I've developed a query which selects events from Wordpress. I am using the where clause to select where the meta_value of the meta_key eventstartdate is after today.
The issue I'm having now is, I also want filter on a second meta_value that being from the meta_key '_VenueCity'.
I have tried aliasing the wp_postmeta table and doing a where on the meta_key but I think I'm missing a join.
This is the code that works without my additional code to get it to work. Can any one advise on how I get this to work?
SELECT
`wp_posts`.`ID` AS `EventID`,
`wp_posts`.`post_parent` AS `SeriesID`,
`wp_posts`.`post_title` AS `EventTitle`,
`wp_posts`.`post_content` AS `EventDescription`,
`wp_posts`.`post_excerpt` AS `EventSummary`,
`wp_posts`.`post_name` AS `EventSlug`,
min(`wp_postmeta`.`meta_value`) AS `EventStartDate`,
max(`tribe_event_end_date`.`meta_value`) AS `EventEndDate`,
`wp_posts`.`guid` AS `GUID`
FROM ((`wp_posts`
JOIN `wp_postmeta` ON
(
(`wp_posts`.`ID` = `wp_postmeta`.`post_id`)
))
LEFT JOIN `wp_postmeta` `tribe_event_end_date` ON
(
(
(`wp_posts`.`ID` = `tribe_event_end_date`.`post_id`) AND
(`tribe_event_end_date`.`meta_key` = '_EventEndDate')
)
))
WHERE
(
(`wp_postmeta`.`meta_key` = '_EventStartDate') AND
(`wp_posts`.`post_type` = 'tribe_events') AND
(`wp_posts`.`post_status` = 'publish') AND
(`tribe_event_end_date`.`meta_value` >= CURDATE())
)
GROUP BY
`wp_posts`.`ID`
ORDER BY
`EventStartDate`,
`wp_posts`.`post_date`;
I am not going to write your query for you but I will give an example of how to get multiple postmeta values. The power will be in the where clause to get the right values.
You should also consider what joins you want to use.
SELECT
p.post_title,
pm1.meta_value,
pm2.meta_value
FROM wp_posts as p
INNER JOIN wp_postmeta as pm1
ON p.ID = pm1.post_id
INNER JOIN wp_postmeta as pm2
ON p.ID = pm2.post_id
WHERE
pm1.meta_key = '_my_postmeta_field1'
AND
pm2.meta_key <> '_not_this_field'
Related
I am trying to pull data from a subsite's posts and postmeta tables:
SELECT xyz_8_posts.ID,
(select xyz_8_postmeta.meta_value
from xyz_8_postmeta
inner join xyz_8_posts
on xyz_8_postmeta.post_id = xyz_8_posts.ID
where xyz_8_postmeta.meta_key = 'presentation_title'
AND xyz_8_postmeta.post_id = xyz_8_posts.ID
) as 'Presentation Title'
FROM xyz_8_posts
WHERE xyz_8_posts.post_type = "presenters"
I'm getting a "Subquery returns more than 1 row" error. I don't understand why this is. If I replace xyz_8_posts.ID in the WHERE clause with an actual ID the query returns one title.
You have an extra JOIN where you just want a correlated subquery:
SELECT p.ID,
(select pm.meta_value
from xyz_8_postmeta pm
where pm.post_id = p.ID and
pm.meta_key = 'presentation_title'
) as Presentation_Title
FROM xyz_8_posts p
WHERE p.post_type = 'presenters'
I have this query:
SELECT *
FROM `wp_postmeta`
WHERE `meta_key` = '_test'
AND `post_id` IN (SELECT post_id FROM `wp_postmeta`
where meta_value = 8023)
Returns the SQL error:
Table 'wp_postmeta' is specified twice, both as a target for 'UPDATE'
and as a separate source for data
I have read other answers and attempting to add a further SELECT * FROM ( ) around the sub query but didn't help.
I assume I need some form of AS in here but can't figure out the exact code.
Can you rewrite the query in the format that won't trigger the error?
