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Do I need to create indexes on foreign keys on Oracle?
...rom a query performance perspective to create a separate index on A.B_ID.
If you ever delete rows in B, you definitely want A.B_ID to be indexed. Otherwise, Oracle will have to do a full table scan on A every time you delete a row from B to make sure that there are no orphaned records (depending o...
Android webview launches browser when calling loadurl
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Does this only work for the initial loading? What if you want to navigate the browser from within the app?
– logicbloke
Dec 22 '17 at 17:08
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What are the risks of running 'sudo pip'?
... In other words, you run arbitrary Python code from the Internet as root. If someone puts up a malicious project on PyPI and you install it, you give an attacker root access to your machine. Prior to some recent fixes to pip and PyPI, an attacker could also run a man in the middle attack to inject ...
“Automatic” vs “Automatic (Delayed start)”
...is Automatic , and the other is Automatic (Delayed start) . What is the difference between these two in detail?
1 Answer
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How can you diff two pipelines in Bash?
How can you diff two pipelines without using temporary files in Bash? Say you have two command pipelines:
3 Answers
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Why does git perform fast-forward merges by default?
...e --no-ff flag causes the merge to always create a new commit object, even if the merge could be performed with a fast-forward. This avoids losing information about the historical existence of a feature branch and groups together all commits that together added the feature.
Jakub Narębski also me...
Format a date using the new date time API
...ds of temporal objects.
JSR-310 has choosen another way, namely to allow different temporal types which consist of type-specific sets of supported built-in fields. The natural consequence is that not every possible field is supported by every type (and users can even define their own specialized fi...
How do I get the path and name of the file that is currently executing?
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BEWARE: This call does not give the same result with different environments. Consider accepting Usagi's answer below: stackoverflow.com/a/6628348/851398
– faraday
Mar 5 '14 at 7:41
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rreplace - How to replace the last occurrence of an expression in a string?
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Very nice! In an unscientific benchmark of replacing the last occurrence of an expression in a typical string in my program (> 500 characters), your solution was three times faster than Alex's solution and four times faster than Mark's solution. T...
Counting DISTINCT over multiple columns
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If you are trying to improve performance, you could try creating a persisted computed column on either a hash or concatenated value of the two columns.
Once it is persisted, provided the column is deterministic and you are ...