Here is the scenario. I have 1 table that has all the contact details. Another table that has all the list of Categories. And a 3rd table which is an associate table, that has the ID of the first table and the ID of the second table.
This is how my associate table looks like
contactdid -2 | categoryid -1
contactdid -2 | categoryid -2
contactdid -2 | categoryid -3
contactdid -3 | categoryid -1
contactdid -3 | categoryid -3
This is my SQL code below(Generated using SQLyog and i included the where clause).
SELECT
press_contacts.email
FROM
contacts_category
INNER JOIN press_category
ON (contacts_category.categoryid = press_category.id)
INNER JOIN press_contacts
ON (contacts_category.contactdid = press_contacts.id)
WHERE contacts_category.categoryid = 1 AND contacts_category.categoryid = 2 ;
I get the output when I do not have AND contacts_category.categoryid = 2inserted in the code.
Any idea how to solve this.I clearly have data.
Thanks in advance for the help.
contacts_category.categoryid can not be 1 and 2 at the same time, perhabs you mean OR instead of AND?
Use OR or IN() instead of AND.
A field can't have two values at the same time
If you only want to see those email addresses with contacts in both categories, try:
SELECT press_contacts.email
FROM contacts_category
INNER JOIN press_contacts
ON (contacts_category.contactdid = press_contacts.id)
WHERE contacts_category.categoryid in (1, 2)
GROUP BY press_contacts.email
HAVING COUNT(DISTINCT contacts_category.categoryid)=2
Related
Sorry I don't know how to describe the topic.
i have a database where i store the unixtime of the entries and some other stuff, in this case the column "name" for the user and "type" it can be 1 or 2.
I want to check if there are entries where name is the same and type switches from 1 to 2 and back to 1 or 2 1 2 within 5 seconds.
So it shows me something like this:
Unixtime Name type
1550293559 Peter 2
1550293560 Peter 1
1550293561 Peter 2
Is there a query that can help me do this?
Sorry I really hope you guys understand that, I don't know how to explain the problem properly.
Thanks.
You can do that with a 3x self join on that table and the necessary conditions (All 3 rows have the same name etc.). See http://www.mysqltutorial.org/mysql-self-join/ for more info.
Note that as the join produces all the possible permutations as input material, you don't have to 'permute' the conditions in the where part of the query. E.g. To get the 5 second rule, you can just say
... where e1.unixtime > e2.unixtime and e2.unixtime > e3.unixtime and e3.unixtime+6 > e1.unixtime ...
Edit: since the original answer was downwoted, here is the full query (grumble grumble) assuming the table name 'sotest':
SELECT
*
FROM
sotest e1
JOIN
sotest e2
JOIN
sotest e3
WHERE
(e1.name = e2.name AND e2.name = e3.name
AND e1.unixtime > e2.unixtime
AND e2.unixtime > e3.unixtime
AND e3.unixtime + 6 > e1.unixtime)
AND ((e1.type = 1 AND e2.type = 2
AND e3.type = 1)
OR (e1.type = 2 AND e2.type = 1
AND e3.type = 2))
I have recently taken over a email campaign project and need to generate a report for the customer. However the data has been stored very strangely.
Basically the client wants a report of the subscribers first name and last name that have subscribed to a emailing list.
Example table data.
------------------------------------------------------------
id | owner_id | list_id | field_id | email_address | value
------------------------------------------------------------
1 10 1 137 me#example.com John
2 10 1 138 me#example.com Doe
So as you can see, John Doe has subscribed to mailing list 1, and field_id 137 is his first name and field_id 138 is his last name.
The client is looking for a export with the users first name and last name all is one field.
I tred the following sql query
SELECT value
FROM Table_A AS child
INNER JOIN Table_A AS parent
ON parent.email_address = child.email_address
WHERE child.owner_id = '10'
But unfortunately the query gives me the results in many rows but not appending the first name and last name into one field,
If anyone can provide some assistance that would be awesome.
Thanks.
SELECT
concat( parent.value,' ',child.value)name
FROM mytable AS child
left JOIN mytable AS parent
ON parent.email_address = child.email_address
WHERE child.owner_id = '10'
and parent.field_id=137 and child.field_id=138
Check at-http://sqlfiddle.com/#!9/199b4b/45
I think you have to use a variable to put in there everything you have to and then select the variable with the desired name of yours.
For example:
DECLARE #yourvariable VARCHAR(MAX)
SELECT #yourvariable = COALESCE(#yourvariable + " ") + value
FROM table_A
WHERE owner_id = 10
SELECT #yourvariable as FullName
Try that, it might help.
You can try this code(column name equals value in your original DB):
select a.name
from
table_a a inner join table_a b
on a.email_address = b.email_address and a.field_id <> b.field_id
where a.owner_id=10
order by a.field_id
Here is the example link:
http://sqlfiddle.com/#!9/5fbdf6/25/0
As per assumptions, first name has the field id 137 and last name has the field id 138.
You can try the following query to get the desired result.
SELECT CONCAT(SUBSTRING_INDEX(GROUP_CONCAT(`value`),",",1)," ",SUBSTRING_INDEX(GROUP_CONCAT(`value`),",",-1)) AS client_name
FROM Table_A
WHERE owner_id = 10
AND field_id IN (137, 138)
GROUP BY email_address;
I have two tables.
wp_rg_lead_detail:
id lead_id form_id field_number value
=====================================================
166649 2579 4 235 batman
167324 2602 4 235 batman
168439 2579 4 235 kelsey
169221 2836 4 235 batman
wp_rg_incomplete_submissions:
uuid form_id submission
=======================================================================
fds4389dsd2kjd 4 JSON entry that doesn't contain 'kelsey
ciwod2938slsck 4 JSON entry that contains 'kelsey
392copaa234jfl 4 JSON entry that doesn't contain 'kelsey
What I want to do is grab the record that:
has the word 'kelsey' in wp_rg_incomplete_submissions.submission
has a wp_rg_incomplete_submissions.form_id of 4
has the word 'kelsey' as a value in wp_rg_lead_detail
and the lead_id for that entry in wp_rg_lead_details should also have the word 'batman' for a value.
