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 !
Related
I have inherrited a DB that I've been tasked to mine for Data.
There are 2 tables that are loosely associated - atm and dslams.
The atm table contains "remotename", "rst", and "CardNumber" fields that relate to the dslams "hostname" field.
The atm table contains the port information for the dslam cards and the dslams table contains the information about the dslam card itself.
I've been tasked with printing out all the locations (dslams.name) that have a certain type of card (dslams.model="6256") and a count of all the ports on that card that have a certain level of service (atm.speed LIKE "RI_%%09" OR atm.speed LIKE "RI%%1%").
I've crafted the following statement which almost works...
SELECT distinct(dslams.name) AS Remote, Count(atm.speed) AS Customers, dslams.model
FROM dslams
LEFT JOIN atm
ON (dslams.hostname = CONCAT(atm.remotename,'-',atm.rst,'-S',atm.CardNumber)) AND (atm.speed LIKE "RI_%_%09" OR atm.speed LIKE "RI_%_%1_%")
GROUP BY dslams.name
HAVING dslams.model="6256"
ORDER BY dslams.name;
This prints out exactly what I need for all but 1 of the locations.
ie.
MariaDB [dsl]> SELECT distinct(dslams.name) AS Remote, Count(atm.speed) AS Customers, dslams.model
-> FROM dslams
-> LEFT JOIN atm
-> ON (dslams.hostname = CONCAT(atm.remotename,'-',atm.rst,'-S',atm.CardNumber)) AND (atm.speed LIKE "RI_%_%09" OR atm.speed LIKE "RI_%_%1_%")
-> GROUP BY dslams.name
-> HAVING dslams.model="6256"
-> ORDER BY dslams.name;
+---------+-----------+-------+
| Remote | Customers | model |
+---------+-----------+-------+
| ANTH-C2 | 1 | 6256 |
| BETY-C2 | 1 | 6256 |
| BHOT-C2 | 6 | 6256 |
| BNSH-C2 | 1 | 6256 |
| BUG2-C2 | 1 | 6256 |
| CCRK-C2 | 0 | 6256 |
...
| STLN-C2 | 1 | 6256 |
| SUMR-C2 | 2 | 6256 |
...
| WGRV-C2 | 0 | 6256 |
+---------+-----------+-------+
63 rows in set (0.34 sec)
For some reason there's one location that's not getting counted - STWL-C2.
MariaDB [dsl]> SELECT distinct(name), model FROM dslams WHERE model="6256" order by name;
+---------+-------+
| name | model |
+---------+-------+
| ANTH-C2 | 6256 |
| BETY-C2 | 6256 |
| BHOT-C2 | 6256 |
| BNSH-C2 | 6256 |
| BUG2-C2 | 6256 |
| CCRK-C2 | 6256 |
...
| STWL-C2 | 6256 |
...
| WGRV-C2 | 6256 |
+---------+-------+
64 rows in set (0.00 sec)
There's no difference in the tables between the STWL-C2 location and the other locations so it should print out with a count of 0.
Can anyone help me figure out why that 1 location is being missed?
Any help or direction would be appreciated as I am a rookie SQL programmer trying to understand this as best I can.
Best Regards,
Joe
Don't use HAVING dslams.model = '6256', put that in the WHERE clause. When you use HAVING, it filters after grouping. When you group by name, the result can contain the model from any row in the group, and it won't necessarily choose model = '6256'.
SELECT dslams.name AS Remote, Count(atm.speed) AS Customers, dslams.model
FROM dslams
LEFT JOIN atm
ON (dslams.hostname = CONCAT(atm.remotename,'-',atm.rst,'-S',atm.CardNumber)) AND (atm.speed LIKE "RI_%_%09" OR atm.speed LIKE "RI_%_%1_%")
WHERE dslams.model = '6256'
GROUP BY dslams.name
ORDER BY dslams.name;
Ok, I'd like to start off by apologizing (profusely), since this seems to be a common question. Most of the examples seem to be somewhat similar, as well, but - for the life of me, I cannot wrap my brain around how to apply the myriad of quality responses to my specific table. And, I'm sure it's probably just the easiest thing in the world, what with all the very thorough responses/examples/links to resources with explanations/etc.
