when fetching data from database php say undefined index for that row which is count(*) as name that name it not defined
SELECT location.location_name,
employers.emp_name,
(SELECT COUNT(present.present_date) AS present_days
from present
WHERE present_status='م' AND present.emp_id=employers.emp_id AND present.present_date between '$date1' AND '$date2') ,
(SELECT COUNT(present.present_status) AS absent_days
from present
WHERE present_status='غ' AND present.emp_id=employers.emp_id AND present.present_date between '$date1' AND '$date2'),
(SELECT COUNT(present.present_status) AS permission_absent_days
from present
WHERE present_status='غب' AND present.emp_id=employers.emp_id AND present.present_date between '$date1' AND '$date2'),
(SELECT band.band_name AS training
from band
WHERE band_name='NoTraining' AND band.emp_id=employers.emp_id AND band.band_date between '$date1' AND '$date2'),
(SELECT COUNT(band.band_name)AS employers_band
from band
WHERE band.emp_id=employers.emp_id AND band.band_date between '$date1' AND '$date2')
FROM `present`, `employers`,`location`,`band`
WHERE present.emp_id = employers.emp_id AND location.location_id = employers.location_id
GROUP BY employers.emp_name
ORDER BY employers.emp_name ASC
The alias assignment should be after the closing paren of the subquery in the SELECT list
SELECT ...
, ( SELECT ... AS foo FROM ... WHERE ... ) AS col_name
-- ^^^^^^^^^^^
FROM
The alias foo assigned inside the subquery doesn't matter to the outer query. What matters to the outer query is the alias assigned to the expression in the SELECT list of the outer query, col_name.
(We can run the query in mysql command line client, and see the assigned to the column in the resultset. Or in the PHP code, we could inspect/vardump the array returned from the fetch.)
Some other issues appear to be semi-Cartesian product, multiple rows returned from multiple child tables cross joined together. Seems to be some join conditions missing.
I recommend ditching the old-school comma syntax for the join operation and using the JOIN keyword instead.
FOLLOWUP
The suggestion above (assigning an alias to the subquery expression in the SELECT list of the outer query, may "work" , but I think there's significantly more wrong with the query.
With the correlated subqueries in the SELECT list, I don't think it's necessary to perform joins to band and present in the outer query. That's going to produce wonky results, when multiple rows are returned and cross joined. And if no matching row is returned from band or present, a row is going to missing from the resultset.
It looks to me (and I'm just guessing because we don't have a specification for what the query is supposed to return) ...
It looks to me like the intent is to return a result equivalent to the one returned by a query of this pattern:
SELECT l.location_name
, e.emp_name
, ( SELECT COUNT(pd.present_date) AS present_days
FROM present pd
WHERE pd.emp_id = e.emp_id
AND pd.present_status = '?'
AND pd.present_date BETWEEN '$date1' AND '$date2'
) AS present_days
, ( SELECT COUNT(ad.present_status)
FROM `present` ad
WHERE ad.emp_id = e.emp_id
AND ad.present_status = '?'
AND ad.present_date BETWEEN '$date1' AND '$date2'
) AS absent_days
, ( SELECT COUNT(pa.present_status)
FROM `present` pa
WHERE pa.emp_id = e.emp_id
AND pa.present_status = '??'
AND pa.present_date BETWEEN '$date1' AND '$date2'
) AS permission_absent_days
, ( SELECT MAX(tr.band_name)
FROM `band` tr
WHERE tr.emp_id = e.emp_id
AND tr.band_name = 'NoTraining'
AND tr.band_date BETWEEN '$date1' AND '$date2'
) AS training
, ( SELECT COUNT(eb.band_name)
FROM `band` eb
WHERE eb.emp_id = e.emp_id
AND eb.band_date BETWEEN '$date1' AND '$date2'
) AS employers_band
FROM `employers` e
JOIN `location` l
ON l.location_id = e.location_id
ORDER
BY e.emp_name ASC
Related
Dummy table:
id FileName DateLastSaved
1 Marium.doc 2015-01-01
2 Amna.doc 2016-01-01
3 Marium.doc 2016-01-01
I want the query to return such rows where FileName is unique in the whole table. Rows should be returned for particular date range.
