I'm having a query problem. I use MySQL as DB. I want to use a REGEX to match the result I expected and the Table is:
table A
-----------------------------------------------
| ID | Description |
-----------------------------------------------
| 1 | 29th Marine Regiment/1st Bn (1/29) |
| 2 | new 21 new 2 new |
| 3 | new 2th 2 (2/2) |
| 4 | 2new 2new (2/2) |
| 5 | new2 new 2new |
The result I need to get :
-----------------------------------------------
| ID | Description |
-----------------------------------------------
| 1 | 29th Marine Regiment/1st Bn (1/29) |
I have the correct result for regex
^(29[^0-9]+)[^0-9]+1[^0-9]+\([a-zA-Z0-9/-]*\)\s*$
in http://www.regexr.com/ but I don't get the result in MySQL.
http://sqlfiddle.com/#!2/7bd4b/2
Does anyone know how this happen?
(Turning my comment into an answer.)
You need to escape backslashes! E.g. \( → \\(.
And there are some other issues:
The group in the beginning is not used anywhere, so it can be removed.
[^0-9]+[^0-9]+ (once the group has been removed) is rather redundant. It can be shortened to [^0-9]{2,}, but in this case it looks like [^0-9]+ will suffice.
The fiddle version had some strange {}s that had to be removed.
The result is thus:
'^29[^0-9]+1[^0-9]+\\([a-zA-Z0-9/-]*\\)\\s*$'
Related
I've recently tried to create an executable with python 2.7 which can read a MySQL database.
The database (named 'montre') regroups two tables : patient and proto_1
Here is the content of those tables :
mysql> select * from proto_1;
+----+------------+---------------------+-------------+-------------------+-----
----------+----------+
| id | Nom_Montre | Date_Heure | Temperature | Pulsion_cardiaque | Taux
_oxy_sang | Humidite |
+----+------------+---------------------+-------------+-------------------+-----
----------+----------+
| 1 | montre_1 | 2017-11-27 19:33:25 | 22.30 | NULL |
NULL | NULL |
| 2 | montre_1 | 2017-11-27 19:45:12 | 22.52 | NULL |
NULL | NULL |
+----+------------+---------------------+-------------+-------------------+-----
----------+----------+
mysql> select * from patient;
+----+-----------+--------+------+------+---------------------+------------+----
----------+
| id | nom | prenom | sexe | age | date_naissance | Nom_Montre | com
mentaires |
+----+-----------+--------+------+------+---------------------+------------+----
----------+
| 2 | RICHEMONT | Robert | M | 37 | 1980-04-05 23:43:00 | montre_3 | ess
aye2 |
| 3 | PIERRET | Mandy | F | 22 | 1995-04-05 10:43:00 | montre_4 | ess
aye3 |
| 14 | PIEKARZ | Allan | M | 22 | 1995-06-01 10:32:56 | montre_1 | Hea
lthy man |
+----+-----------+--------+------+------+---------------------+------------+----
----------+
As I'm just used to code in C (no OOP), I didn't create class in the python project (shame on me...). But I managed, in two files, to create something (with mysql.connector) which can print (on the cmd) my database and excecute sub like looking-for() etc.
Now, I want to create a GUI for users with pyqt. Unfortunately, I saw that the structure is totally different, with class etc. But okay, I tried to go throught this and I've created a GUI which allows to display the table "patient". But I didn't manage (in the datasheet of QT) to find how I can use the programs I've already created to display. Neither how to display in a tableWidget only several rows of my table patient for exemple (Using QSQL).
For example, if I want to display all the table patient, I use this line (pyQt):
self.model.setTable("patient")
For this one, I got it, but that disturb me because there is no MySQL coding requisites to display my table and so I don't know how to sort only the rows we want to see and display them. If we only want to see, for example, the ID n°2, how to display in the table:widget only Robert ?
To recap, I want to know :
If I can take the coding I've created and combine it with pyQT
How to display (tableWidget) only rows which are selected by MySQL. Is that possible ?
Please find in the URL my code for a better understanding of my problem :
https://drive.google.com/file/d/1nxufjJfF17P5hN__CBEcvrbuHF-23aHN/view?usp=sharing
I hope I was clear, thank you all for your help !
I have a database like below
+------------+---------------------------------------+--------+
| sender | subject | day |
+------------+---------------------------------------+--------+
| Darshana | Re: [Dev] [Platform] Build error | Monday |
| Dushan A | (MOLDOVADEVDEV-49) GREG Startup Error | Monday |
+------------+---------------------------------------+--------+
I want to get the result using the above table. It should check if the subject contains the given word then add one to the that word column for a given day.
|Day | "Dev" | "startup"|
+---------+------------+----------+
| Monday | 1 | 2 |
| Friday | 0 | 3 |
I was thought of using DECODE function but I couldn't get the expected result.
