From my names table containing values id, firstName, lastName I want to take out all rows, but from the firstName I just want the first letter.
I know I can make custom mySql query with doctrine but was wondering is there a more....well docrtine way to do such things (and other value select operations).
What could be the way to do it with solely doctrine?
An option to get the full string and then cut it in php is out of the question.
I think you're looking for DQL Function substring(). If you're using query builder, You can do $qb->expr()->substring(string, start,end). If I remember correctly, first character's position is 1 not 0.
Refer: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/dql-doctrine-query-language.html
Related
Am using a SQL command in PHP to count the no of values inserted in a column named attack_type. I want to count the occurrence of individual values like website defacement in the whole column of the table. But here the column attack_type contain different values, separated by a comma and the count is treating whole column data as a string. Below is my current SQL statement with its output
I tried explode print_r in PHP
SELECT attack_type,
count(*) as number
FROM data_input_test
GROUP BY attack_type
Here is the output of the above statement
generated:
https://drive.google.com/open?id=1TyRL_Mh0OOJWaCpFczxmBr34No9LUpzH
But what I want is :
https://drive.google.com/open?id=1eeA_1TCER0WMpZwSkBDMzRtRa8xihbZd
and so on. The above desired output is edited to show what I exactly want.
Other answer on stackoverflow and on other forums are either irrelevant or are using regrex or a new table creation in one or the other way. That I don't want as my hosting has some limitations. My hosting doesnt provide creation of triggers, regrex or creation of temp tables
I may have a solution for this but don't know how to apply here. Possible here: https://www.periscopedata.com/blog/splitting-comma-separated-values-in-mysql
Please someone explain me how to apply the same here.
So I finally worked around to get my work done using the select only. This only works if you have a finite set of data or specifically less than 64 values.
Change your column datatype to 'set' type. And enter your set values.
Now use select, count, find_in_set and union functions of sql.
Example:
union select 'Un-patched Vulnerable Software Exploitaion'as type, count(*) as number from data_input_test where find_in_set('Un-patched Vulnerable Software Exploitaion',attack_type)```
and so on for all your values
I know this is not how you should do but as the legends say this works 😎😎
If you just want to count comma-separated values in rows, you can use:
SELECT SUM(LENGTH(attack_type) - LENGTH(replace(attack_type, ',', '')) +1) AS TotalCount
FROM table_name;
I have a table methodology in mysql where a column contain values like 1,2,3,4,5,6 or 3,4,6 or 25,4,7,8 in multiple row.
Now in my scenario i have a company which contain id 6 and i want to Match this value with methodology table value. But i don't have any idea how i can do it.
I am trying that first it get all values from methodology table one by one and after that match value of company.
can anyone please help me??
You can use FIND_IN_SET(your_id, columnname) function.
Query will be like
SELECT * FROM
methodology
where FIND_IN_SET(your_id, columnname)
For more details about function please refer : http://www.w3resource.com/mysql/string-functions/mysql-find_in_set-function.php
Use LIKE from mysql queries.
An example :
SELECT row FROM my_table WHERE my_column LIKE %6%
You need to use find_in_set function
http://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_find-in-set
To elaborate on #matthiasbe's incomplete answer, if you want to use LIKE, you should do as follows :
SELECT * FROM methodology WHERE companies LIKE '%,6,%' OR companies LIKE '6,%' OR companies LIKE '%,6'
This will match all rows where companies either has ,6, in its value or begins with 6, or ends with ,6.
This is far from being a perfect solution (both in clarity of the code and execution time), I'm just listing the options, hope it helps.
I have a PHP interface with a keyword search, working off a DB(MySQL) which has a Keywords field.
The way in which the keywords field is set up is as follows, it is a varchar with all the words formatted as shown below...
the, there, theyre, their, thermal etc...
if i want to just return the exact word 'the' from the search how would this be achieved?
I have tried using 'the%' and '%the' in the PHP and it fails to work by not returning all of the rows where the keyword appears in.
is there a better (more accurate) way to go about this?