So, I suppose I'll just get right to it. The basics:
We host off-site copies of our clients' backups.
We need to know how much space they're using.
We are not at all consistent in Naming Convention, folder vs. disk per client, etc.
We need to automate a 'report', monthly, with data as follows:
-[C.Srv 01]---Size(GB)--Free(%)
Client 01 [Total] [AVG]
Server 01 109.43 25
Server 02 415.19 25
WHERE C.Srv = [Specified Cloud Server]
Clients Get a Total Size(GB) and an Average Free(%)
My MySQL table is this:
# Name DataType Length/Set Unsigned Allow NULL ZeroFill Default
1. ID INT 11 AUTO_INCREMENT
2. Client TEXT
3. Server TEXT
4. C.Srv TEXT
5. Size DECIMAL 10,2
6. Free DECIMAL 10,4
So, for Example, let's say I have this...
___ ________ ________ _________ _________ _______
ID | CLIENT | SERVER | C.SRV | SIZE | FREE
---|--------|--------|---------|---------|-------
1 | a | adc | cs_01 | 109.43 | 0.2504
2 | a | asql | cs_01 | 415.19 | 0.2504
3 | b | bdc | cs_01 | 583.91 | 0.1930
4 | b | bdev | cs_01 | 316.52 | 0.1930
5 | b | bsql | cs_01 | 1259.56 | 0.1930
6 | c | cdc | cs_01 | 355.30 | 0.7631
7 | d | ddc | cs_01 | 398.21 | 0.5808
Is it possible to get something pretty, in HTML (preferably), that has the basic structure of this...
_______ __________ ________
CS_01 | Size(GB) | Free(%)
-------|----------|--------
-a | 524.62 | 25.04%
-------|----------|--------
adc | 109.43 | 25.04%
asql | 415.19 | 25.04%
-b | 2178.88 | 19.30%
-------|----------|--------
bdc | 583.91 | 19.30%
bdev | 316.52 | 19.30%
bsql | 1259.56 | 19.30%
+c | 355.30 | 76.31%
-------|----------|--------
+d | 398.21 | 58.08%
_______|__________|________
Or, am I just S.O.L.? Format, I can mess with in CSS, or whatever (I hope), just so long as it's in that basic structure. (I don't know if it matters, but the final goal will be to collapse at the Client Level; in case that somehow factors into the approach/data-gathering.)
I have a lot of spreadsheets that pull transactional information from our ERP software into Excel using the Microsoft Query that we then perform other calculations on automatically. Recently we upgraded our ERP system, but management made the decision to leave the transactional history in the old databases to have a clean one going forward in the new system. I still need to have some "rolling 12 months" graphs, but if I use only the old database, I'm missing new data and if I use only the new, I'm missing the last 11 months data.
Is there a way that I can write a query in Excel to pull data from the old database PartTran table and merge it with the new database PartTran table without user intervention each time? For instance, I don't want my users (if possible) to have to have two queries that they copy and paste into one Excel table. The schema of the tables (at least the columns I need) are identically named and defined.
