How to Extract A Value Inside Column In Certain Pattern In Oracle?

To extract a value inside a column in a certain pattern in Oracle, you can use the SUBSTR function along with other string functions like INSTR, REGEXP_SUBSTR, or REGEXP_REPLACE. These functions allow you to specify the starting position and length of the substring you want to extract based on a specific pattern. By using these functions in conjunction with your SQL query, you can extract the desired value from a column in Oracle database according to the specified pattern.

How to extract a number from a text string in Oracle?

One way to extract a number from a text string in Oracle is by using regular expressions. You can use the REGEXP_SUBSTR function to achieve this. Here is an example SQL query that shows how to extract a number from a text string:

1
2

SELECT REGEXP_SUBSTR('Hello123World', '\d+') AS extracted_number
FROM dual;

In this query, the REGEXP_SUBSTR function is used to extract a number from the string 'Hello123World'. The '\d+' regular expression pattern matches one or more digits. As a result, the output of this query will be the extracted number '123'.

You can adjust the regular expression pattern based on the specific format of the text string you are working with.

How to extract a value between parentheses in Oracle?

You can extract a value between parentheses in Oracle by using the SUBSTR function along with the INSTR and LENGTH functions to find the position of the opening and closing parentheses.

Here is an example query:

1
2
3
4
5

SELECT 
   SUBSTR(column_name, 
          INSTR(column_name, '(') + 1, 
          INSTR(column_name, ')') - INSTR(column_name, '(') - 1) AS extracted_value
FROM table_name;

In this query, replace "column_name" with the column that contains the value you want to extract and "table_name" with the name of the table. This query will extract the value between the parentheses.

How to extract text from a column in Oracle?

You can extract text from a column in Oracle by using the SUBSTR function. Here is an example query that demonstrates how to extract text from a column named column_name in a table named table_name:

1
2

SELECT SUBSTR(column_name, start_position, length) AS extracted_text
FROM table_name;

In the above query:

• column_name is the name of the column from which you want to extract text.
• start_position is the starting position from which you want to extract text.
• length is the number of characters you want to extract.

You can adjust the start_position and length parameters based on your specific requirements. You can also use other string manipulation functions in Oracle, such as INSTR and REGEXP_SUBSTR, to extract text from a column in different ways.