大约有 40,000 项符合查询结果（耗时：0.0327秒） [XML]
What is the use of the @Temporal annotation in Hibernate?
...on and you want to store precise date/time or both (TIMESTAMP) in database table.
The temporal precision is not specified in core Java APIs. @Temporal is a JPA annotation that converts back and forth between timestamp and java.util.Date. It also converts time-stamp into time. For example, in the s...
Having Django serve downloadable files
...
If you use a table to store file information, including which users should be able to download it, then all you need to send is the primary key, not the filename, and the app decides what to do.
– Edward Newell
...
Performing user authentication in Java EE / JSF using j_security_check
...thenticate users based on username and MD5-hashed passwords in my database table:
http://blog.gamatam.com/2009/11/jdbc-realm-setup-with-glassfish-v3.html
Note: the post talks about a user and a group table in the database. I had a User class with a UserType enum attribute mapped via javax.persiste...
Multiline string literal in C#
... to form a verbatim string literal:
string query = @"SELECT foo, bar
FROM table
WHERE id = 42";
You also do not have to escape special characters when you use this method, except for double quotes as shown in Jon Skeet's answer.
...
What datatype to use when storing latitude and longitude data in SQL databases? [duplicate]
... those fields in mysql to benefit from the fact they are integers:
Create Table: CREATE TABLE `Locations` (
`lat` int(10) unsigned NOT NULL,
`lon` int(10) unsigned NOT NULL,
`location` text,
PRIMARY KEY (`lat`,`lon`) USING BTREE,
KEY `index_location` (`locationText`(30))
) ENGINE=InnoDB D...
What are fixtures in programming?
...
and fixed environment in which tests are run so that results are
repeatable. Some people call this the test context.
Examples of fixtures:
Loading a database with a specific, known set of data
Erasing a hard disk and installing a known clean operating system installation
Copyin...
How can I check the size of a collection within a Django template?
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See https://docs.djangoproject.com/en/stable/ref/templates/builtins/#if : just use, to reproduce their example:
{% if athlete_list %}
Number of athletes: {{ athlete_list|length }}
{% else %}
No athletes.
{% endif %}
...
Reset CSS display property to default value
... the different types of display to revert to (block, inline, inline-block, table-cell, etc).
But, it requires javascript, so if you are looking for a css-only solution, then this is not the solution for you.
Note: This overrides inline styles, but not styles set in css
...
MySQL/Amazon RDS error: “you do not have SUPER privileges…”
...f the data from the dumped server. Use OFF if the intention is to repair a table by copying it within a topology. Use OFF if the intention is to copy a table between replication topologies that are disjoint and will remain so.
So I decided to add --set-gtid-purged=OFF to my mysqldump command and t...
Differences between detach(), hide() and remove() - jQuery
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Imagine a piece of paper on a table with some notes written with pencil.
hide -> throw a clothe onto it
empty -> remove the notes with an eraser
detach -> grab the paper in your hand and keep it there for whatever future plans
remove -> grab...