You can do this with conditional aggregation:
select day, sum(subject like '%Dev%') as Dev,
sum(subject like '%startup%') as startup
from table t
group by day;
I have the following situation:
Table Words:
| ID | WORD |
|----|--------|
| 1 | us |
| 2 | to |
| 3 | belong |
| 4 | are |
| 5 | base |
| 6 | your |
| 7 | all |
| 8 | is |
| 9 | yours |
Table Sentence:
| ID | SENTENCE |
|----|-------------------------------------------|
| 1 | <<7>> <<6>> <<5>> <<4>> <<3>> <<2>> <<1>> |
| 2 | <<7>> <<8>> <<9>> |
And i want to replace the <<(\d)>> with the equivalent word from the Word-Table.
So the result should be
| ID | SENTENCE |
|----|--------------------------------|
| 1 | all your base are belong to us |
| 2 | all is yours |
What i came up with is the following SQL-Code:
SELECT id, GROUP_CONCAT(word ORDER BY pos SEPARATOR ' ') AS sentence FROM (
SELECT sentence.id, words.word, LOCATE(words.id, sentence.sentence) AS pos
FROM sentence
LEFT JOIN words
ON (sentence.sentence REGEXP CONCAT('<<',words.id,'>>'))
) AS TEMP
GROUP BY id
I made a sqlfiddle for this:
http://sqlfiddle.com/#!2/634b8/4
The code basically is working, but i'd like to ask you pros if there is a way without a derived table or without filesort in the execution plan.
You should make a table with one entry per word, so your sentense (sic) can be made by joining on that table. It would look something like this
SentenceId, wordId, location
2, 7, 1
2, 8, 2
2, 9, 3
They way you have it set up, you are not taking advantage of your database, basically putting several points of data in 1 table-field.
The location field (it is tempting to call it "order", but as this is an SQL keyword, don't do it, you'll hate yourself) can be used to 'sort' the sentence.
(and you might want to rename sentense to sentence?)
I am new to databases. In mysql database I have one table course. My question is: how to search all related words in both columns course_name and course_description and i need to get all the matched words in both columns? Can any one tell me the sql query for it? I have tried to write a query, but I am getting some syntax errors.
+----------+-----------+-----------------+------------+------------+
| courseId | cname | cdesc | sdate | edate |
+----------+-----------+-----------------+------------+------------+
| 301 | physics | science | 2013-01-03 | 2013-01-06 |
| 303 | chemistry | science | 2013-01-09 | 2013-01-09 |
| 402 | afm | finanace | 2013-01-18 | 2013-01-25 |
| 403 | English | language | 2013-01-17 | 2013-01-24 |
| 404 | Telugu | spoken language | 2013-01-10 | 2013-01-22 |
+----------+-----------+-----------------+------------+------------+
SELECT * from course WHERE cname='%searchtermhere%' AND cdesc='%searchtermhere%'
Adding the percent % makes the search within each value and not just beginning with.
If you want to search exact word
SELECT * FROM course WHERE cname ='word' AND cdesc = 'word'
OR you can also find each value and not just start from begining.
SELECT * FROM course WHERE cname = '".%searchtermhere%."' AND cdesc = '".%searchtermhere%."'
Since you say single parameter i guess. You will get either 'science' as input or 'physics' as input. Then you could simply use 'OR'.
select * from course where cname = (Input) or cdesc = (Input)
I have a table organized in the following way:
id | userid | action | notes | created_at
-----------------------------------------
1 | 1 | foo | bar | datetime
2 | 33 | foo | bax | datetime
3 | 1 | foo | okay | datetime
4 | 3 | bam | bad | datetime
5 | 33 | foo | bom | datetime
What I would like to be able to do is, in Ruby on Rails, group the rows by userid but grab only the most recent entry for each group.
As it stands, I've gotten this far:
Thing.select("userid, notes").where(:action => "foo").order('`when` DESC')
Which will usually return something like:
userid | notes
--------------
1 | bar
33 | bax
When what I'm looking for is this:
userid | notes
--------------
1 | okay
33 | bom
I think I copy/pasted that all right...heh. Is there a way to achieve what I'm trying to do? Without resorting to searching inside my app itself? Thanks.
Update Attempted the first suggestion, no dice.
Just add .order("id desc") to the end of your line