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Select statement to find duplicates on certain fields
Can you help me with SQL statements to find duplicates on multiple fields?
7 Answers
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How to create and handle composite primary key in JPA
I want to have versions from the same data entry. In other words, I want to duplicate the entry with another version number.
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Determine Whether Two Date Ranges Overlap
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(StartA <= EndB) and (EndA >= StartB)
Proof:
Let ConditionA Mean that DateRange A Completely After DateRange B
_ |---- DateRange A ------|
|---Date Range B -----| _
(True if StartA > EndB)
Let ConditionB Mean that DateRange A ...
Why does Assert.AreEqual(T obj1, Tobj2) fail with identical byte arrays
I have two identical byte arrays in the following segment of code:
6 Answers
6
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What is the difference between connection and read timeout for sockets?
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1) What is the difference between connection and read timeout for sockets?
The connection timeout is the timeout in making the initial connection; i.e. completing the TCP connection handshake. The read timeout is the timeout on waiting to read data1. Specifically, if the server...
Convert pandas dataframe to NumPy array
I am interested in knowing how to convert a pandas dataframe into a NumPy array.
15 Answers
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What is unit testing and how do you do it? [duplicate]
...to a series of tests.
Usually tests are run as separate programs, but the method of testing varies, depending on the language, and type of software (GUI, command-line, library).
Most languages have unit testing frameworks, you should look into one for yours.
Tests are usually run periodically, o...
Using multiple property files (via PropertyPlaceholderConfigurer) in multiple projects/modules
..."true"/>
or
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:dao.properties</value>
<value&g...
Advantages and disadvantages of GUID / UUID database keys
...ad been GUID / UUID values. I've considered going down this path a few times, but there's always a bit of uncertainty, especially around performance and un-read-out-over-the-phone-able URLs.
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Unsigned keyword in C++
...n one of these type modifiers is used by itself, a data type of int is assumed
This means that you can assume the author is using ints.
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