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Does a foreign key automatically create an index?
...se through a FK-relationship, you'll often need to lookup a relating table and extract certain rows based on a single value or a range of values.
So it makes good sense to index any columns involved in a FK, but a FK per se is not an index.
Check out Kimberly Tripp's excellent article "When did SQ...
Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
...Easy does) - a first option would be to simply inject the JSON as a String and then take control of the deserialization process:
Collection<COrder> readValues = new ObjectMapper().readValue(
jsonAsString, new TypeReference<Collection<COrder>>() { }
);
You would loose a bit ...
Getting the PublicKeyToken of .Net assemblies
...
Open a command prompt and type one of the following lines according to your Visual Studio version and Operating System Architecture :
VS 2008 on 32bit Windows :
"%ProgramFiles%\Microsoft SDKs\Windows\v6.0A\bin\sn.exe" -T <assemblyn...
'id' is a bad variable name in Python
...emoved it. What a poorly named method! A generic, common name used in thousands of places (where context gives meaning). So someone decided to use it as a global name where there is no context?
– Basic
Jul 26 '16 at 14:27
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How to define Gradle's home in IDEA?
I am trying to import a Gradle project into IntelliJ, and when I get to the Gradle Home textbox, it is not automatically populated, nor will typing in the path of Gradle Home result in a valid location - I have the GRADLE_USER_HOME environment variable set (to what I think is!) the correct pat...
JavaScript blob filename without link
...'s part of HTML5.
Some file formats are considered insecure by the browser and the download fails. Saving JSON files with txt extension works for me.
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How do I remove repeated elements from ArrayList?
I have an ArrayList<String> , and I want to remove repeated strings from it. How can I do this?
38 Answers
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Git rebase --continue complains even when all merge conflicts have been resolved
...urrently being applied to the branch you rebase on. After fixing the patch and doing
git add your/conflicted/file
git status
you will get a (usually green) line showing the modified file
modified: your/conflicted/file
git rebase --continue will work fine in this situation.
Sometimes, h...
ElasticSearch: Unassigned Shards, how to fix?
...er, if you've disabled shard allocation (perhaps you did a rolling restart and forgot to re-enable it), you can re-enable shard allocation.
# v0.90.x and earlier
curl -XPUT 'localhost:9200/_settings' -d '{
"index.routing.allocation.disable_allocation": false
}'
# v1.0+
curl -XPUT 'localhost:92...
Is there a combination of “LIKE” and “IN” in SQL?
...ecause Full Text Search (FTS) is the recommended alternative.
Both Oracle and SQL Server FTS implementations support the CONTAINS keyword, but the syntax is still slightly different:
Oracle:
WHERE CONTAINS(t.something, 'bla OR foo OR batz', 1) > 0
SQL Server:
WHERE CONTAINS(t.something, '"b...