Is there any workaround to get unique rows which are in zc_orders table? I only need comments field from zc_zc_orders_status_history (which have duplicate rows). This is my query:
SELECT
zc_orders.orders_id,
zc_orders_status_history.comments,
zc_orders_status_history.orders_status_id,
zc_customers.customers_email_address,
zc_customers.customers_telephone,
zc_customers.customers_firstname,
zc_customers.customers_lastname,
zc_orders_status_history.date_added,
zc_orders.date_purchased
FROM
zc_customers
INNER JOIN zc_orders ON zc_orders.customers_id = zc_customers.customers_id
INNER JOIN zc_orders_status_history ON
zc_orders_status_history.orders_id = zc_orders.orders_id
where zc_orders_status_history.orders_status_id = 8
ORDER BY zc_orders_status_history.date_added DESC
SELECT DISTINCT
zc_orders_status_history.comments,
FROM
zc_customers
INNER JOIN zc_orders ON zc_orders.customers_id = zc_customers.customers_id
INNER JOIN zc_orders_status_history ON
zc_orders_status_history.orders_id = zc_orders.orders_id
where zc_orders_status_history.orders_status_id = 8
ORDER BY zc_orders_status_history.date_added DESC
Related
How can I access data from an outer table in a SELECT, and use it in an WHERE inside a JOIN estructure?
Below is the current query:
SELECT
cvl.id caracteristica_valor_id,
cvl.nome caracteristica_valor_nome,
cvl.valor caracteristica_valor_valor,
ctp.id caracteristica_tipo_id,
ctp.nome caracteristica_tipo_nome,
ctp.codigo caracteristica_tipo_codigo,
ctp.tipo caracteristica_tipo_tipo,
COUNT(DISTINCT var.id_perfil_produto) quantidade_itens
FROM
caracteristica_variacao cvr
INNER JOIN caracteristica_valor cvl ON cvl.id = cvr.id_caracteristica_valor
INNER JOIN caracteristica_tipo ctp ON ctp.id = cvl.id_caracteristica_tipo
INNER JOIN variacao var ON var.id = cvr.id_variacao
INNER JOIN(
SELECT DISTINCT
ppr.id perfil_produto_id
FROM
perfil_produto ppr
INNER JOIN produto pro ON pro.id = ppr.id_produto
INNER JOIN(
SELECT ppr2.id AS id_perfil_sub,a
COUNT(var.id) AS qtd_variacoes,
SUM(var.quantidade_estoque) AS quantidade_estoque,
COALESCE(SUM(var.quantidade_estoque_reservada),0) AS quantidade_estoque_reservada,
MIN(var.disponibilidade) AS disponibilidade,
MIN(var.frete_gratis) AS frete_gratis,
MIN(var.preco_venda) AS preco_venda,
MAX(var.preco_listagem) AS preco_listagem
FROM
variacao var
LEFT JOIN perfil_produto ppr2 ON ppr2.id = var.id_perfil_produto
LEFT JOIN caracteristica_variacao cvr_1 ON cvr_1.id_variacao = var.id
LEFT JOIN caracteristica_valor cvl_1 ON cvl_1.id = cvr_1.id_caracteristica_valor
LEFT JOIN caracteristica_tipo ctp_1 ON ctp_1.id = cvl_1.id_caracteristica_tipo
WHERE
var.disponibilidade = 1
AND(
ctp_1.codigo = 'tamanho' AND cvl_1.valor IN('p')
)
GROUP BY
ppr2.id
) AS grp_var ON grp_var.id_perfil_sub = ppr.id
INNER JOIN produto_categoria prc ON pro.id = prc.produto_id
INNER JOIN categoria cat ON prc.categoria_id = cat.id
WHERE
pro.disponibilidade = 1 AND prc.categoria_id IN (164, 165, 166)
) AS produto ON produto.perfil_produto_id = var.id_perfil_produto
GROUP BY
cvl.id
ORDER BY
ctp.tipo ASC,
ctp.id
I need the field ctp.codigo from the outer table inside thist part:
WHERE
var.disponibilidade = 1
AND(
ctp_1.codigo = 'tamanho' AND cvl_1.valor IN('p')
)
for this section to be as follows:
WHERE
var.disponibilidade = 1
AND(
(ctp.codigo != 'tamanho' AND ctp_1.codigo = 'tamanho' AND cvl_1.valor IN('p'))
OR
(ctp.codigo = 'tamanho')
)
It's not possible to reference columns from the outer query from inside an inline view query.
