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SQL Update with row_number()
...
One more option
UPDATE x
SET x.CODE_DEST = x.New_CODE_DEST
FROM (
SELECT CODE_DEST, ROW_NUMBER() OVER (ORDER BY [RS_NOM]) AS New_CODE_DEST
FROM DESTINATAIRE_TEMP
) x
share
|
im...
Citrix服务器虚拟化：XenApp 6.5发布服务器上的应用程序 - 更多技术 - 清泛...
...的其他应用程序旁边。用户无须了解应用程序在何处以及如何执行。
8) 脱机访问:配置并交付之后，应用程序在断开网络连接后也可供用户使用。
9) 易于灾难恢复:按需应用程序交付对灾难恢复状况而言是一个强大的概念，...
What is the difference between 'protected' and 'protected internal'?
...
The "protected internal" access modifier is a union of both the "protected" and "internal" modifiers.
From MSDN, Access Modifiers (C# Programming Guide):
protected:
The type or member can be accessed only by code in the same class or
struct, or in a class that is...
Where to put include statements, header or source?
...ing things like typedefs for integer sizes and a few common structures and unions [e.g.
typedef union {
unsigned long l;
unsigned short lw[2];
unsigned char lb[4];
} U_QUAD;
(Yes, I know I'd be in trouble if I moved to a big-endian architecture, but since my compiler doesn't allow anonymou...
MySQL: how to get the difference between two timestamps in seconds
...
You could use the TIMEDIFF() and the TIME_TO_SEC() functions as follows:
SELECT TIME_TO_SEC(TIMEDIFF('2010-08-20 12:01:00', '2010-08-20 12:00:00')) diff;
+------+
| diff |
+------+
| 60 |
+------+
1 row in set (0.00 sec)
You could also use the UNIX_TIMESTAMP() function as @Amber suggested in a...
How to initialize a struct in accordance with C programming language standards
...ne to use a designated initializer to initialize members of a structure or union as follows:
MY_TYPE a = { .stuff = 0.456, .flag = true, .value = 123 };
It is defined in paragraph 7, section 6.7.8 Initialization of ISO/IEC 9899:1999 standard as:
If a designator has the form
. identifier
t...
How do I delete from multiple tables using INNER JOIN in SQL server
...(you want to delete) to temporary table
INSERT INTO #DeleteIds(Id)
SELECT DISTINCT mt.MasterTableId
FROM MasterTable mt
INNER JOIN ...
WHERE ...
-- delete from first detail table using join syntax
DELETE d
FROM DetailTable_1 D
INNER JOIN #DeleteIds X
ON D.MasterTableId...
Count Rows in Doctrine QueryBuilder
...
Something like:
$qb = $entityManager->createQueryBuilder();
$qb->select('count(account.id)');
$qb->from('ZaysoCoreBundle:Account','account');
$count = $qb->getQuery()->getSingleScalarResult();
Some folks feel that expressions are somehow better than just using straight DQL. One...
MySQL - length() vs char_length()
... in two bytes. Or UTF-8, where the number of bytes varies. For example:
select length(_utf8 '€'), char_length(_utf8 '€')
--> 3, 1
As you can see the Euro sign occupies 3 bytes (it's encoded as 0xE282AC in UTF-8) even though it's only one character.
...
MySQL join with where clause
...
You need to put it in the join clause, not the where:
SELECT *
FROM categories
LEFT JOIN user_category_subscriptions ON
user_category_subscriptions.category_id = categories.category_id
and user_category_subscriptions.user_id =1
See, with an inner join, putting a claus...