大约有 30,000 项符合查询结果（耗时：0.0510秒） [XML]
How do I find duplicates across multiple columns?
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Duplicated id for pairs name and city:
select s.id, t.*
from [stuff] s
join (
select name, city, count(*) as qty
from [stuff]
group by name, city
having count(*) > 1
) t on s.name = t.name and s.city = t.city
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Converting a string to JSON object
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{ "data": [ { id": - you are missing a double quote here, i.e. starting double quote of id
– Kshitij
Jun 11 '12 at 9:23
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CSS selector for a checked radio button's label
... that is checked
works very nicely for the following markup:
<input id="rad1" type="radio" name="rad"/><label for="rad1">Radio 1</label>
<input id="rad2" type="radio" name="rad"/><label for="rad2">Radio 2</label>
... and it will work for any structure, with ...
Jackson and generic type reference
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It works : I did the following: JavaType topMost = mapper.getTypeFactory().constructParametricType(MyWrapper.class, ActualClassRuntime.class); and then did the readValue and it finally worked :)
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PostgreSQL delete all content
....3/static/sql-delete.html
TRUNCATE is a PostgreSQL extension that provides a faster mechanism to
remove all rows from a table. TRUNCATE quickly removes all rows from a
set of tables. It has the same effect as an unqualified DELETE on each
table, but since it does not actually scan the tab...
AlertDialog.Builder with custom layout and EditText; cannot access view
...rence of alertDialog
EditText editText = (EditText) alertDialog.findViewById(R.id.label_field);
Update:
Because in code line dialogBuilder.setView(inflater.inflate(R.layout.alert_label_editor, null));
inflater is Null.
update your code like below, and try to understand the each code line
Ale...
How do I associate file types with an iPhone application?
...at -application:didFinishLaunchingWithOptions: in the app delegate is only called if your app was not backgrounded when it's opened to handle a file.
– memmons
Oct 10 '11 at 18:32
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How do I specify unique constraint for multiple columns in MySQL?
... That way combination of three would be unique? Or all individual three columns would be unique?
– Gary Lindahl
Sep 15 '11 at 0:03
100
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What exactly does git's “rebase --preserve-merges” do (and why?)
... commits.
New branches can be introduced by inserting label commands and calling merge <label>.
And once this mode will have become stable and universally accepted, we can deprecate the design mistake that was --preserve-merges.
Git 2.19 (Q3 2018) improves the new --rebase-merges optio...
Clojure 1.2.1/1.3/1.4 'proxy generated in Grails 2.0.0 runtime fails. 1.2.0 is fine
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I found an Issue called CLJ-944 on clojure.org. There you can find a fix for ClassCastException: clojure.lang.PersistentArrayMap cannot be cast to java.lang.Class issue
The problem is:
that the compiler injects an incorrect cast to
clo...