Count occurrences of a word in string
Jump to navigation
Jump to search
Counting number of occurrences (or frequency) of a word in string
Excel
- Using the function SUBSTITUTE & LEN functions. demo. Or
- Using the function COUNTIF
MySQL way
SET @paragraph := 'an apple a day keeps the doctor away'; SET @term := 'apple'; SELECT FLOOR((LENGTH(@paragraph) - LENGTH(REPLACE(@paragraph, @term, ''))) / LENGTH(@term)) AS occurrences; /* same with the following query */ SELECT FLOOR((CHAR_LENGTH(@paragraph) - CHAR_LENGTH(REPLACE(@paragraph, @term, ''))) / CHAR_LENGTH(@term)) AS occurrences;
-- Count occurrences of a string: . SET @input = "www.google.com"; SET @separator = "."; SELECT (LENGTH(@input ) - LENGTH(REPLACE(@input , @separator, ""))) / LENGTH(@separator) AS count_of_separator; -- expected result: 2 -- Count occurrences of a string: og SET @input = "www.google.com"; SET @separator = "og"; SELECT (LENGTH(@input ) - LENGTH(REPLACE(@input , @separator, ""))) / LENGTH(@separator) AS count_of_separator; -- expected result: 1
PHP
Using the mb_substr_count (binary safe) or substr_count functions. See details on demo.
$input = 'an apple a day keeps the doctor away'; $term = 'apple'; echo substr_count($input, $term);
BASH
data preparation
- (1) separate each string by return_symbol [1]
- (2) check the uniq command is exists on Cygwin of Win or Linux
- (3) execute the following command sort <file.txt> | uniq -ic | sort -nr[2][3]
file: test.txt
#apple #追劇 #電影 #綜藝 #Apple #藍芽
Result of the execution of command: sort test.txt | uniq -ic | sort -nr insensitive
2 #Apple 1 #電影 1 #追劇 1 #藍芽 1 #綜藝
Result of the execution of command: sort test.txt | uniq -c sensitive
1 #Apple 1 #apple 1 #綜藝 1 #藍芽 1 #追劇 1 #電影
verification of count occurrence
cat test.txt | grep -i "#apple$" | wc -l # or cat test.txt | grep -iw "#apple" | wc -l
Options[4]
- -i means Ignore uppercase vs. lowercase.
- -w means --word-regexp
References
- mysql - Count the number of occurences of a string in a VARCHAR field? - Stack Overflow [Last visited: 2016-09-21]