Suppose date ranges are of 2016 only, so third row should not be returned as FileName is not unique.
The query that I have created is:
$presentquery="SELECT * FROM InitialLog i WHERE MDid='$MDid' AND
(DateLastSaved>='$firstdate' AND DateLastSaved<='$presentdate') AND NOT
EXISTS (SELECT id FROM InitialLog i2 WHERE i2.id<i.id AND i.FileName=i2.FileName )";
(Where $firstdate and $presentdate are 2 dates for date ranges)
The query is returning the accurate results but it's taking time to execute. Is there any other way that I can rewrite this query??
(I have table with many rows)
I put this query together and it returns the results very quickly.
Select *
FROM foo
Where (`datelastsaved` > '2015-12-31' && `datelastsaved` < '2017-01-01')
AND `filename` NOT IN (
Select `filename`
FROM foo
GROUP BY `filename`
HAVING COUNT(*) > 1);
The first part is your normal select statement with the where clauses to filter on the dates.
The second part is the NOT IN where the select statement finds all of the ones with duplicate filenames.
Select `filename` FROM foo GROUP BY `filename` HAVING COUNT(*) > 1)
You can get the same logic using a LEFT JOIN and looking for nulls, that is,
$presentquery = "SELECT DISTINCT i.* FROM InitialLog i
LEFT JOIN InitialLog i2 ON i2.id<i.id AND i.FileName=i2.FileName
WHERE i.MDid='$MDid'
AND i.DateLastSaved>='$firstdate'
AND i.DateLastSaved<='$presentdate'
AND i2.id IS NULL";
This way you are doing a single join rather than subquerying against each value in i.
It looks like you are trying to get the data associated with the first occurrence of each file name, this should work:
SELECT *
FROM InitialLog i
WHERE MDid='$MDid'
AND DateLastSaved>='$firstdate'
AND DateLastSaved<='$presentdate'
AND id IN (SELECT MIN(id) FROM InitialLog GROUP BY FileName)
;
Alternatively, you can do a JOIN with the same subquery instead:
SELECT i.*
FROM InitialLog AS i
INNER JOIN (SELECT MIN(id) AS id
FROM InitialLog
GROUP BY FileName
) AS firsts USING (id)
WHERE i.MDid='$MDid'
AND i.DateLastSaved>='$firstdate'
AND i.DateLastSaved<='$presentdate'
;
I have the following query which works fine (see below).
But when I add a condition, for example AND (specialtyName = '...') the main results are fine, but the GROUP_CONCAT only shows the results that match the condition.
Can anyone please help me with this?
Thanks in advance.
Fred.
SELECT
tblJobs.jobID,
tblJobs.jobName,
DATE_FORMAT(tblJobs.jobDate,'%d-%m-%Y'),
tblCompanies.companyID,
tblCompanies.companyName,
tblCompanies.companyNameConvert,
GROUP_CONCAT(DISTINCT tblSpecialties.specialtyName
ORDER BY FIELD (
specialtyName,
'specialtyName1',
'specialtyName2',
'specialtyName3'),
specialtyName ASC)
AS specialtyNames,
GROUP_CONCAT(DISTINCT tblSpecialties.specialtyNameConvert
ORDER BY FIELD (
specialtyName,
'specialtyName1',
'specialtyName2',
'specialtyName3'),
specialtyName ASC)
AS specialtyNamesConvert,
GROUP_CONCAT(DISTINCT tblRegions.regionName),
GROUP_CONCAT(DISTINCT tblRegions.regionNameConvert)
FROM tblJobs
LEFT JOIN tblCompanies ON
(tblJobs.jobCompany = tblCompanies.companyID)
LEFT JOIN tblSpecialties ON
FIND_IN_SET(tblSpecialties.specialtyID, REPLACE(tblJobs.jobSpecialty,' ',','))
LEFT JOIN tblRegions ON
FIND_IN_SET(tblRegions.regionID, REPLACE(tblJobs.jobRegion,' ',','))
WHERE
AND jobActive = '1'
AND jobDate >= '2013-01-01'
AND companyActive = '1'
GROUP BY jobID
ORDER BY jobDate DESC, jobID DESC, jobCompany DESC
If you say:
WHERE jobActive = '1' AND jobDate >= '2013-01-01' AND companyActive = '1' AND
specialties = XXX
Then you are only going to get exactly those specialties. The filtering is done before the aggregation. As a note: including such conditions in the where clause also turns the outer joins to inner joins. Your joins are probably on properly aligned foreign key relationships, so inner joins may be appropriate.
