大约有 42,000 项符合查询结果（耗时：0.0522秒） [XML]
SQL WHERE ID IN (id1, id2, …, idn)
I need to write a query to retrieve a big list of ids.
9 Answers
9
...
MySQL Cannot drop index needed in a foreign key constraint
...the index: ALTER TABLE mytable ADD CONSTRAINT mytable_ibfk_1 FOREIGN KEY (AID) REFERENCES mytable_a (ID) ON DELETE CASCADE;
– laffuste
Feb 11 '14 at 7:49
8
...
Many-to-many relationship with the same model in rails?
...the schema for that:
create_table "post_connections", :force => true, :id => false do |t|
t.integer "post_a_id", :null => false
t.integer "post_b_id", :null => false
end
By default, Rails will call this table a combination of the names of the two tables we're joining. But that wou...
Launch Bootstrap Modal on page load
...
Just wrap the modal you want to call on page load inside a jQuery load event on the head section of your document and it should popup, like so:
JS
<script type="text/javascript">
$(window).on('load',function(){
$('#myModal').modal('show');
});
</scrip...
java.lang.OutOfMemoryError: bitmap size exceeds VM budget - Android
I developed an application that uses lots of images on Android.
13 Answers
13
...
How to generate the JPA entity Metamodel?
...cessor.
Hibernate as a dependency
<dependency>
<groupId>org.hibernate.orm</groupId>
<artifactId>hibernate-jpamodelgen</artifactId>
<version>${version.hibernate-jpamodelgen}</version>
<scope>provided</scope>
<...
How to check if element exists using a lambda expression?
...I have TabPane, and I would like to know if there is element with specific ID in it.
3 Answers
...
List of zeros in python [duplicate]
...tertools.repeat and [0] * n will create lists whose elements refer to same id. This is not a problem with immutable objects like integers or strings but if you try to create list of mutable objects like a list of lists ([[]] * n) then all the elements will refer to the same object.
a = [[]] * 10
a...
PowerShell: Setting an environment variable for a single command only
...$pre} else {Remove-Item env:\foo}... some might say unwieldy, but will avoid side effects...
– Lucas
Jun 21 '17 at 21:32
add a comment
|
...
Render HTML to PDF in Django site
...R MY CONTENT
{% endfor %}
</div>
<div id="footerContent">
{%block page_foot%}
Page <pdf:pagenumber>
{%endblock%}
</div>
</body>
</html>
Hope it helps.
...