If you want to take a bit of a fun, hacky Excel approach, you could do the "copy-paste" bit FOR your users behind the scenes. Given two similar tables OLD and NEW with structures
+-----+------+-------+------------+
| id | foo | bar | date |
+-----+------+-------+------------+
| 95 | blah | $25 | 2015-06-01 |
| 96 | bork | $12 | 2015-07-01 |
| 97 | bump | $200 | 2015-08-01 |
| 98 | fizz | | 2015-09-01 |
| 99 | buzz | $50 | 2015-10-01 |
| 100 | char | ($1) | 2015-11-01 |
| 101 | mope | | 2015-12-01 |
+-----+------+-------+------------+
and
+----+-----+-------+------------+------+---------+
| id | foo | bar | date | fizz | buzz |
+----+-----+-------+------------+------+---------+
| 1 | cat | ($10) | 2016-01-01 | 285B | 1110111 |
| 2 | dog | $25 | 2016-02-01 | 27F5 | 1110100 |
| 3 | ant | $100 | 2016-03-01 | 1F91 | 1001111 |
+----+-----+-------+------------+------+---------+
... you can union together the data for these two datasets with some prudent excel wizardry as below:
Your UNION table ( named using alt+j+t+a ) should have the following items:
New natural ID
DataSet pointer ( name of old or new table )
Derived ID from original dataset
Columns of data you want from Old & New DataSets
example:
+---------+------------+------------+----+------+-----+------------+------+------+
| UnionId | SourceName | SourceRank | id | foo | bar | date | fizz | buzz |
+---------+------------+------------+----+------+-----+------------+------+------+
| 1 | OLD | | | | | | | |
| 2 | NEW | | | | | | | |
+---------+------------+------------+----+------+-----+------------+------+------+
You will then make judicious use of Indirect() and VlookUp() to derive the lookup id and column targets. Sample code below
SourceRank - helper column
=COUNTIFS([SourceName],[#SourceName],[UnionId],"<="&[#UnionId])
id - the id from the original DataSet
=SMALL(INDIRECT([#SourceName]&"[id]"),[#SourceRank])
Everything else is just VlookUp madness!! Although I've taken the liberty of copying the sample code below for reference
foo =VLOOKUP([#id],INDIRECT([#SourceName]),MATCH(UNION[[#Headers],[foo]],INDIRECT([#SourceName]&"[#Headers]"),0),0)
bar =VLOOKUP([#id],INDIRECT([#SourceName]),MATCH(UNION[[#Headers],[bar]],INDIRECT([#SourceName]&"[#Headers]"),0),0)
date =VLOOKUP([#id],INDIRECT([#SourceName]),MATCH(UNION[[#Headers],[date]],INDIRECT([#SourceName]&"[#Headers]"),0),0)
fizz =VLOOKUP([#id],INDIRECT([#SourceName]),MATCH(UNION[[#Headers],[fizz]],INDIRECT([#SourceName]&"[#Headers]"),0),0)
buzz =VLOOKUP([#id],INDIRECT([#SourceName]),MATCH(UNION[[#Headers],[fizz]],INDIRECT([#SourceName]&"[#Headers]"),0),0)
Output
You'll likely want to make prudent use of If() and/or IfError() to help your users ignore the new column references to the old table and those rows that do not yet have data. Without that, however, you'll end up with something like the below.
This is both ready to accept & read new inputs to both OLD and NEW DataSets and is sortable to get rid of those pesky placeholder rows...
Hope this helps! Happy coding!
I have table named questions like follows
+----+---------------------------------------------------------+----------+
| id | title | category |
+----+---------------------------------------------------------+----------+
| 89 | Tinker or work with your hands? | 2 |
| 54 | Sketch, draw, paint? | 3 |
| 53 | Express yourself clearly? | 4 |
| 77 | Keep accurate records? | 6 |
| 32 | Efficient? | 6 |
| 52 | Make original crafts, dinners, school or work projects? | 3 |
| 70 | Be elected to office or make your opinions heard? | 5 |
| 78 | Take photographs? | 3 |
| 84 | Start your own political campaign? | 5 |
| 9 | Free spirit or a rebel? | 3 |
| 38 | Lead a group? | 5 |
| 71 | Work in groups? | 4 |
| 2 | Helpful? | 4 |
| 4 | Mechanical? | 6 |
| 14 | Responsible? | 6 |
| 66 | Pitch a tent, an idea? | 1 |
| 62 | Write useful business letters? | 5 |
| 28 | Creative? | 3 |
| 68 | Perform experiments? | 2 |
| 10 | Like to figure things out? | 2 |
+----+---------------------------------------------------------+----------+
I have a sql query to get one random record from each category.Can any one convert the mysql query to rails activerecord query(with out using Question.find_by_sql).This mysql query is working absolutely fine but I need only active record query because of my dependency in further steps.
Here is mysql query
SELECT t.id, title as question, category
FROM
(
SELECT
(
SELECT id
FROM questions
WHERE category = t.category
ORDER BY RAND()
LIMIT 1
) id
FROM questions t
GROUP BY category
) q JOIN questions t
ON q.id = t.id
Thank You for your consideration!
When things get crazy one have to reach out for Arel:
It is intended to be a framework framework; that is, you can build
your own ORM with it, focusing on innovative object and collection
modeling as opposed to database compatibility and query generation.
