out that this does not evaluate to the filename). For example, :%s/foo/bar means "in the current file, replace occurrences of foo with bar." If you highlight some text before typing :s, you'll see that the highlighted lines take the place of % as your substitution range.)
:w isn't updating ...
Which characters are valid in CSS class names/selectors?
...
@Adamarla <p class="foo bar"> adds two classes to the p element: foo, and bar. There is no way (that I can think of) to add a classname containing whitespace to an HTML element. The information on how to escape whitespace characters was inclu...
How do I get the number of days between two dates in JavaScript?
... var hours = minutes*60;
var days = hours*24;
var foo_date1 = getDateFromFormat("02/10/2009", "M/d/y");
var foo_date2 = getDateFromFormat("02/12/2009", "M/d/y");
var diff_date = Math.round((foo_date2 - foo_date1)/days);
alert("Diff date i...
How to dynamically build a JSON object with Python?
...t;>> from easydict import EasyDict as edict
>>> d = edict({'foo':3, 'bar':{'x':1, 'y':2}})
>>> d.foo
3
>>> d.bar.x
1
>>> d = edict(foo=3)
>>> d.foo
3
[INSTALLATION]:
pip install easydict
...