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What is the purpose of Android's tag in XML layouts?
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<merge/> is useful because it can get rid of unneeded ViewGroups, i.e. layouts that are simply used to wrap other views and serve no purpose themselves.
For example, if you were to <include/> a layout from another file without using merge, the two files mig...
How do I drop a foreign key constraint only if it exists in sql server?
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The more simple solution is provided in Eric Isaacs's answer. However, it will find constraints on any table. If you want to target a foreign key constraint on a specific table, use this:
IF EXISTS (SELECT *
FROM sys.foreign_keys
WHERE object_id = O...
How do SQL EXISTS statements work?
...ists' a row in the Order table that meets the condition Suppliers.supplier_id (this comes from Outer query current 'row') = Orders.supplier_id. When you find the first matching row, stop right there - the WHERE EXISTS has been satisfied.
The magic link between the outer query and the subquery lies...
In CSS what is the difference between “.” and “#” when declaring a set of styles?
...yles for an element and what are the semantics that come into play when deciding which one to use?
9 Answers
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How to check which locks are held on a table
...to add comment from @MikeBlandford:
The blocked column indicates the spid of the blocking process. You can run kill {spid} to fix it.
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Can table columns with a Foreign Key be NULL?
I have a table which has several ID columns to other tables.
7 Answers
7
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jQuery - Add ID instead of Class
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Try this:
$('element').attr('id', 'value');
So it becomes;
$(function() {
$('span .breadcrumb').each(function(){
$('#nav').attr('id', $(this).text());
$('#container').attr('id', $(this).text());
$('.stretch_footer').attr('i...
How can I generate a unique ID in Python? [duplicate]
I need to generate a unique ID based on a random value.
8 Answers
8
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Remove by _id in MongoDB console
In the MongoDB console how can I remove a record by id? Here's my collection :
11 Answers
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HTML input - name vs. id [duplicate]
...;input> tag, what is the difference between the use of the name and id attributes especially that I found that they are sometimes named the same?
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