I have a problem with the MATCH AGAINST query. i am getting 0 result in query when i pass onlu numeric value here is my query :
SELECT * FROM tbl1 WHERE MATCH(Sub_Name) AGAINST('+praga*' IN BOOLEAN MODE) AND MATCH(Sub_Address) AGAINST('+203*' IN BOOLEAN MODE) // result 0 row found
SELECT * FROM tbl1 WHERE MATCH(Sub_Name) AGAINST('+praga*' IN BOOLEAN MODE) AND MATCH(Sub_Address) AGAINST('+203 s*' IN BOOLEAN MODE) // result found
when i use any numeric in (203) then i get 0 result but i use any char with 203 s then result found,
and my address field value is "203 surat"
its because wildcard * IN BOOLEAN MODE returns matches that start with the word they are appended to. In your case no word starts with 203 I suppose. Hence you have to specify the word/letter which acts as a starting part of the Match. in your case 'S'
Refer The asterisk serves as the truncation (or wildcard) operator. Unlike the other operators, it should be appended to the word to be affected. Words match if they begin with the word preceding the * operator.
Related
as everyone knows LIKE is too slow, but when I try to use MATCH AGAINST instead, its useless.
I need some operand that give the result such as LIKE '%part%' When "part" is part of the word not a complete word.
I have already tried
SELECT * FROM `table` WHERE MATCH (title) AGAINST ('*part*' IN BOOLEAN MODE)
SELECT * FROM `table` WHERE MATCH (title) AGAINST ('+*part*' IN BOOLEAN MODE)
and its not working
any solution?
You can only match words with a wildcard from the beginning of the word. As the documentation explains:
*
The asterisk serves as the truncation (or wildcard) operator. Unlike
the other operators, it is appended to the word to be affected. Words
match if they begin with the word preceding the * operator.
I know how to get all results which contain a few words:
SELECT * FROM `table` WHERE MATCH (`row`) AGAINST ('+word1 +word2' IN BOOLEAN MODE)
But how I can all results which not contain words: "word1", "word2" ?? I need operator, something like "NOT IN". So how I can get from database everything records which not contain specific words in query using full text search?
Thanks.
You can just use NOT to negate the condition:
SELECT * FROM `table` WHERE NOT MATCH (`row`) AGAINST ('+word1 +word2' IN BOOLEAN MODE)
The MATCH condition is true on rows where it finds the words, and false where it does not find the words. Use NOT reverses the true/false result on each row.
Just like:
SELECT * FROM `table` WHERE NOT row = 'abc123'
would be true on all rows that are not the specific value 'abc123'.
Table
id name
--- ------
1 chinu
2 sanjib
3 chinmay
My MYSQL Query
SELECT * FROM users WHERE MATCH (name) AGAINST ('chi' IN BOOLEAN MODE)
In above query i am getting 0 record.
My output will be coming
1 chinu
3 chinmay
How to get my actual record using MATCH...AGAINST query?
EDIT - If i am searching chinu instead of chi i am getting 1 record.
You need to add an asterisk to the 'chi' to indicate that the query should match against all that contain the string and not just the string itself. Just using the string 'chi' will only match exactly 'chi' for example.
change your query to read
SELECT * FROM users WHERE MATCH (name) AGAINST ('chi*' IN BOOLEAN MODE)
and you should get the results you expect.
I think you forgot the + sign:
SELECT * FROM users WHERE MATCH (name) AGAINST ('+chi' IN BOOLEAN MODE)
Or if it is an exact phrase, use double quotes to surround the string:
SELECT * FROM users WHERE MATCH (name) AGAINST ('"chi"' IN BOOLEAN MODE)
I am the first to admit that this is not easy to find. MySQL full text search uses a system variable called ft_min_word_length. The default value is 4, as shown here.
Because you are searching for a 3-character word, it is not being indexed. Hence it is not found.
More information is available in the documentation on fine tuning the search. But the basic idea is that you need to change the value of the parameter and rebuild the index.
For your particular query, though, you just need to include wildcards, as explained in other answers.
I have a simple task where I need to search a record starting with string characters and a single digit after them. What I'm trying is this
SELECT trecord FROM `tbl` WHERE (trecord LIKE 'ALA[d]%')
And
SELECT trecord FROM `tbl` WHERE (trecord LIKE 'ALA[0-9]%')
But both of the queries always return a null record
trecord
-------
null
Where as if I execute the following query
SELECT trecord FROM `tbl` WHERE (trecord LIKE 'ALA%')
it returns
trecord
-------
ALA0000
ALA0001
ALA0002
It means that I have records that starts with ALA and a digit after it,
EDIT
I'm doing it using PHP MySQL and innodb engine to be specific.
I think you can use REGEXP instead of LIKE
SELECT trecord FROM `tbl` WHERE (trecord REGEXP '^ALA[0-9]')
In my case (Oracle), it's WHERE REGEXP_LIKE(column, 'regex.*'). See here:
SQL Function
Description
REGEXP_LIKE
This function searches a character column for a pattern. Use this
function in the WHERE clause of a query to return rows matching the
regular expression you specify.
...
REGEXP_REPLACE
This function searches for a pattern in a character column and
replaces each occurrence of that pattern with the pattern you specify.
...
REGEXP_INSTR
This function searches a string for a given occurrence of a regular
expression pattern. You specify which occurrence you want to find and
the start position to search from. This function returns an integer
indicating the position in the string where the match is found.
...
REGEXP_SUBSTR
This function returns the actual substring matching the regular
expression pattern you specify.
(Of course, REGEXP_LIKE only matches queries containing the search string, so if you want a complete match, you'll have to use '^$' for a beginning (^) and end ($) match, e.g.: '^regex.*$'.)
I have the following MySQL query:
SELECT title, description
FROM some_table
WHERE MATCH (title,description) AGAINST ('+denver (REGEXP "[[:<:]]colorado[s]*[[:>:]]")' IN BOOLEAN MODE);
the "regexp" here looks for a "complete word" colorado (with or without the ending "s").
I want to actually select only those rows that have ("denver") AND ("colorado" or "colorados"). But I cannot put a "+" for the REGEXP. I tried but got 0 results, although there are rows in the table that match the requirement.
Any ideas on how I can get the "+" to work within against using a REGEXP?
I am constructing this from within a PHP script where "denver" and "colorado" are values of variables I use to construct the select statement.
My PHP/MySQL script would look somewhat like this:
SELECT title, description
FROM some_table
WHERE MATCH (title,description) AGAINST ('+$var1 (REGEXP "[[:<:]]$var2[s]*[[:>:]]")' IN BOOLEAN MODE);
I don't think it's possible to combine regular expressions and MATCH ... IN BOOLEAN MODE. You need to use the syntax for writing boolean expressions.
Boolean Full-Text Searches
Try something like this:
SELECT title, description
FROM some_table
WHERE MATCH (title,description)
AGAINST ('+denver +(colorado colorados)' IN BOOLEAN MODE);