How to Return A Substring From A Text In Oracle?

To return a substring from a text in Oracle, you can use the SUBSTR function. The syntax for using the SUBSTR function in Oracle is:

SUBSTR(string, starting_position, length)

Where:

• string is the text from which you want to extract the substring
• starting_position is the position in the string where the extraction should begin
• length is the number of characters to be extracted from the string

For example, if you have a text string 'Hello World' and you want to extract the substring 'World' from it, you can use the following query:

SELECT SUBSTR('Hello World', 7, 5) FROM dual;

This query will return the substring 'World' from the text 'Hello World'. You can adjust the starting position and length parameters in the SUBSTR function according to your specific requirements to extract the desired substring from a text in Oracle.

What is the result of extracting a substring from a text in Oracle?

The result of extracting a substring from a text in Oracle will be a new string containing a portion of the original text. The substring will start at the specified position within the original text and will extend for a specified number of characters (or to the end of the original text if no length is specified). This allows you to extract and manipulate specific portions of text within a larger text value.

How to extract a substring containing a given character in Oracle?

To extract a substring containing a given character in Oracle, you can use the SUBSTR and INSTR functions together.

Here is an example:

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SELECT SUBSTR(column_name, 1, INSTR(column_name, 'desired_character') - 1) AS extracted_string
FROM table_name;

In this query:

• column_name is the name of the column containing the text you want to extract the substring from.
• 'desired_character' is the character you want to use as a reference point for extracting the substring.
• INSTR(column_name, 'desired_character') returns the position of the desired character in the text.
• SUBSTR(column_name, 1, INSTR(column_name, 'desired_character') - 1) extracts the substring from the beginning of the text up to the position of the desired character.

You can adjust the column name, table name, and desired character to fit your specific scenario.

What is the function for retrieving a substring in Oracle?

The function for retrieving a substring in Oracle is SUBSTR().

How to retrieve a substring by specifying the starting and ending points in Oracle?

You can retrieve a substring in Oracle by using the SUBSTR function and specifying the starting point and length of the substring you want to extract. Here is the syntax for using the SUBSTR function to retrieve a substring:

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SELECT SUBSTR(column_name, starting_position, length) 
FROM table_name;

In this syntax:

• column_name is the name of the column from which you want to extract the substring.
• starting_position is the position within the column where the substring extraction should begin. This is 1-based, meaning the first character in the column is at position 1.
• length is the number of characters to include in the substring starting from the starting_position.

For example, if you have a column full_name in a table employees and you want to retrieve the substring of the first name from position 1 to 5, you can use the following query:

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SELECT SUBSTR(full_name, 1, 5) 
FROM employees;

This will return the first 5 characters of the full_name column for each row in the employees table.