How do I write a query in Oracle ignoring the case of the strings being compared? For example 'angel', 'Angel', 'ANGEL', 'angel', 'AngEl' would all be equal when compared.
Jacob Schoen
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wanna be jaj
6 Answers
If you are matching the full value of the field use
EDIT: From your comment you want to use:
Gary.RayGary.Ray
bendeweybendewey
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You can use:
Otherwise, you can use:
Which will be more efficient if you are looking for a match with no additional characters before or after your_column field as Gary Ray suggested in his comments.
Matthew Watson
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Pablo Santa CruzPablo Santa Cruz
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before comparing the two or more strings first execute the following commands
after those two statements executed then you may compare the strings and there will be case insensitive.for example you had two strings s1='Apple' and s2='apple', if yow want to compare the two strings before executing the above statements then those two strings will be treated as two different strings but when you compare the strings after the execution of the two alter statements then those two strings s1 and s2 will be treated as the same string
reasons for using those two statements
We need to set NLS_COMP=LINGUISTIC and NLS_SORT=BINARY_CI in order to use 10gR2 case insensitivity. Since these are session modifiable, it is not as simple as setting them in the initialization parameters. We can set them in the initialization parameters but they then only affect the server and not the client side.
Smart003Smart003
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More detail on Mr Dredel's answer and tuinstoel's comment.The data in the column will be stored in its specific case, but you can change your session's case-sensitivity for matching.
You can change either the session or the database to use linguistic or case insensitive searching. You can also set up indexes to use particular sort orders.
eg
Once you start getting into non-english languages, with accents and so on, there's additional support for accent-insensitive.Some of the capabilities vary by version, so check out the Globablization document for your particular version of Oracle. The latest (11g) is here
Gary MyersGary Myers
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I don't recall the exact syntax, but you may set the table column to be case insensitive. But be careful because then you won't be able to match based on case anymore and if you WANT 'cool' to not match 'CoOl' it will no longer be possible.
Genia S.Genia S.
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I am getting error: SQL Error [500310] [42601]: Amazon Invalid operation: syntax error at or near 'COLLATE' Position: 239;
a_horse_with_no_name
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meitalemeitale
1 Answer
The default should be case sensitive, as explained in the documentation:
For case-insensitive, use Gordon LinoffGordon Linoff
ilike :
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I want to do a case sensitive search in my SQL query. But by default, SQL Server does not consider the case of the strings.
Any idea on how to do a case sensitive search in SQL query?
marc_s
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Veera
Sql Select Case Sensitive StringVeera
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8 Answers
Can be done via changing the Collation. By default it is case insensitive.
Excerpt from the link:
Or, change the columns to be case sensitive.
Adeel Ansari
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Ashish JainAshish Jain
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By using collation or casting to binary, like this:
The duplication of username/password exists to give the engine the possibility of using indexes. The collation above is a Case Sensitive collation, change to the one you need if necessary.
The second, casting to binary, could be done like this:
Jonas LincolnJonas Lincoln
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You can make the query using convert to varbinary – it’s very easy.Example:
Canned Man
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Juan Carlos VelezJuan Carlos Velez
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SandeepSandeep
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use Latin1_General_CS as your collation in your sql db
blakeblake
Mysql Case Sensitive
In MySQL if You don't want to change the collation and want to perform case sensitive search then just use binary keyword like this:
Sumit JoshiSumit Joshi
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Sql Case Sensitive Search
Just as others said, you can perform a case sensitive search. Or just change the collation format of a specified column as me. For the User/Password columns in my database I change them to collation through the following command:
Gfast2Gfast2
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