I'm guessing what you really want is to filter jobs by those having that specialty, but to keep all other information. You want to do the filtering after the aggregation. Do this with a having clause instead of a where clause:
having sum(specialties = XXX) > 0;
This will keep only the rows that have the particular specialty, and keep all the other information.
I suppose that using aliases for your tables and subqueries could resolve your problem.
You can try something like this:
SELECT
tblJobs.jobID,
tblJobs.jobName,
DATE_FORMAT(tblJobs.jobDate,'%d-%m-%Y'),
tblCompanies.companyID,
tblCompanies.companyName,
tblCompanies.companyNameConvert,
(SELECT GROUP_CONCAT(DISTINCT ts.specialtyName
ORDER BY FIELD (
specialtyName,
'specialtyName1',
'specialtyName2',
'specialtyName3'),
specialtyName ASC)
FROM tblSpecialties ts) AS specialtyNames ,
, ... ,
FROM tblJobs
LEFT JOIN tblCompanies ON
(tblJobs.jobCompany = tblCompanies.companyID)
LEFT JOIN tblSpecialties ON
FIND_IN_SET(tblSpecialties.specialtyID, REPLACE(tblJobs.jobSpecialty,' ',','))
LEFT JOIN tblRegions ON
FIND_IN_SET(tblRegions.regionID, REPLACE(tblJobs.jobRegion,' ',','))
WHERE
AND jobActive = '1'
AND jobDate >= '2013-01-01'
AND companyActive = '1'
GROUP BY jobID
ORDER BY jobDate DESC, jobID DESC, jobCompany DESC
I didn't tested this code, but It could help.
My tables are like this:
Table 1 (students)
Table 2 (results)
I want to select all students from Table 1 students who have 4 results in the results table. I tried this query, but with no success:
SELECT *
FROM students
WHERE gender = 'm'
AND (SELECT COUNT( result ) AS count
FROM results
INNER JOIN students ON results.stuID = students.stuID
WHERE result !=0
) =4
ORDER BY rank ASC
You can rewrite your query by using join and HAVING clause to check the count for each student group ,This can be done without using the subquery which sometimes affects on performance
SELECT s.*,COUNT(*) AS count
FROM students s
INNER JOIN results r ON r.stuID = s.stuID
WHERE r.result !=0
GROUP BY s.stuID
HAVING count =4
ORDER BY s.rank ASC
um, that's a little convoluted.
the where clause should come after the subquery, and the subquery still needs to be JOINed back to the main query.
something like
SELECT * FROM students
INNER JOIN (SELECT COUNT(result),results.stuID as count FROM results WHERE result != 0) as result_count
ON result_count.stuID = students.stuID
WHERE result_count.count =4 AND students.gender = 'm'
ORDER BY rank ASC
You have to use alias for table also -
SELECT *
FROM students as a
WHERE gender = 'm'
AND (SELECT COUNT(result) AS count
FROM results as b
WHERE b.stuID = a.stuID AND
(result!=0 OR result IS NOT NULL OR result!='')
) = 4
ORDER BY rank ASC
I currently have this left join as part of a query:
LEFT JOIN movies t3 ON t1.movie_id = t3.movie_id AND t3.popularity = 0
The trouble is that if there are several movies with the same name and same popularity (don't ask, it just is that way :-) ) then duplicate results are returned.
