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How do I find duplicate values in a table in Oracle?
...
Aggregate the column by COUNT, then use a HAVING clause to find values that appear greater than one time.
SELECT column_name, COUNT(column_name)
FROM table_name
GROUP BY column_name
HAVING COUNT(column_name) > 1;
...
T-SQL: Deleting all duplicate rows but keeping one [duplicate]
...is:
WITH cte AS (
SELECT[foo], [bar],
row_number() OVER(PARTITION BY foo, bar ORDER BY baz) AS [rn]
FROM TABLE
)
DELETE cte WHERE [rn] > 1
Play around with it and see what you get.
(Edit: In an attempt to be helpful, someone edited the ORDER BY clause within the CTE. To be clear, yo...
How can I pass selected row to commandLink inside dataTable or ui:repeat?
...ved for the form submit request. Best is to put the bean in the view scope by @ViewScoped.
You can even pass the entire item object:
<h:commandLink action="#{bean.insert(item)}" value="insert" />
with:
public void insert(Item item) {
// ...
}
On Servlet 2.5 containers, this is also p...
Immutable vs Mutable types
...'bar'
print s # foobar
The value of the variable changes, but it changes by changing what the variable refers to. A mutable type can change that way, and it can also change "in place".
Here is the difference.
x = something # immutable type
print x
func(x)
print x # prints the same thing
x = som...
Do htmlspecialchars and mysql_real_escape_string keep my PHP code safe from injection?
...would allow the attacker to return all the rows.
Or
1 or is_admin=1 order by id limit 1
which produces
SELECT fields FROM table WHERE id=1 or is_admin=1 order by id limit 1
Which allows the attacker to return the first administrator's details in this completely fictional example.
Whilst these...
How do you determine what SQL Tables have an identity column programmatically
...ject_id(TABLE_SCHEMA+'.'+TABLE_NAME), COLUMN_NAME, 'IsIdentity') = 1
order by TABLE_NAME
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Is there a MySQL option/feature to track history of changes to records?
...on. Whilst you can, just about, reconstruct the state of the database just by looking at audit tables, it's hard and error prone, and for any complicated database logic, it becomes unwieldy. For instance, if the business wants to know "find the addresses of the letters we should have sent to custome...
Converting an array of objects to ActiveRecord::Relation
...lizarHristov That's because it's now a relation, which can only be ordered by a column, and not any way you want. Relations are faster to handle large data sets, and there will be some trade-offs.
– Marco Prins
Mar 17 '15 at 9:45
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How to create a date and time picker in Android? [closed]
...I think this response should be updated. The DateSlider library referenced by Rabi all the way below seems to be perfect for this.
– Stephan Branczyk
Aug 7 '11 at 21:09
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How to access parent scope from within a custom directive *with own scope* in AngularJS?
...ally hacky or unmaintainable. For example, I know I could do it right now by taking the $scope from the preLink parameters and iterating over it's $sibling scopes to find the conceptual "parent".
...