How to Get Partial String In Oracle?

To get a partial string in Oracle, you can use the SUBSTR function. This function takes three arguments: the original string, the starting position of the substring you want to extract, and the length of the substring. For example, if you have a string 'Hello World' and you want to extract only the word 'Hello', you can use the SUBSTR function like this: SUBSTR('Hello World', 1, 5). This will return 'Hello'. Using the SUBSTR function allows you to extract a specific portion of a string in Oracle databases.

What is the function to remove certain characters from a string in Oracle?

The function in Oracle to remove certain characters from a string is called TRANSLATE.

Syntax:

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TRANSLATE(input_string, characters_to_remove, '')

Example:

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SELECT TRANSLATE('hello123world456', '123456', '') FROM dual;

Output:

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helloworld

How to find and extract a specific pattern from a string in Oracle?

To find and extract a specific pattern from a string in Oracle, you can use the REGEXP_SUBSTR function. This function allows you to search for a specific regular expression pattern within a string and extract the matched substring.

Here's an example of how you can use REGEXP_SUBSTR to find and extract a specific pattern from a string in Oracle:

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SELECT REGEXP_SUBSTR('This is a test string 1234', '\d+') AS extracted_pattern
FROM dual;

In this example, the regular expression pattern '\d+' is used to match any sequence of digits in the input string 'This is a test string 1234'. The REGEXP_SUBSTR function will return the matched substring '1234'.

You can customize the regular expression pattern to match different types of patterns or characters in the input string. The REGEXP_SUBSTR function also allows you to specify additional parameters such as the starting position and occurrence of the pattern to extract.

By using the REGEXP_SUBSTR function in Oracle, you can easily find and extract specific patterns from strings in your database queries.

How to retrieve last 4 characters of a string in Oracle?

To retrieve the last 4 characters of a string in Oracle, you can use the SUBSTR function with a negative value as the second parameter to specify the number of characters from the end of the string.

Here is an example query to retrieve the last 4 characters of a string:

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SELECT SUBSTR('your_string', -4) AS last_4_chars
FROM dual;

Replace 'your_string' with the actual string you want to extract the last 4 characters from. This query will return the last 4 characters of the string in the result set.

How to get characters between two delimiters in Oracle?

You can use the SUBSTR and INSTR functions to get the characters between two delimiters in Oracle. Here is an example:

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SELECT SUBSTR(your_column, 
              INSTR(your_column, 'first_delimiter') + LENGTH('first_delimiter'),
              INSTR(your_column, 'second_delimiter') - INSTR(your_column, 'first_delimiter') - LENGTH('first_delimiter')) AS characters_between_delimiters
FROM your_table;

In this example, your_column is the column from which you want to extract the characters between the delimiters, and your_table is the table that contains the column. Replace 'first_delimiter' and 'second_delimiter' with the actual delimiters you are using.

The INSTR function is used to find the position of the delimiters within the string, and the SUBSTR function is used to extract the characters between the delimiters based on their positions.

What is the function to get partial string starting from a specific position in Oracle?

The SUBSTR function in Oracle can be used to get a partial string starting from a specific position. The syntax for the SUBSTR function is:

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SUBSTR(string, starting_position, length)

Where:

• string is the input string from which the substring will be extracted
• starting_position is the position in the input string where the substring extraction will start
• length is the number of characters to be extracted from the input string starting from the specified position

For example, if we have a string 'Hello World' and we want to extract a substring starting from the 6th position to the end of the string, we can use the following query:

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SELECT SUBSTR('Hello World', 6) FROM dual;

This will return 'World' as the result.