All that to say, I would like to limit the result of the left join to one.
I tried this:
LEFT JOIN
(SELECT t3.movie_name FROM movies t3 WHERE t3.popularity = 0 LIMIT 1)
ON t1.movie_id = t3.movie_id AND t3.popularity = 0
The second query dies with the error:
Every derived table must have its own alias
I know what I'm asking is slightly vague since I'm not providing the full query, but is what I'm asking generally possible?
The error is clear -- you just need to create an alias for the subquery following its closing ) and use it in your ON clause since every table, derived or real, must have its own identifier. Then, you'll need to include movie_id in the subquery's select list to be able to join on it. Since the subquery already includes WHERE popularity = 0, you don't need to include it in the join's ON clause.
LEFT JOIN (
SELECT
movie_id,
movie_name
FROM movies
WHERE popularity = 0
ORDER BY movie_name
LIMIT 1
) the_alias ON t1.movie_id = the_alias.movie_id
If you are using one of these columns in the outer SELECT, reference it via the_alias.movie_name for example.
Update after understanding the requirement better:
To get one per group to join against, you can use an aggregate MAX() or MIN() on the movie_id and group it in the subquery. No subquery LIMIT is then necessary -- you'll receive the first movie_id per name withMIN() or the last with MAX().
LEFT JOIN (
SELECT
movie_name,
MIN(movie_id) AS movie_id
FROM movies
WHERE popularity = 0
GROUP BY movie_name
) the_alias ON t1.movie_id = the_alias.movie_id
LEFT JOIN movies as m ON m.id = (
SELECT id FROM movies mm WHERE mm.movie_id = t1.movie_id
ORDER BY mm.id DESC
LIMIT 1
)
you could try to add GROUP BY t3.movie_id to the first query
Try this:
LEFT JOIN
(
SELECT t3.movie_name, t3.popularity
FROM movies t3 WHERE t3.popularity = 0 LIMIT 1
) XX
ON t1.movie_id = XX.movie_id AND XX.popularity = 0
On MySQL 5.7+ use ANY_VALUE & GROUP_BY:
SELECT t1.id,t1.movie_name, ANY_VALUE(t3.popularity) popularity
FROM t1
LEFT JOIN t3 ON (t3.movie_id=t1.movie_id AND t3.popularity=0)
GROUP BY t1.id
more info
LEFT JOIN only first row
https://dev.mysql.com/doc/refman/5.7/en/group-by-handling.html
Easy solution to left join the 1 most/least recent row is using select over ON phrase
SELECT A.ID, A.Name, B.Content
FROM A
LEFT JOIN B
ON A.id = (SELECT MAX(id) FROM B WHERE id = A.id)
Where A.id is the auto-incremental primary key.
LEFT JOIN (
SELECT id,movie_name FROM movies GROUP BY id
) as m ON (
m.id = x.id
)
// Mysql
SELECT SUM(db.item_sales_nsv) as total FROM app_product_hqsales_otc as db
LEFT JOIN app_item_target_otc as it ON
db.id = (SELECT MAX(id) FROM app_item_target_otc as ot WHERE id = db.id)
and db.head_quarter = it.hqcode
AND db.aaina_item_code = it.aaina_item_code AND db.month = it.month
AND db.year = it.year
WHERE db.head_quarter = 'WIN001' AND db.month = '5' AND db.year = '2022' AND db.status = '1'
This is a bit beyond my skills and I had a lot of help from the good people at SO to get this far. What I need now is to put in a MATCH() ... AGAINST() but I don't know where to insert it?