The only identifier between the two tables is the word 'kelsey'. But where it exists in wp_rg_lead_detail, that lead_id must also have an entry with the value of 'batman'.
I have tried subqueries and joins, and I'm getting nowhere. Can someone please point me in the right direction?
UPDATE
From the feedback below, it sounds like I should create an alias and then join them where that exists in both. Here's where I'm at:
SELECT *, 'kelsey' AS myvalue
FROM `wp_rg_lead_detail`
WHERE (`value` LIKE 'batman'
OR `value` LIKE 'kelsey')
AND `form_id` = 4
GROUP BY `lead_id`
HAVING count(*) > 1
I think somehow I need to join this where the LIKE uses myvalue:
SELECT *, uuid
FROM `wp_rg_incomplete_submissions`
WHERE `form_id` = 4
AND `submission` LIKE concat_ws(";", "%", myvalue, "%")
UPDATE #2
After continuing to struggle with this, I've come up with:
SELECT *
FROM wp_rg_lead_detail
INNER JOIN wp_rg_incomplete_submissions ON wp_rg_lead_detail.value
LIKE CONCAT('%', wp_rg_incomplete_submissions.submission, '%')
WHERE wp_rg_lead_detail.value = 'kelsey'
I know I'm doing something wrong because there are no results. But I feel it is much closer than where I started from.
So here is what I came up with, not vouching for it's efficiency as I don't write much SQL.
SELECT *
FROM submissions
JOIN (SELECT detail.*
FROM detail
JOIN detail detail2
ON detail2.lead_id = detail.lead_id
WHERE detail.value = 'kelsey'
AND detail2.value = 'batman'
) as detailjoin
ON detailjoin.form_id = submissions.form_id
WHERE submissions.submission LIKE '%kelsey%'
AND submissions.form_id = 4;
Which from you data set returns:
'ciwod2938slsck' 4 'JSON with kelsey' 168439 2579 4 235 'kelsey'
So to break it down, the inner join query gets all detail rows that have 'kelsey' as a value where that lead_id also exists in a row with a 'batman' value.
The outer query selects all rows with form_id of 4 and 'kelsey' in submission
Then it simply joins the two on form_id = form_id.
I believe this does what you needed although with the small data set not positive.
I'm fairly sure this is a fairly easy answer but the answer is completely slipping my mind.
I have a database table that is currently formatted like:
event_id | elem_id | value
1 1 Value 1
1 2 Value 2
2 1 Value 3
2 2 Value 4
Both event_id and elem_id are undetermined numbers and have infinite possibilities.
How would I query it for example based on event_id 1 to get the data to be formatted as such:
event_id | 1 | 2
1 Value 1 Value 2
Knowing that elem_id is a number >= n so potentially there could be 50 elem_id yet I still need the data in that format.
Like I said I can't for the life of me figure out the query to assemble it that way. Any help would be GREATLY appreciated.
Try following:
SELECT
`event_id`,
(SELECT t2.`value` FROM table t2 WHERE t2.`event_id` = t1.`event_id` AND t2.`elem_id` = 1),
(SELECT t3.`value` FROM table t3 WHERE t3.`event_id` = t1.`event_id` AND t3.`elem_id` = 2)
FROM `table` t1 GROUP BY `event_id`;
Also you can use different way, and get elem_ids and values in comma-separated format in two cells
SELECT `event_id`, GROUP_CONCAT(`elem_id`), GROUP_CONCAT(`value`) FROM `table` GROUP BY `event_id`;
and you can change separator with following syntax: GROUP_CONCAT(field SEPARATOR '::')
Got this:
Table a
ID RelatedBs
1 NULL
2 NULL
Table b
AID ID
1 1
1 2
1 3
2 4
2 5
2 6
Need Table a to have a comma separated list as given in table b. And then table b will become obsolete:
Table a
ID RelatedBs
1 1,2,3
2 4,5,6
This does not rund through all records, but just ad one 'b' to 'table a'
UPDATE a, b
SET relatedbs = CONCAT(relatedbs,',',b.id)
WHERE a.id = b.aid
UPDATE: Thanks, 3 correct answers (marked oldest as answer)! GROUP_CONCAT is the one to use. No need to insert commas between the ids using relatedids = CONCAT(relatedids,',',next_id) that is done automatic by GROUP_CONCAT.
You'll have to use the mysql group_concat function in order to achieve this: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html#function_group-concat
Look into GROUP_CONCAT(expr)
mysql> SELECT student_name,
-> GROUP_CONCAT(DISTINCT test_score
-> ORDER BY test_score DESC SEPARATOR " ")
-> FROM student
-> GROUP BY student_name;
You can't do that in standard SQL. You could write a stored procedure to do that. I had a similar problem, but I was using PostgreSQL so I was able to resolve it by writing a custom aggregate function so that you can do queries like
select aid, concat(id)
from b group by
aid
Update: MySQL has a group_concat aggregate function so you can do something like
SELECT id,GROUP_CONCAT(client_id) FROM services WHERE id = 3 GROUP BY id
as outlined here.