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How to delete duplicates on a MySQL table?
I need to DELETE duplicated rows for specified sid on a MySQL table.
25 Answers
25...
Django optional url parameters
...foo),
)
Keep in mind that in your view you'll also need to set a default for the optional URL parameter, or you'll get an error:
def foo(request, optional_parameter=''):
# Your code goes here
share
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How to Store Historical Data
... I got into a debate on the best way to store historical data. Currently, for some systems, I use a separate table to store historical data, and I keep an original table for the current, active record. So, let's say I have table FOO. Under my system, all active records will go in FOO, and all his...
Jdbctemplate query for string: EmptyResultDataAccessException: Incorrect result size: expected 1, ac
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In JdbcTemplate , queryForInt, queryForLong, queryForObject all such methods expects that executed query will return one and only one row. If you get no rows or more than one row that will result in IncorrectResultSizeDataAccessException . Now the ...
SQL Server add auto increment primary key to existing table
...explicitly specify the seed and increment in your SQL scripts - especially for a larger site. It's just good practice.
– marc_s
Oct 28 '15 at 13:59
1
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Get the last inserted row ID (with SQL statement) [duplicate]
...port.microsoft.com/kb/2019779 - the fix was first made available last week for 2008 R2 SP1 CU5. In all earlier versions, the workarounds are to set maxdop to 1, keep a fixed plan that happens to not use parallelism (I have not tested this), or use the output clause.
– Aaron Ber...
Android Layout with ListView and Buttons
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I think this is what you are looking for.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<Button a...
Delete ActionLink with confirm dialog
...lete this article?');" }) %>
The overloaded method you're looking for is this one:
public static MvcHtmlString ActionLink(
this HtmlHelper htmlHelper,
string linkText,
string actionName,
Object routeValues,
Object htmlAttributes
)
http://msdn.microsoft.com/en-us/libra...
Select last row in MySQL
... 20m rows and it was very fast. I assume there's some kind of special case for handling this query. (EDIT: MySQL 5.7, InnoDB engine)
– Daniel Buckmaster
Oct 29 '18 at 2:20
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JPA: unidirectional many-to-one and cascading delete
...elation from the parent to the child (not just the opposite).
You'll therefore need to do this:
Either, change the unidirectional @ManyToOne relationship to a bi-directional @ManyToOne, or a unidirectional @OneToMany. You can then cascade REMOVE operations so that EntityManager.remove will remove...