Is it possible to customize the order_by query in MySQL or in CI ? Such as I want my column to be ordered by ('1', '11', '4', '2', '21', '3', '5', '7') So if I query it as ASC the result will show in the order of my customized order.
If it is not possible, what is the best workaround to get these order ? Hoping for a simple solution just using the MySQL query.
All answers and suggestions are greatly welcomed. Thanks.
Try this one.
$this -> db -> order_by('FIELD ( table.id, 1, 11, 4,2,21,3,5,7 )');
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Pure Mysql answer is yes you can order a field by a set list with the MYSQL FIELD() function
SELECT *
FROM mytable
WHERE id IN ('1', '11', '4', '2', '21', '3', '5', '7')
ORDER BY FIELD(id, '1', '11', '4', '2', '21', '3', '5', '7')
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I have to make a webpage using PHP and MySQL workbench to collect form data and I keep getting this error:
INSERT INTO tools ( id, tool1, tool2, tool3, tool4, tool5, tool6, tool7, tool8, tool9, tool10) VALUES ( '0','1', '2', '3', '4,' '5', '6', '7', '8', '9', '10')
INSERT failed: INSERT INTO tools ( id, tool1, tool2, tool3, tool4, tool5, tool6, tool7, tool8, tool9, tool10) VALUES ( '0','1', '2', '3', '4,' '5', '6', '7', '8', '9', '10')
Column count doesn't match value count at row 1
This is what my code looks like:
$query = "INSERT INTO tools ( id, tool1, tool2, tool3, tool4, tool5, tool6, tool7, tool8, tool9, tool10) VALUES ( '0','1', '2', '3', '4,' '5', '6', '7', '8', '9', '10')";
and this is what it looks like in workbench:
INSERT INTO tools (id, tool1, tool2, tool3, tool4, tool5, tool6, tool7, tool8, tool9, tool10) VALUES ( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
I've tried it with an without the id and the 0 value, and neither work. Does anyone know how to fix this?
Your code
INSERT INTO tools ( id, tool1, tool2, tool3, tool4, tool5, tool6, tool7, tool8, tool9, tool10)
VALUES ( '0','1', '2', '3', '4,' '5', '6', '7', '8', '9', '10')
Has an error exactly between 4 and 5 the apostrophes are misspaced
It must look like this
INSERT INTO tools ( id, tool1, tool2, tool3, tool4, tool5, tool6, tool7, tool8, tool9, tool10)
VALUES ( '0','1', '2', '3', '4', '5', '6', '7', '8', '9', '10')
I want to get only the last reports, for all items but only the most recent report for each item_id.
Here is my current solution:
SELECT distinct * FROM t.reports ORDER BY created DESC LIMIT 100
My table consists of the following columns:
id | user | item_id | created
'2', '1', '2643', '2017-06-13 16:28:34'
'3', '1', '19333', '2017-06-13 19:26:56'
'4', '1', '19333', '2017-06-13 19:29:24'
'5', '1', '1319', '2017-06-13 19:29:56'
'6', '1', '1319', '2017-06-13 19:30:16'
'7', '1', '1319', '2017-06-13 19:30:17'
'8', '1', '1319', '2017-06-13 19:30:18'
'9', '1', '1319', '2017-06-13 19:30:25'
'10','1', '1319', '2017-06-13 19:31:51'
I want no duplicate item_ids AND only the most recent entry for that item.
BUT i also want ALL reports, but no duplicate item reports!
EXAMPLE:
i expect that when i execute my query, i only get row 2,4 and 10 returned.
Try this:
select a.id,a.user,a.item_id,a.created
from reports as a
where a.created=(select max(created)
from reports as b
where a.item_id=b.item_id)
Try This let me know if this works.
SELECT *
FROM t.reports
where item_id in (
select distinct item_id
from t.reports
)
ORDER BY updated DESC
LIMIT 100
Try with this I have tested it on my test database:
SELECT DISTINCT item_id, MAX(created), id, user
FROM `t.reports`
GROUP BY item_id
ORDER BY MAX(created) DESC
You can use group by :
SELECT * FROM t.reports WHERE created IN (SELECT max(created) FROM t.reports)
GROUP BY item_id
LIMIT 100
Error
INSERT INTO PENILAIAN (ID,KURSUSID,QUEST1,QUEST2,QUEST3,QUEST4,QUEST5,QUEST6,QUEST7,QUEST8,QUEST9,QUEST10)VALUES ('951019105851', ''13'', '1', '2', '3', '4', '4', '5', '4', '5', '4', '5')
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '13'', '1', '2', '3', '4', '4', '5', '4', '5', '4', '5')' at line 3
code
"INSERT INTO PENILAIAN (ID,KURSUSID,QUEST1,QUEST2,QUEST3,QUEST4,QUEST5,QUEST6,QUEST7,QUEST8,QUEST9,QUEST10)VALUES
('$login_sessionID',
'$kid','$QUEST1','$QUEST2','$QUEST3','$QUEST4','$QUEST5','$QUEST6','$QUEST7','$QUEST8','$QUEST9','$QUEST10')";
Error simply guides you
''13''
^ ^
there is additional single quote
keep only one ' pair for code
Use prepared statements
I think you have double quotes on ''13''.
olso i want to ask, does any of the values contain quotes? like this (I'am x)
if you use quotes you should use mysql_real_escape_string when you POST
I have a query that creates a rolling sum and subtracts that from a sum total. I have the query working in the SQL window, but I need some help changing it in to a view or table that I can call from a PHP so I can use the results in building a graph.
This query builds the basis for a burndown report used in project management so it is very handy.
When I try to create a view out it I get multiple errors with joins and variables not being allowed in a view. I am kind of a mysql newbie and I am beating my head on this one.
Here is the SQL query:
SELECT
taskid,
projectid,
esthours,
actualhours,
eview.SE As TotalHours,
(#EST:=#EST - esthours) as ESTI,
(eview.SE + #EST) as Estimated,
(#EST2:=#EST2 - actualhours) as AC,
(eview.SE + #EST2) as Actual
from
tbltasks,
eview
JOIN
(SELECT #EST:=0) EE
JOIN
(SELECT #EST2:=0) E2;
Here is a sample of the results.
taskid, projectid, esthours, actualhours, TotalHours, ESTI,Estimated, AC, Actual
'1021', '2', '4', '3', '20', '-4', '16', '-3', '17'
'1022', '2', '3', '3', '20', '-7', '13', '-6', '14'
'1023', '2', '2', '4', '20', '-9', '11', '-10', '10'
Throughout querying my database with the queries as the one below;
Model::with('first','second','third','fouth','fiveth')
->orderBy('title')
->remember(2,'domain.query')
->get()
The overall query gets cached etc, but why don't the relationships that I attach to the query. Would I have to do a join on the models etc to accomplish everything getting cached etc?
Queries made in Clockwork:
SELECT * FROM `first_table` WHERE `first_table`.`id` in ('2', '4', '3')
SELECT * FROM `second_table` WHERE `second_table`.`id` in ('2', '5', '1', '4')
SELECT * FROM `third_table` WHERE `third_table`.`id` in ('2', '5', '1', '4')
SELECT * FROM `fouth_table` WHERE `fouth_table`.`id` in ('2', '5', '1', '4')
SELECT * FROM `fiveth_table` WHERE `fiveth_table`.`id` in ('2', '5', '1', '4')
"Why" is somewhat of a broad question, it is a design decision made by the framework author. The way to get around it, though it's not very pretty code, is to use eager load constraints:
Model::with([
'first' => function($q) { $q->remember(...); },
'second' => ...
])->remember(...)->get();