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SQL join: selecting the last records in a one-to-many relationship
Suppose I have a table of customers and a table of purchases. Each purchase belongs to one customer. I want to get a list of all customers along with their last purchase in one SELECT statement. What is the best practice? Any advice on building indexes?
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PostgreSQL: How to change PostgreSQL user password?
How do I change the password for PostgreSQL user?
17 Answers
17
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Batch renaming files with Bash
How can Bash rename a series of packages to remove their version numbers? I've been toying around with both expr and %% , to no avail.
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How to get the path of a running JAR file?
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return new File(MyClass.class.getProtectionDomain().getCodeSource().getLocation()
.toURI()).getPath();
Replace "MyClass" with the name of your class.
Obviously, this will do odd things if your class was loaded from a non-file location.
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How to sign an android apk file
I am trying to sign my apk file. I can't figure out how to do it. I can't find good in-depth directions. I have very little programing experience, so any help would be appreciated.
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How do I access properties of a javascript object if I don't know the names?
Say you have a javascript object like this:
8 Answers
8
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Use rvmrc or ruby-version file to set a project gemset with RVM?
I use RVM, the Ruby Version Manager to specify a Ruby version and a set of gems for each of my Rails projects.
5 Answers
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Graph Algorithm To Find All Connections Between Two Arbitrary Vertices
I am trying to determine the best time efficient algorithm to accomplish the task described below.
16 Answers
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How to declare variable and use it in the same Oracle SQL script?
... need to declare some variables at the beginning and reuse them in the script, such as:
10 Answers
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Remove Last Comma from a string
Using JavaScript, how can I remove the last comma, but only if the comma is the last character or if there is only white space after the comma? This is my code.
I got a working fiddle . But it has a bug.
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