Thanks
If you want to select the rows that have exactly the keyword the:
SELECT * FROM table WHERE keyword='the'
If you want to select the rows that have the keyword the anywhere in them:
SELECT * FROM table WHERE keyword LIKE '%the%'
If you want to select the rows that start with the keyword the:
SELECT * FROM table WHERE keyword LIKE 'the%'
If you want to select the rows that end with the keyword the:
SELECT * FROM table WHERE keyword LIKE '%the'
Try this
SELECT * FROM tablename
WHERE fieldname REGEXP '[[:<:]]test[[:>:]]'
[[:<:]] and [[:>:]] are markers for word boundaries.
MySQL Regular Expressions
if you also search for the commas, you can be sure you are getting the whole word.
where keywordField like '%, the, %'
or keywordField like '%, the'
or keywordField like 'the, %'
maybe I didn't understand the question properly... but If you want all the words where 'the' appears, a LIKE '%word%' should work.
If the DB of words is HUGE MySQL may fail to retrieve some of the words, that can be solved in 2 ways...
1- get a DB that support bigger sizes (not many ppl would chose this one tho). For example SQL Server has a 'CONTAINS' function that works better than LIKE '%word%'.
2- use a external search tool that uses inverted index search. I used Sphinx for a project and it works quite good. This is better if you rarely UPDATE the rows of the data you want to search from, which should be the case.
Sphinx for example would generate a file from your MySQL table and use this file to solve the search (it's very fast), this file should be re-indexed everytime you do a insert or update on the table, making it a much better solution if you rarely update or insert new rows.
It looks like you have a one to many relationship going on within a column. It might be better to create a separate table for keywords with a row for each keyword and a foreign key to whatever it is you're searching on.
Doing like '%???%' is generally a bad idea because the DB can't make use of an index so it will scan the whole table. Whether this matters will depend on the size of data you're working with but its worth considering up front. The single best way to help DB performance is in the initial table design. This can be tricky to change later.
I'm looking for a way to compare database values against a given query using MySql
(in oppose of searching the query in the db)
I will elaborate:
I have a table that holds comma separated keywords and a result for each block of keywords
for example :
col 1 col 2
Mercedes,BMW,Subaru car
Marlboro,Winston cigarette
today im taking the user query (for example - Marlboroligt)
as you can see if i will search for the value 'Marlboroligt' in the db i will get no results.
for that matter i want to search 'Marlboro' from the db inside the query and return 'cigarette'
Hope my explanation is sufficient and that this is actually possible :-).
Normalization will help you the most. Otherwise, search in comma delimited fields is discussed here:
Select all where field contains string separated by comma
...and to search 'Marlboroligt' instead of 'Marlboro Light', you can try looking into the LEVENSHTEIN function, or maybe the Soundex encoding (which looks like too little bang for too large a buck, but then again, maybe...).
I see the following possible solutions:
setup a keyword-search engine like Sphinx and use it to search keywords in your db
normalize your db - col1 must contain the only keyword
use like patterns
select col2 from mytable where col1 like "%Marlboro%"
like slows down your application and can have substring-related issues.
I want to filter result of my SQL query. I want to select everything that has some specific text in some column.
Example:
SELECT * FROM categories WHERE (name
has 'abc' values in it's value ex.
MyabcCategory)
Also maybe it is not very good idea to do that in query, maybe it is better to get all and then filter array instead? But I don't know how to do that aether.
Use LIKE with % wildcard:
SELECT * FROM categories WHERE name LIKE '%abc%'
This will give you all the records that have abc somewhere in them.
You can learn more about it here :)
You want to use the LIKE operator, with % to match any character before and after your specific word :
select *
from categories
where name like '%abc%';
But note that doing so, MySQL will scan each line of the table, every time the query is executed... which might not be great if you have a lot of data.
If you're searching for some kind of text, you might either want to :
Use a FULLTEXT index, if you're working with MyISAM tables.
Or, use a solution that's separated from MySQL, with a specific indexing/search engine, such as Solr.
SELECT * FROM categories WHERE name LIKE '%abc%'