大约有 3,551 项符合查询结果（耗时：0.0191秒） [XML]
How to get multiple counts with one SQL query?
... Thanks for this very elegant solution. Btw, this also works with TSQL.
– Annie Lagang
Sep 9 '16 at 0:52
7
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How to generate .json file with PHP?
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Here is a sample code:
<?php
$sql="select * from Posts limit 20";
$response = array();
$posts = array();
$result=mysql_query($sql);
while($row=mysql_fetch_array($result)) {
$title=$row['title'];
$url=$row['url'];
$posts[] = array('title'=> ...
How do you deploy your ASP.NET applications to live servers?
...base
For keeping databases in sync I use http://www.red-gate.com/products/sql-development/sql-compare/
If server is behind bunch of routers and you can't directly connect (which is requirement of SQL Compare), use https://secure.logmein.com/products/hamachi2/ to create VPN.
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Multiple “order by” in LINQ
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The only downside to using the SQL syntax for Linq is that not all of the functions are supported, most but not all
– Joshua G
Jul 19 '15 at 19:09
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The SQL OVER() clause - when and why is it useful?
...uck 2005 Green
5678ASDF Ford Mustang 2008 Yellow
Run below SQL
SELECT VIN,
MAKE,
MODEL,
YEAR,
COLOR ,
COUNT(*) OVER (PARTITION BY YEAR) AS COUNT2
FROM DIM_EQUIPMENT
The result would be as below
VIN MAKE MODEL YEAR COLOR COUNT2
----------------------...
MySQL - force not to use cache for testing speed of query
I'm testing the speed of some queries in MySQL. The database is caching these queries making it difficult for me to get reliable results when testing how fast these queries are.
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INSERT with SELECT
...HASULTANTEMURI Different question. But if I understand what you're asking, SQL Server (not what was asked, but what I use these days) has the OUTPUT clause, which lets you put whatever you inserted into another table also. I don't think MySQL has an equivalent. You might create a temporary table, se...
Database cluster and load balancing
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Postgresql docs refer to "database cluster" differently: "Before you can do anything, you must initialize a database storage area on disk. We call this a database cluster. (SQL uses the term catalog cluster.) A database cluster is a...
When to use Hadoop, HBase, Hive and Pig?
...ities on top of an existing Hadoop cluster. Along with that it provides an SQL like interface which makes your work easier, in case you are coming from an SQL background. You can create tables in Hive and store data there. Along with that you can even map your existing HBase tables to Hive and opera...
SQL UPDATE all values in a field with appended string CONCAT not working
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That's pretty much all you need:
mysql> select * from t;
+------+-------+
| id | data |
+------+-------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(dat...