You can view EDUCBA’s recommended articles for more information.DELIMITER // CREATE PROCEDURE splitString ( IN inputString text, IN delimiterChar CHAR ( 1 ) ) BEGIN DROP TEMPORARY TABLE IF EXISTS temp_string CREATE TEMPORARY TABLE temp_string ( vals text ) WHILE LOCATE ( delimiterChar, inputString ) > 1 DO INSERT INTO temp_string SELECT SUBSTRING_INDEX ( inputString, delimiterChar, 1 ) SET inputString = REGEXP_REPLACE ( inputString, ( SELECT LEFT ( inputString, LOCATE ( delimiterChar, inputString )) ), '', 1, 1 ) END WHILE INSERT INTO temp_string ( vals ) VALUES ( inputString ) SELECT TRIM ( vals ) FROM temp_string END // DELIMITER We hope that this EDUCBA information on “MySQL SUBSTRING_INDEX()” was beneficial to you. The article also contains screenshots of the outputs of each query on the output console that will give a clear picture to the reader. We have tried to explain the function with examples. We have also learned about the negative and positive numbers and their working. In this article, we have also learned about its parameters like number (N). We have learned how the function works and returns a substring or a part of a string, either an entire string or a definite part. This article taught us about the mysql substring_index() function. Versions of MySQL that have substring_index functionīelow mentioned mysql versions have substring_index() function: Therefore, the substring_index() function first scans the entire string from the left-hand side since the number is positive and stops the scanning where the function will encounter its first ‘oo’ and outputs the extracted string as substring as a result on the output console. In the above example, the source string is “a delimiter is ‘oo’ which acts as a separator which is a combination of characters, and the N, which is an integer, acts as a counter variable is 1, which means it is searching for the first occurrence of ‘oo’ together in the given string. The below example will explain the concept of passing more than one character as a delimiter in the function. Note: We can also pass more than one character as a delimiter in the function. Nothing will be displayed as 0 is passed in the number parameter. Example #6Ĭode: select substring_index('Tutorial class','s',-2) Therefore, the substring_index() function first scans the entire string from the right-hand side since the number is negative and stops the scanning where the function will encounter its second ‘a’ and outputs the extracted string as substring as a result on the output console. In the above example, the source string is “Tutorial class”, the delimiter is ‘a’, which acts as a separator, and the N, which is an integer, acts as a counter variable is -2, which means it is searching for the first occurrence of ‘r’ in the given string. Example #4Ĭode: select substring_index('Tutorial class','a',-1) Ĭode: select substring_index('Tutorial class','a',-2) A negative number scans the string for the occurrence of the separator from the right-hand side. Therefore, the substring_index() function first scans the entire string from left since the number is positive and stops the scanning where the function will encounter its first ‘r’ and outputs the extracted string as substring as a result on the output console.Ĭode: select substring_index('Tutorial class','l',2) Ĭode: select substring_index('Tutorial class','a',1) ĭemonstration of substring_index() function by passing a negative number as a parameter in the function. In the above example, the source string is “Tutorial class”, a delimiter is ‘r’ which acts as a separator, and the which is an integer acts as a counter variable is 1, which means it is searching for the first occurrence of ‘r’ in the given string. If N is negative, the function outputs every character of the string from right till N number of occurrences of the delimiter.įollowing are the examples are given below:Ĭode: select substring_index('Tutorial class','r',1) If n is positive, the function outputs every character of string from the left of the string till N number of occurrences of the delimiter. The integer N can be negative or positive.
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