Extract left part of field with regexp_substr after two specific charaters

What does REGEXP_SUBSTR () do in SQL?

Returns characters from a string by searching it for a regular expression pattern. REGEXP_SUBSTR is similar to the SUBSTRING function function, but lets you search a string for a regular expression pattern. For more information about regular expressions, see POSIX operators.

What is the regular expression to extract substring from string Oracle?

The Oracle REGEXP_SUBSTR() function is an advanced version of the SUBSTR() function that allows you to search for substrings based on a regular expression. Instead of returning the position of the substring, it returns a portion of the source string that matches the regular expression.

What is REGEXP_SUBSTR in Oracle 10g?

The Oracle/PLSQL REGEXP_SUBSTR function is an extension of the SUBSTR function. This function, introduced in Oracle 10g, will allow you to extract a substring from a string using regular expression pattern matching.

How to extract string between two characters in Oracle?

Use a SUBSTR() function. The first argument is the string or the column name. The second argument is the index of the character at which the substring should begin.

How to get last 2 digits of a number in Oracle?

select column_name, to_number(regexp_substr(column_name,’\d+$’)) from table_name;

1. \d matches digits. Along with +, it becomes a group with one or more digits.
2. $ matches end of line.
3. Putting it together, this regex extracts a group of digits at the end of a string.

How do I extract a string after a specific character?

To get text following a specific character, you use a slightly different approach: get the position of the character with either SEARCH or FIND, subtract that number from the total string length returned by the LEN function, and extract that many characters from the end of the string.
 

How do I extract part of a string?

The substr() method extracts a part of a string. The substr() method begins at a specified position, and returns a specified number of characters. The substr() method does not change the original string. To extract characters from the end of the string, use a negative start position.

How do I extract part of a text string?

To extract a substring of a certain length from anywhere in the middle of a string, use the MID function. Here in this example, I enter =MID(A2,6,4) to extract four characters starting from the 6th character of the product code.

What is the purpose of Regexp_count?

Searches a string for a regular expression pattern and returns an integer that indicates the number of times the pattern occurs in the string. If no match is found, then the function returns 0. For more information about regular expressions, see POSIX operators.

What does \\ s+ mean in RegEx?

The plus sign + is a greedy quantifier, which means one or more times. For example, expression X+ matches one or more X characters. Therefore, the regular expression \s matches a single whitespace character, while \s+ will match one or more whitespace characters.
 

What is the difference between Instr and REGEXP_INSTR?

The REGEXP_INSTR function is similar to the INSTR function except that it finds the location of a pattern of characters, specified with a regular expression, instead of finding the location of a simple string literal.