MySQL full text search equivalents to Google search
AND
Google search: keyword1 keyword2 same as keyword1 AND keyword2 or keyword1 +keyword2. 
(1) The following is exact words search. (2) Replace column_name with your column name
- Google: 易筋經 AND 吸星大法
- MySQL: column_name REGEXP '易筋經' AND column_name REGEXP '吸星大法'
- MySQL: column_name LIKE '%易筋經%' AND column_name LIKE '%吸星大法%' (online demo[1])
- MySQL: IF(LOCATE('易筋經', column_name) > 0) AND IF(LOCATE('吸星大法, column_name) > 0)
- MySQL: column_name LIKE '%易筋經%吸星大法%' AND column_name LIKE '%吸星大法%易筋經%' Trivial for multiple keywords
OR
Google search: keyword1 OR keyword2
- Google: 易筋經 OR 吸星大法
- MySQL: column_name REGEXP '易筋經' OR column_name REGEXP '吸星大法'
- MySQL: IF(LOCATE('易筋經', column_name) > 0) OR IF(LOCATE('吸星大法, column_name) > 0)
- MySQL: column_name LIKE '%易筋經%' OR column_name LIKE '%吸星大法%' (online demo[2])
NOT
Google search: keyword1 NOT keyword2 same as keyword1 -keyword2
- Google: 易筋經 NOT 吸星大法
- MySQL: column_name REGEXP '易筋經' AND column_name NOT REGEXP '吸星大法' (online demo)
- MySQL: IF(LOCATE('易筋經', column_name) > 0) AND IF(LOCATE('吸星大法, column_name) = 0)
- MySQL: column_name LIKE '%易筋經%' AND column_name NOT LIKE '%吸星大法%'
* wildcard operator
Google * wildcard operator. "Use *, an asterisk character, known as a wildcard, to match one or more words in a phrase" [1] (online demo)
- Google: 狐狸*叫
- MySQL: column_name LIKE '狐狸%叫'[2]
English issue
When the keyword is short and written in English e.g. AI, the query result using column_name LIKE '%AI%' may NOT what you want e.g. Tainan, main, hair and so on.
- (1) Remove all non-alpha-numeric-characters[3] (2) REGEXP word boundaries[4] e.g. (REPLACE(CONVERT(column_name USING ascii), '?', ' ') REGEXP '([[:<:]])AI([[:>:]])')
Cited from MySQL :: MySQL 5.7 Reference Manual :: 12.5.2 Regular Expressions
[[:<:]], [[:>:]] These markers stand for word boundaries. They match the beginning and end of words, respectively. A word is a sequence of word characters that is not preceded by or followed by word characters. A word character is an alphanumeric character in the alnum class or an underscore (_).
Ignore special characters
Ignore return symbol and span tag
- Example:
- Searched the keywords e.g. "意法" site:ptt.cc on Google and found the search result contains 意 & 法 located in the nearest but different rows. 意 is at the end of the n-th row. 法 is at the beginning of n+1-th row [3].
- Approach: (1) remove the html tag (2) remove the return symbol (Carriage return).
Ignore space, Halfwidth and fullwidth symbol (半形字元和全形字元)
- Examples:
- Searched the keywords e.g. "嗎有" on Google and found the search result contains 嗎？ 有 & 嗎- 有.
- Searched the keywords e.g. "人物誌Persona" on Google and found the search result contains 人物誌（Persona）, 人物誌(Persona) & 「人物誌」（persona）.
- Approach: (1) remove the space symbol (2) remove the Halfwidth and fullwidth symbol.
- References: PHP remove symbols from string - Stack Overflow
Highlight search query keywords on resulting pages
Returned result: Show 10 characters before or after the search keywords. (cf: Total 130 ~ 240 characters on Google resulting pages.)
MySQL approach
Input search keywords, and returned the the first occurrence of matched paragraph. Using MySQL SUBSTRING() function, POSITION() function & CHAR_LENGTH() function.
SET @term := "吸星大法";
SET @message := "笑傲江湖中嵩山派掌門左冷禪所創掌法，可發出至陰至寒的真氣。左冷禪與任我行比武時，以此功對付吸星大法，使其全身凍僵、天池穴被封;與岳不群比劍奪帥時，左又使出寒冰神掌，與紫霞神功旗鼓相當、不分勝敗。
原文網址：https://kknews.cc/zh-tw/culture/xzaxbq.html";
SELECT
@message
, CASE
WHEN POSITION(@term IN @message) > 0 THEN SUBSTRING(@message
, IF(
POSITION(@term IN @message) > 0 &&
POSITION(@term IN @message) -10 < 0
, 1
, POSITION(@term IN @message) -10)
, CHAR_LENGTH(@term) + 20
)
ELSE ''
END AS "scrapbook"
-- Returned result of scrapbook column: Show 10 characters before or after the search keywords.
-- 行比武時，以此功對付吸星大法，使其全身凍僵、天池
Instructions:
(1) MySQL POSITION() function - w3resource "MySQL POSITION() returns the position of a substring within a string."
