How to Get Case Insensitive Records From Oracle?

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To get case insensitive records from Oracle, you can use the UPPER() or LOWER() functions in your query. By applying these functions to the column you want to search, you can ensure that the query is not case sensitive. For example, you can use a query like this: SELECT * FROM table_name WHERE UPPER(column_name) = UPPER('search_value'); This query will return records where the column_value matches the search_value regardless of the case.

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What is the standard practice for performing case insensitive searches in Oracle?

The standard practice for performing case insensitive searches in Oracle is to use the UPPER or LOWER functions to convert the search string and the column value to the same case before comparing them.


For example, the query would look something like this:

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SELECT *
FROM table_name
WHERE UPPER(column_name) = UPPER('search_string');


Alternatively, you can also use the COLLATE clause in Oracle to specify a case-insensitive collation for the column in the query:

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SELECT *
FROM table_name
WHERE column_name = 'search_string' COLLATE BINARY_CI;


This will ensure that the search is case-insensitive and return the desired results regardless of the case of the characters in the search string or the column value.


How to configure Oracle to perform case insensitive comparisons?

To configure Oracle to perform case-insensitive comparisons, you can use the Oracle function UPPER() or LOWER() to convert the values to either all uppercase or all lowercase before performing the comparison.


For example, you can use the UPPER() function in the WHERE clause like this:

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SELECT * FROM table_name WHERE UPPER(column_name) = UPPER('search_value');


Alternatively, you can set the NLS_SORT parameter to a case-insensitive value like BINARY_CI or GENERIC_M_CI. This can be done using the following query:

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ALTER SESSION SET NLS_SORT=BINARY_CI;


It's important to note that changing the NLS_SORT parameter may impact the sorting behavior of other queries in your database, so be sure to test thoroughly before deploying this change.


How to enable case insensitivity in Oracle for string comparisons?

In Oracle, you can enable case insensitivity for string comparisons by changing the default collation of the database to a case insensitive one. You can do this by altering the database character set to a case-insensitive one such as AL32UTF8 or WE8MSWIN1252.


Here are the steps to enable case insensitivity in Oracle for string comparisons:

  1. Log in to your Oracle database as a user with DBA privileges.
  2. Check the current default collation of the database by running the following query:
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SELECT VALUE FROM NLS_DATABASE_PARAMETERS WHERE PARAMETER = 'NLS_CHARACTERSET';


  1. If the default character set is case sensitive, you can change it to a case-insensitive one by altering the database character set. For example, to change the character set to AL32UTF8, you can use the following command:
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ALTER DATABASE CHARACTER SET AL32UTF8;


  1. Restart the Oracle database for the changes to take effect.
  2. Once the database restarts, case insensitivity will be enabled for string comparisons in Oracle.


Now you can perform case-insensitive string comparisons in your queries by using the UPPER() or LOWER() functions to convert the strings to uppercase or lowercase before comparing them. For example:

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SELECT * FROM table_name WHERE UPPER(column_name) = UPPER('SearchString');


By following these steps, you can enable case insensitivity in Oracle for string comparisons.


How to perform a case insensitive search in Oracle?

To perform a case-insensitive search in Oracle, you can use the UPPER or LOWER function to convert both the search term and the column value to the same case before comparing them. Here is an example:

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SELECT * FROM table_name
WHERE UPPER(column_name) = UPPER('search_term');


In this query, the UPPER function is used to convert both the column value and the search term to uppercase, making the comparison case-insensitive. You can also use the LOWER function if you prefer to convert them to lowercase instead.


How to ignore case sensitivity when querying records from Oracle?

You can ignore case sensitivity when querying records from Oracle by using the UPPER() or LOWER() functions to convert the values to uppercase or lowercase before comparing them.


For example:

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SELECT * 
FROM table_name
WHERE UPPER(column_name) = UPPER('value');


This will convert both the column value and the search value to uppercase before comparison, effectively ignoring case sensitivity.

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