How to Fetch Only Uppercase Values In Oracle?

To fetch only uppercase values in Oracle, you can use the UPPER function in your SQL query. This function will convert all characters in a string to uppercase, allowing you to filter for uppercase values. For example, you can use the following query to fetch only uppercase values from a column named column_name in a table named table_name:

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SELECT column_name
FROM table_name
WHERE column_name = UPPER(column_name);

This query will return only the rows where the value in column_name is in uppercase. You can customize this query further by adding additional conditions or joining with other tables as needed.

What is the command to filter out non-uppercase characters in a column?

One way to filter out non-uppercase characters in a column is by using the following command in SQL:

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SELECT column_name
FROM table_name
WHERE column_name NOT REGEXP '[^A-Z]'

This command selects the column_name from the table_name where the column_name does not contain any characters that are not uppercase letters.

What is the technique for converting lowercase values to uppercase conditionally in Oracle?

One technique for converting lowercase values to uppercase conditionally in Oracle is to use the functions UPPER() and CASE.

Here is an example:

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SELECT 
   CASE
      WHEN condition = 'match' THEN UPPER(column_name)
      ELSE column_name
   END AS uppercase_column
FROM table_name;

In this query, the CASE statement checks the condition and if it matches the specified value, it converts the values of the column to uppercase using the UPPER() function. Otherwise, it returns the original values of the column.

What is the solution for extracting uppercase values in Oracle SQL?

There are several ways to extract uppercase values in Oracle SQL. One common approach is to use the UPPER() function to convert the values to uppercase and then compare them with the original value to see if they are uppercase.

For example, you can use the following query to extract uppercase values from a column called text_column in a table called example_table:

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SELECT text_column
FROM example_table
WHERE text_column = UPPER(text_column);

This query will only return rows where the value in the text_column is already in uppercase.

Another approach is to use the REGEXP_LIKE() function to match only uppercase values. For example, you can use the following query:

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SELECT text_column
FROM example_table
WHERE REGEXP_LIKE(text_column, '^[A-Z]+$');

This query will return rows where the text_column contains only uppercase letters.

These are just a few examples of how you can extract uppercase values in Oracle SQL. Depending on your specific requirements, you may need to modify these queries to suit your needs.

What is the function to check if a value is already in uppercase in Oracle?

The function to check if a value is already in uppercase in Oracle is UPPER() function. You can use this function to convert a value to uppercase and then compare it with the original value to check if it is already in uppercase or not.

Example:

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SELECT CASE WHEN UPPER(column_name) = column_name 
            THEN 'Value is already in uppercase' 
            ELSE 'Value is not in uppercase' 
       END 
FROM table_name;

This query will check if the column_name is already in uppercase and will return the corresponding message.

How to ignore case sensitivity when fetching data in Oracle?

In Oracle, you can ignore case sensitivity when fetching data by using the UPPER() or LOWER() function in your query. These functions will convert the data to uppercase or lowercase, allowing you to compare it without considering the case.

For example, if you want to fetch data where the value of a column is "John" regardless of whether it is uppercase or lowercase, you can use the following query:

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

This query will return all rows where the column value is "John" in any case. You can also use the LOWER() function in a similar way if you want to convert the data to lowercase.

Keep in mind that using these functions may impact the performance of your query, especially if you are fetching a large amount of data. It is recommended to use case-insensitive collation in your database settings if you frequently need to perform case-insensitive comparisons.