大约有 3,620 项符合查询结果（耗时：0.0131秒） [XML]
How to change the foreign key referential action? (behavior)
...
Example:
I have a UserDetails table refers to Users table:
mysql> SHOW CREATE TABLE UserDetails;
:
:
`User_id` int(11) DEFAULT NULL,
PRIMARY KEY (`Detail_id`),
KEY `FK_User_id` (`User_id`),
CONSTRAINT `FK_User_id` FOREIGN KEY (`User_id`) REFERENCES `Users` (`User_id`)
:
:
F...
Create Django model or update if exists
...default, from the docs:
Django abstracts the need to use INSERT or UPDATE SQL statements.
Specifically, when you call save(), Django follows this algorithm:
If the object’s primary key attribute is set to a value that evaluates
to True (i.e., a value other than None or the empty string), Django
e...
How to alias a table in Laravel Eloquent queries (or using Query Builder)?
...otected $table = "books";) then how can I make an aliases? (e.g. generated sql: ... FROM books AS A ...)
– Aldi Unanto
Apr 23 '15 at 3:50
...
Why are trailing commas allowed in a list?
...n avoid this by pre-pending the comma. I do that all the time when writing SQL
– Burhan Khalid
Jul 22 '12 at 5:21
38
...
Why are Where and Select outperforming just Select?
...e ended up replacing <1%. And most of those were due to LINQ2EF's poor SQL optimization, rather than being LINQ's fault.
So, like always, write clear and sensible code first, and wait until after you've profiled to worry about micro-optimizations.
...
Maven2: Best practice for Enterprise Project (EAR file)
... `-- Resources.java
| | `-- resources
| | |-- import.sql
| | `-- META-INF
| | |-- beans.xml
| | `-- persistence.xml
| `-- test
| |-- java
| | `-- com
| | `-- foo
| | `-- ...
Sorting related items in a Django template
... looking for? Browse other questions tagged python django django-templates sql-order-by or ask your own question.
What is a servicebus and when do I need one?
...ith its use of queuing technology - your choice of RabbitMQ, MSMQ, Regular SQL Tables, Amazon SQS, Azure Storage Queues, and Azure Service Bus.
share
|
improve this answer
|
...
How to delete duplicates on a MySQL table?
I need to DELETE duplicated rows for specified sid on a MySQL table.
25 Answers
25...
How do I query using fields inside the new PostgreSQL JSON datatype?
...looking for some docs and/or examples for the new JSON functions in PostgreSQL 9.2.
3 Answers
...