In the MySQL venacular, the inline view query is called a "derived table". And that name makes sense, because of the way MySQL processes it. The execution plan first materializes the inline view query into a temporary(-ish) table. Once that is done, then the outer query can run, referencing the contents of the derived table.
MySQL doesn't have available the columns from the outer query at the time the inline view query runs.
It is possible to reference columns from the outer query inside a subquery that appears for example in the SELECT list, or in the WHERE clause. We call a subquery that references columns from outer query a "correlated subquery".
I have the following table structure:
tbl_catalogue_state
In tbl_catalogue there is a part number 58674 that has three states in the tbl_catalogue_state_lk table. Here is the result when I run a query inner joining the three tables.
As expected there are multiple rows returned.
Is there a way to only return one row having the values for each catalgue_state_id on the same row?
I would also like the ability to ignore a row for example:
select tbl_catalogue.catalogue_part, tbl_catalogue_state.catalogue_state_id from tbl_catalogue
inner join tbl_catalogue_state_lk on tbl_catalogue.catalogue_id = tbl_catalogue_state_lk.catalogue_id
inner join tbl_catalogue_state on tbl_catalogue_state_lk.catalogue_state_id = tbl_catalogue_state.catalogue_state_id
where tbl_catalogue_state_lk.catalogue_state_id <> 1;
The above select still returns two rows.
UPDATE
I was able to use GROUP_CONCAT:
select tbl_catalogue.catalogue_part, GROUP_CONCAT(tbl_catalogue_state.catalogue_state_id) as cat_state from tbl_catalogue
inner join tbl_catalogue_state_lk on tbl_catalogue.catalogue_id = tbl_catalogue_state_lk.catalogue_id
inner join tbl_catalogue_state on tbl_catalogue_state_lk.catalogue_state_id = tbl_catalogue_state.catalogue_state_id
where tbl_catalogue_state_lk.catalogue_state_id <> 1
group by tbl_catalogue.catalogue_id;
My issue is the above statement still returns a row. I need it to return nothing.
I was able to use not exists:
select tc.catalogue_part, GROUP_CONCAT(tcs.catalogue_state_id) as cat_state from tbl_catalogue as tc
inner join tbl_catalogue_state_lk as tcsl on tc.catalogue_id = tcsl.catalogue_id
inner join tbl_catalogue_state as tcs on tcsl.catalogue_state_id = tcs.catalogue_state_id
where
not exists
(
select tcsl2.catalogue_state_id from tbl_catalogue_state_lk as tcsl2
where tcsl2.catalogue_state_id = 6 and tcsl2.catalogue_id = tc.catalogue_id
)
and
not exists
(
select tcsl3.catalogue_state_id from tbl_catalogue_state_lk as tcsl3
where tcsl3.catalogue_state_id = 1 and tcsl3.catalogue_id = tc.catalogue_id
)
and
not exists
(
select tcsl3.catalogue_state_id from tbl_catalogue_state_lk as tcsl3
where tcsl3.catalogue_state_id = 2 and tcsl3.catalogue_id = tc.catalogue_id
)
group by tc.catalogue_id;
I have the following query
SELECT custconcompany, custconfirstname, custconlastname, custconemail, custconphone, shipaddress1, shipaddress2, shipcity, stateabbrv, shipzip, countryname, websitecheck.formfieldfieldvalue websitevalue, excludecheck.formfieldfieldvalue excludevalue
FROM obcisc_customers
JOIN ( (obcisc_shipping_addresses JOIN obcisc_countries
ON obcisc_shipping_addresses.shipcountryid = obcisc_countries.countryid)
LEFT JOIN obcisc_country_states
ON obcisc_shipping_addresses.shipstateid = obcisc_country_states.stateid
LEFT JOIN obcisc_formfieldsessions websitecheck
ON obcisc_shipping_addresses.shipformsessionid = websitecheck.formfieldsessioniformsessionid
LEFT JOIN obcisc_formfieldsessions excludecheck
ON obcisc_shipping_addresses.shipformsessionid = excludecheck.formfieldsessioniformsessionid)
ON obcisc_customers.customerid = obcisc_shipping_addresses.shipcustomerid
WHERE custgroupid = 11
AND websitecheck.formfieldfieldid = 24
AND excludecheck.formfieldfieldid = 30
AND excludecheck.formfieldfieldvalue != 'a:1:{i:0;s:3:"Yes";}'
ORDER BY shipstate, shipcity
This works great except I also need it to return rows where "excludecheck.formfieldfieldid=30" does not exist... right now it's not returning them
When writing a LEFT JOIN, any criteria on the table you're joining with should be put into the ON clause. If you put it into the WHERE clause, you'll filter out the results in the first table that don't have a matching row in the second table, because the NULL value that comes from the outer join will not match the criteria.
