大约有 45,000 项符合查询结果（耗时：0.0399秒） [XML]
SCOPE_IDENTITY() for GUIDs?
... INTO dbo.GuidPk (
Col2
)
OUTPUT inserted.ColGuid
INTO @op
VALUES (1)
SELECT * FROM @op
SELECT * FROM dbo.GuidPk
Reference: Exploring SQL 2005’s OUTPUT Clause
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Why does base64 encoding require padding if the input length is not divisible by 3?
... either have to decode 4 bytes at a time or split the string after padding characters. It seems like those implementations just ignore the padding chars, even when they are in the middle of a string.
– Roman
May 30 at 7:02
...
MySQL COUNT DISTINCT
...
Select
Count(Distinct user_id) As countUsers
, Count(site_id) As countVisits
, site_id As site
From cp_visits
Where ts >= DATE_SUB(NOW(), INTERVAL 1 DAY)
Group By site_id
...
MySQL和MongoDB设计实例进行对比 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...并且外观设计是直板的手机，需按照如下方式查询：
SELECT * FROM `mobile_params` WHERE name = '待机时间' AND value > 100;
SELECT * FROM `mobile_params` WHERE name = '外观设计' AND value = '直板';
注：参数表为了方便，把数值和字符串统一保存成字...
Difference between natural join and inner join
...+----------+
The INNER JOIN of TableA and TableB on Column1 will return
SELECT * FROM TableA AS a INNER JOIN TableB AS b USING (Column1);
SELECT * FROM TableA AS a INNER JOIN TableB AS b ON a.Column1 = b.Column1;
+------------+-----------+---------------------+
| a.Column1 | a.Column2 | ...
Are nested transactions allowed in MySQL?
...Y) ENGINE=InnoDB;
START TRANSACTION;
INSERT
INTO t_test
VALUES (1);
SELECT *
FROM t_test;
id
---
1
SAVEPOINT tran2;
INSERT
INTO t_test
VALUES (2);
SELECT *
FROM t_test;
id
---
1
2
ROLLBACK TO tran2;
SELECT *
FROM t_test;
id
---
1
ROLLBACK;
SELECT *
FROM ...
How to check if an option is selected?
...
UPDATE
A more direct jQuery method to the option selected would be:
var selected_option = $('#mySelectBox option:selected');
Answering the question .is(':selected') is what you are looking for:
$('#mySelectBox option').each(function() {
if($(this).is(':selected')) ....
How to make connection to Postgres via Node.js
...values($1, $2)", ['John', x]);
x = x - 1;
}
var query = client.query("SELECT * FROM junk");
//fired after last row is emitted
query.on('row', function(row) {
console.log(row);
});
query.on('end', function() {
client.end();
});
//queries can be executed either via text/parameter val...
“Undefined reference to” template class constructor [duplicate]
...e in order to ensure this problem never happens! (cola<int>, cola<char>, cola<ostream>, cola< cola<int> > ... and so on ...)
The two answers are:
Tell the compiler, at the end of cola.cpp, which particular template classes will be required, forcing it to compile cola...
Change select box option background color
I have a select box and I'm trying to change the background color of the options when the select box has been clicked and shows all the options.
...