SET @term := "吸星大法"; SET @message := "笑傲江湖中嵩山派掌門左冷禪所創掌法，可發出至陰至寒的真氣。左冷禪與任我行比武時，以此功對付吸星大法，使其全身凍僵、天池穴被封;與岳不群比劍奪帥時，左又使出寒冰神掌，與紫霞神功旗鼓相當、不分勝敗。 原文網址：https://kknews.cc/zh-tw/culture/xzaxbq.html"; SELECT POSITION(@term IN @message) -- > returns 46
(2) Avoid the the start position is 0 or negative. Minimum start position of each paragraph is 1.
SELECT IF(
POSITION(@term IN @message) > 0 &&
POSITION(@term IN @message) -10 < 0
, 1
, POSITION(@term IN @message) -10)
-- > returns 36 = 46 - 10
(3) Show 10 characters before or after the search keywords. MySQL SUBSTRING() function - w3resource"returns a specified number of characters from a particular position of a given string."
SELECT
@message
, CASE
WHEN POSITION(@term IN @message) > 0 THEN SUBSTRING(@message
, IF(
POSITION(@term IN @message) > 0 &&
POSITION(@term IN @message) -10 < 0
, 1
, POSITION(@term IN @message) -10)
, CHAR_LENGTH(@term) + 20
)
ELSE ''
END AS "scrapbook";
-- > returns 行比武時，以此功對付吸星大法，使其全身凍僵、天池
SET @term := "吸星大法";
SET @message := "原文網址：https://kknews.cc/zh-tw/culture/xzaxbq.html";
SELECT
@message
, CASE
WHEN POSITION(@term IN @message) > 0 THEN SUBSTRING(@message
, IF(
POSITION(@term IN @message) > 0 &&
POSITION(@term IN @message) -10 < 0
, 1
, POSITION(@term IN @message) -10)
, CHAR_LENGTH(@term) + 20
)
ELSE ''
END AS "scrapbook"
-- Returned result of scrapbook column: Show 10 characters before or after the search keywords.
-- [EMPTY]
Google sheet approach
Using REGEXEXTRACT function case-sensitive!:
| A | B | |
| 1 | 文章 | 笑傲江湖中嵩山派掌門左冷禪所創掌法，可發出至陰至寒的真氣。左冷禪與任我行比武時，以此功對付吸星大法，使其全身凍僵、天池穴被封;與岳不群比劍奪帥時，左又使出寒冰神掌，與紫霞神功旗鼓相當、不分勝敗。 原文網址：https://kknews.cc/zh-tw/culture/xzaxbq.html |
| 2 | 關鍵字 | 吸星大法 |
| 3 | 搜尋結果摘要 | =IF(ISERROR(REGEXEXTRACT(LOWER(B1), "(.{10}"&B2&".{10})")), "", REGEXEXTRACT(LOWER(B1), "(.{10}"&B2&".{10})")) |
Microsoft Spreadsheet approach
Using FIND, MID & CONCATENATE functions. FIND function is case-sensitive!
| A | B | |
| 1 | 文章 | 笑傲江湖中嵩山派掌門左冷禪所創掌法，可發出至陰至寒的真氣。左冷禪與任我行比武時，以此功對付吸星大法，使其全身凍僵、天池穴被封;與岳不群比劍奪帥時，左又使出寒冰神掌，與紫霞神功旗鼓相當、不分勝敗。 原文網址：https://kknews.cc/zh-tw/culture/xzaxbq.html |
| 2 | 關鍵字 | 吸星大法 |
| 3 | 搜尋結果摘要 | =IF(ISERROR(FIND(B2, B1)), "", CONCATENATE(MID(B1, IF(FIND(B2, B1)-10 >= 1, FIND(B2, B1)-10, 1), 10), MID(B1, FIND(B2, B1), 10+LEN(B2)))) |
PHP approach
PHP solution: php - highlight multiple keywords in search - Stack Overflow Unverified
Ranking factors
Possibile factors
- Google PageRank - Wikipedia
- MySQL POSITION() function - w3resource / MySQL LENGTH() function - w3resource where the keywords located.
to explore strange new worlds / related articles:
- MySQL :: MySQL 5.1 Reference Manual :: 12.5.2 Regular Expressions
- regex - MySQL REGEXP word boundaries and double quotes - Stack Overflow keyin column REGEXP "[[:<:]]word[[:>:]]"
- Google 進階搜尋, Punctuation, symbols & operators in search - Search Help
- Yahoo Advanced Web Search
- Advanced search options of bing
- 在 Excel 或 Google 試算表中，布林搜尋多個關鍵字
- MySQL Fulltext Search 使用方式 | Tsung's Blog 只支援英文
other search cases: if the column ... (inspired by OutWit)
- contains ____
- does not contain ____
- begins with ____
- does not begins with ____
- ends with ____
- does not ends with ____
- equals to ____
- does not equal ____
references
- ↑ Google's * Wildcard Operator - Google Guide
- ↑ Using MySQL LIKE Operator to Select Data Based on Pattern Matching
- ↑ mysql - How to remove all non-alpha numeric characters from a string? - Stack Overflow
- ↑ regex - MySQL REGEXP word boundaries [[:<:]] [[:>:]] and double quotes - Stack Overflow https://stackoverflow.com/questions/18901704/mysql-regexp-word-boundaries-and-double-quotes