SELECT custconcompany, custconfirstname, custconlastname, custconemail, custconphone, shipaddress1, shipaddress2, shipcity, stateabbrv, shipzip, countryname, websitecheck.formfieldfieldvalue websitevalue, excludecheck.formfieldfieldvalue excludevalue
FROM obcisc_customers
JOIN obcisc_shipping_addresses
ON obcisc_customers.customerid = obcisc_shipping_addresses.shipcustomerid
JOIN obcisc_countries
ON obcisc_shipping_addresses.shipcountryid = obcisc_countries.countryid)
LEFT JOIN obcisc_country_states
ON obcisc_shipping_addresses.shipstateid = obcisc_country_states.stateid
LEFT JOIN obcisc_formfieldsessions websitecheck
ON obcisc_shipping_addresses.shipformsessionid = websitecheck.formfieldsessioniformsessionid
AND websitecheck.formfieldfieldid = 24
LEFT JOIN obcisc_formfieldsessions excludecheck
ON obcisc_shipping_addresses.shipformsessionid = excludecheck.formfieldsessioniformsessionid
AND excludecheck.formfieldfieldid = 30
AND excludecheck.formfieldfieldvalue != 'a:1:{i:0;s:3:"Yes";}')
WHERE custgroupid = 11
ORDER BY shipstate, shipcity
Another way to do it is by putting (excludecheck.formfieldfieldid = 30 OR excludecheck.formfieldfieldid IS NULL) in the WHERE clause. But this is more verbose and also I believe it's harder for MySQL to optimize, especially if you have several tables you're joining like this.
I use the following MySQL to return a list of posts and their corresponding comments.
SELECT *
FROM forum_qa
JOIN user_profiles
ON user_id = forum_qa_author_id
LEFT JOIN (SELECT forum_cm_id,
forum_cm_author_id,
forum_qa_id_fk,
forum_cm_text,
FROM forum_cm
JOIN user_profiles
ON user_id = forum_cm_author_id) AS c
ON forum_qa_id = c.forum_qa_id_fk
WHERE forum_qa_parent_id = $forum_qa_id
If I run
$data['num_answers'] = $query->num_rows();
This allows me to get the number of returned rows and pass the array to my controller and view.
But this is returning all rows (posts + comments). So if 1 post has 10 comments, it returns 10.
How could I have this query count only the number of posts (ie, returning 1) not including the subquery?
Each post has a unique id saved in forum_qa.forum_qa_id
Each comment has a unique id saved in forum_cm.forum_cm_id.
Thanks for helping -- will post more code if needed.