So what we want to do is to let Arel create the query for us. Moreover the approach here is gonna be used: the questions table is left joined with randomized version of itself:
q_normal = Arel::Table.new("questions")
q_random = Arel::Table.new("questions").project(Arel.sql("*")).order("RAND()").as("q2")
Time to left join
query = q_normal.join(q_random, Arel::Nodes::OuterJoin).on(q_normal[:category].eq(q_random[:category])).group(q_normal[:category]).order(q_random[:category])
Now you can use which columns you want using project, e.g.:
query.project(q_normal[:id])
The only way I can think of to do this requires a good bit of application code. I don't think there's a way of accessing the RAND() functionality in MySQL (or equivalent in other DB technologies) using ActiveRecord. Here's what I came up with:
counts = Question.group(:category_id).count(:id)
offsets = {}
counts.each do |cat_id, count|
offsets[cat_id] = rand(count)
end
random_questions = []
offsets.each do |cat_id, offset|
random_questions.push(Question.where(:category_id => cat_id).offset(offset).first)
end
It might sound silly but Im just curious.
I have a table named posts:
+----------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| title | varchar(50) | YES | | NULL | |
| body | text | YES | | NULL | |
| created | datetime | YES | | NULL | |
| modified | datetime | YES | | NULL | |
+----------+------------------+------+-----+---------+----------------+
The values:
+----+-----------------------+----------------------------------------+---------------------+---------------------+
| id | title | body | created | modified |
+----+-----------------------+----------------------------------------+---------------------+---------------------+
| 2 | A title once again!!! | And the post body follows. Tralalalala | 2013-06-03 13:13:44 | 2013-06-05 09:36:51 |
| 3 | Title strikes back | This is really exciting! Not. | 2013-06-03 13:13:46 | NULL |
| 11 | Tomcat | Tommy boy!!! FFF | 2013-06-04 16:33:22 | 2013-06-04 16:48:40 |
| 12 | FFD | dsfdsf | 2013-06-04 16:48:56 | 2013-06-04 16:55:50 |
| 13 | fdf | dfdsf | 2013-06-04 16:57:47 | 2013-06-05 09:36:54 |
| 14 | GGD | dsfdsf | 2013-06-04 17:02:33 | 2013-06-04 17:02:33 |
| 15 | GG# | dsfdsfff322 | 2013-06-05 09:36:20 | 2013-06-05 09:36:28 |
+----+-----------------------+----------------------------------------+---------------------+---------------------+
Let's say I want to search for row that has the value Th (not case sensitive) regardless of the FIELD. This is like making a quick search function.
Normally I would do something like : SELECT * FROM posts WHERE title LIKE '%Th%' OR body LIKE '%Th%'
I did not include the other fields because obviously they are not gonna accept those values.
I wanna know if there's a shortcut to this? Like SELECT * FROM posts LIKE '%Th%'.
Please advise. Thanks.
Using plain old SQL you need to specify all the column names you wish to include.
If you want more search-box-like behavior, I'd suggest looking at MySQL's fulltext functions; see:
http://dev.mysql.com/doc/refman/5.0/en/fulltext-search.html
The SQL language is based on the presumption of the schema being known. Thus, there is no "search any column" type of functionality. How would it work against non-text columns? What about columns of different collations? Aside from the language not having a feature, specifying the columns expresses your intent to the next developer and that as much as anything should be an overriding consideration.
Other answers have covered that you need to specify all the columns. Here is an alternative formulation that is a bit shorter:
SELECT *
FROM posts
WHERE concat(title, ' ', body) LIKE '%Th%'
If you are looking for an exact match, then you can do:
select *
from posts
where 'Th' in (title, body)
No there is no shortcut for using a where clause. and specifying the columns. Otherwise the query engine can never know what to filter and what column to filter unless you specify them in the where clause.
If you want a custom shortcut - you can write a function which takes a single parameter (the search string) and returns the required fields.
I'm afraid there isn't.
Not sure what your use case is... does this alternative approach work for your use case?
mysql -u{user} -p{password} -h{hostname} {database_name} -B -e "{query}" | grep "{search_string}"
It connects to the database and runs the specified query, returns query results in new lines, fields separated by tab stop. Then use Unix utility grep to filter returned rows.