The query I have is (and this is the short version):
SELECT
SQL_CALC_FOUND_ROWS i.idItems RowCount,
i.* Items,
# Create a JSON formatted field
CONCAT('{',GROUP_CONCAT('"',Attributes.key, '":"', CONVERT(Attributes.value,CHAR),'"'),'}') as Attributes,
IF (te.Key IS NULL,tp.Key,te.Key) as Type,
tc.Value Color,
l.* Location,
c.Name,
c.Mobile,
c.Mail
FROM
(SELECT ItemID, ats.Key, ats.Value FROM attributeStrings as ats
UNION ALL
SELECT ItemID, ati.Key, ati.Value FROM attributeIntegers as ati
) Attributes
JOIN Items i ON
i.idItems = Attributes.ItemID
AND CheckIn >= DATE_SUB('2011-02-16 00:00:00',INTERVAL 90 DAY)
AND CheckIn <= DATE_ADD('2011-02-16 23:59:59',INTERVAL 90 DAY)
AND Checkout IS NULL
LEFT JOIN Customers c ON c.idCustomers = i.CustomerID
LEFT JOIN attributeintegers atli ON atli.itemid = i.idItems AND atli.key = 'Location'
LEFT JOIN locations l ON l.id = atli.value
LEFT JOIN attributestrings atts ON atts.itemid = i.idItems AND atts.key = 'Type' LEFT
JOIN Lists tp ON tp.value = atts.value
LEFT JOIN attributestrings attes ON attes.itemid = i.idItems AND attes.key = 'Tech' LEFT
JOIN Lists te ON te.value = attes.value
LEFT JOIN attributeintegers atci ON atci.itemid = i.idItems AND atci.key = 'Color' LEFT
JOIN Strings tc ON tc.StringID = atci.value
GROUP BY Attributes.ItemID
ORDER BY CheckIn DESC
Now I need to get this statement in here somewhere
MATCH(attributestrings.Value) AGAINST("Nokia" IN BOOLEAN MODE)
As you can see there is a table called attributestrings and it has 3 columns: ItemID,*Key* and Value. I need to search the column Value for the words in the AGAINST() and only show results matching this and the other criterias such as the Date and Checkout above.
I tried to add the statement after the AND Checkout IS NULL like this:
AND Checkout IS NULL
AND MATCH(Attributes.Value) AGAINST("Nokia" IN BOOLEAN MODE)
I had to use the Attributes.Value instead of attributestrings because it didn't found the table. This only resulted in the CONCATENATED column Attributes only contained the value "Nokia", even if there where more to CONCATENATE.
I hope someone are willing to take on this challenge...
// Tank you.
[EDIT]
I tried to put in the WHERE before the GROUP as Tim Fultz sugested, but I get the error
Unknown column 'attributestrings.Value' in 'Where clause'
LEFT JOIN attributeintegers atci ON atci.itemid = i.idItems AND atci.key = 'Color' LEFT JOIN Strings tc ON tc.StringID = atci.value
WHERE MATCH(attributestrings.Value) AGAINST("Nokia Sony" IN BOOLEAN MODE)
GROUP BY Attributes.ItemID
Typically this is put in the Where clause:
WHERE MATCH(attributestrings.Value) AGAINST("Nokia" IN BOOLEAN MODE)
I think I came up with a solution...
I added another:
LEFT JOIN attributestrings fts ON fts.itemid = i.idItems AND MATCH(fts.Value) AGAINST("Nokia Sony" IN BOOLEAN MODE)
Just before the GROUP BY... and then included fts.Value ftsv in the main select statement. Now I could insert a HAVING ftsv IS NOT NULL between GROUP BY... and ORDER BY...
This gave me the result I wanted but the query starts to get a bit slow now...
There is a problem in your query when you are assigning table names with as use every where in you query the name you assigned. Like you gave attributestrings as ats now use ats everywhere and this will work.