Not the fastest, but you are not restricted in using GROUP BY:
SELECT *,
(SELECT COUNT(*) FROM forum_qa WHERE forum_qa_parent_id = $forum_qa_id) Cnt
FROM forum_qa
JOIN user_profiles
ON user_id = forum_qa_author_id
LEFT JOIN (SELECT forum_cm_id,
forum_cm_author_id,
forum_qa_id_fk,
forum_cm_text,
FROM forum_cm
JOIN user_profiles
ON user_id = forum_cm_author_id) AS c
ON forum_qa_id = c.forum_qa_id_fk
WHERE forum_qa_parent_id = $forum_qa_id
You can run another query or add one more column (with an independent subquery) in the result set:
SELECT *
, ( SELECT COUNT(*)
FROM forum_qa
WHERE forum_qa_parent_id = $forum_qa_id
) AS cntPosts
FROM forum_qa
JOIN user_profiles
ON user_id = forum_qa_author_id
LEFT JOIN (SELECT forum_cm_id,
forum_cm_author_id,
forum_qa_id_fk,
forum_cm_text,
FROM forum_cm
JOIN user_profiles
ON user_id = forum_cm_author_id) AS c
ON forum_qa_id = c.forum_qa_id_fk
WHERE forum_qa_parent_id = $forum_qa_id
COUNT(DISTINCT forum_qa.forum_qa_id)
COUNT(DISTINCT col_name) counts the distinct post ids. This should equal the number of posts.
To begin with I have 4 tables I am dealing with.
I have a classes table that is a 1->N relationship with a sections table which also has a 1->N relationship with a lessons table.
So to put it in perpective:
Classes
Sections
Lessons
The last table is an activityLog, when the student accesses a lesson this is recorded using the following:
ActivityLog Row -> actorID (user ID), classID, sectionID, lessonID
I want to pull out the last 5 unique lessons the student has visited. I tried using both DISTINCT and GROUP BY without success.
The same records are being returned each time, not the latest classes that they have visited.
Using GROUP BY
SELECT activityLog.actorID, activityLog.activityDate,
strClasses.classID, strClasses.className,
strSections.sectionID, strSections.sectionName,
strLessons.lessonID, strLessons.lessonName
FROM activityLog
LEFT JOIN strClasses ON strClasses.classID = activityLog.classID
LEFT JOIN strSections ON strSections.sectionID = activityLog.sectionID
LEFT JOIN strLessons ON strLessons.lessonID = activityLog.lessonID
WHERE activityLog.activityTypeID = 6 AND activityLog.actorID = 3
GROUP BY activityLog.lessonID
ORDER BY activityLog.activityDate DESC
LIMIT 5
Using DISTINCT
SELECT DISTINCT activityLog.actorID,
strClasses.classID, strClasses.className,
strSections.sectionID, strSections.sectionName,
strLessons.lessonID, strLessons.lessonName
FROM activityLog
LEFT JOIN strClasses ON strClasses.classID = activityLog.classID
LEFT JOIN strSections ON strSections.sectionID = activityLog.sectionID
LEFT JOIN strLessons ON strLessons.lessonID = activityLog.lessonID
WHERE activityLog.activityTypeID = 6 AND activityLog.actorID = 3
ORDER BY activityLog.activityDate DESC
LIMIT 5
I cannot figure out why the latest records are not being displayed.
Based on your change, how does this suit you?
SELECT activityLog.actorID, activityLog.activityDate,
strClasses.classID, strClasses.className,
strSections.sectionID, strSections.sectionName,
strLessons.lessonID, strLessons.lessonName
FROM activityLog
LEFT JOIN strClasses ON strClasses.classID = activityLog.classID
LEFT JOIN strSections ON strSections.sectionID = activityLog.sectionID
LEFT JOIN strLessons ON strLessons.lessonID = activityLog.lessonID
WHERE activityLog.activityTypeID = 6 AND activityLog.actorID = 3
AND activityLog.activityDate = (SELECT MAX(activityDate) FROM activityLog AS lookup WHERE lessonID = activityLog.lessonID)
ORDER BY activityLog.activityDate DESC
LIMIT 5
Based on your description, I'm not sure why you're using LEFT JOIN, but I've left it in just in case.
Try group by like below
GROUP BY activityLog.classID,activityLog.sectionID,activityLog.lessonID
I think it will work, or just sent me create scripts for these I will create that query
Well, there's got to be a datetime in the ActivityLog I hope... so Try this:
Select s.Name, c.ClassName
From Students s
left Join On Classes c
On c.ClassId In
(Select Distinct ClassId From Classes
Where (Select Count(Distinct ClassId) From Classes ic
Join ActivityLog l On l.UserId = s.UserId
And l.ClassId = c.ClassId
Where classId = c.ClassId
And activityDateTime > l.activityDateTime)
< 5)