The same for this similar query:
UPDATE wp_postmeta
SET meta_value = 5.55
WHERE meta_key = '_regular_price'
AND post_id IN (
SELECT post_id
FROM wp_postmeta
WHERE meta_value = 8023
)`
You can use alias for table name
(and as suggestion in your case you can also use join instead of in )
SELECT a.*
FROM `wp_postmeta` a
inner join `wp_postmeta` b on a.`post_id = b.post_id
where a.`meta_key` = '_test'
and b.meta_value = 8023
In update you could use a join with subselect for circumvent the limits due to update actions on the same table
UPDATE wp_postmeta a
inner join (
SELECT post_id
FROM wp_postmeta
WHERE meta_value = 8023
) t on a.`post_id = t.post_id and a.`meta_key` = '_test'
SET meta_value = 5.55
SELECT * FROM wp_postmeta as wp_out
WHERE wp_out.meta_key = '_test'
AND wp_out.post_id IN
( SELECT wp_in.post_id
FROM wp_postmeta as wp_in
where wp_in.meta_value = 8023)
Although this is not a good answer, but it is effective, ha ha..
SELECT *
FROM wp_postmeta
WHERE meta_key = '_test'
AND post_id IN (SELECT GROUP_CONCAT(post_id) FROM wp_postmeta
where meta_value = 8023)
The SELECT query posted in the question is equivalent to this one:
SELECT p1.*
FROM `wp_postmeta` p1
INNER JOIN `wp_postmeta` p2 ON p1.`post_id` = p2.`post_id`
WHERE p1.`meta_key` = '_test'
AND p2.`meta_value` = 8023
In fact, if some conditions are met, the MySQL engine converts the original SELECT query into a query similar to this as an optimization.
This SELECT query can be easily changed into the desired UPDATE query:
UPDATE `wp_postmeta` p1
INNER JOIN `wp_postmeta` p2 ON p1.`post_id` = p2.`post_id`
SET p1.`meta_values` = 5.55
WHERE p1.`meta_key` = '_test'
AND p2.`meta_value` = 8023
I am trying to construct a select statement. The table structure is shown below. I am basically looking to select the three fields on the left table along with the meta_values of the right hand side table that have a meta_key of responsible_service and responsible_officer. These meta_values may or may not exist.
My awful attempt looks like this.
SELECT
`wp_posts`.`ID`,
`wp_posts`.`post_content`,
`wp_posts`.`post_title`
FROM(
`wp_posts`
INNER JOIN `wp_postmeta` ON (`wp_posts`.`ID` = `wp_postmeta`.`post_id`),
(Select `wp_postmeta`.meta_value where`wp_postmeta`.meta_key='responsible_officer') as Responsible Officer),
(Select `wp_postmeta`.meta_value where `wp_postmeta`.meta_key='responsible_service') as Responsible Service ),
The result should look like this
This will give you 1 or more rows per wp_posts.ID depending on how many 'responsible_officer' and 'responsible_service' are found. If none are found meta_key and meta_value will be null
SELECT
`wp_posts`.`ID`,
`wp_posts`.`post_content`,
`wp_posts`.`post_title`,
max(case `wp_postmeta`.meta_key
when 'responsible_officer' then `wp_postmeta`.meta_value end) as responsible_officer,
max(case `wp_postmeta`.meta_key
when 'responsible_service' then `wp_postmeta`.meta_value end) as responsible_service
FROM
`wp_posts`
LEFT JOIN `wp_postmeta` ON `wp_posts`.`ID` = `wp_postmeta`.`post_id`
AND `wp_postmeta`.meta_key in ('responsible_officer', 'responsible_service')
group by `wp_posts`.`ID`,
`wp_posts`.`post_content`,
`wp_posts`.`post_title`;
Check this also:
select postmeta.meta_value, posts.ID, posts.`post_content`,
posts.`post_title` from `wp_posts` posts join `wp_postmeta` postmeta on posts.ID = postmeta.post_id where postmeta.meta_key IN ('responsible_officer', 'responsible_service')
SELECT
`wp_posts`.`ID`,
`wp_posts`.`post_content`,
`wp_posts`.`post_title`
FROM `wp_posts`
JOIN `wp_postmeta` ON (`wp_posts`.`ID` = `wp_postmeta`.`post_id`)
where `wp_postmeta`.meta_key in ('responsible_officer', 'responsible_service')
Hi I know this question may seems familiar but please read the full question.
I want to get Wordpress post title,featured image,content using a mysql query.
I tried many queries but I'm getting errors.
there is no error and MySQL query returns empty. I am using Wordpress version 4.5.2.
I found this query but it is giving me an empty result.
SELECT p1.*, wm2.meta_value
FROM wp_posts p1
LEFT JOIN wp_postmeta wm1 ON (
wm1.post_id = p1.id
AND wm1.meta_value IS NOT NULL
AND wm1.meta_key = '_thumbnail_id'
)
LEFT JOIN
wp_postmeta wm2
ON (
wm1.meta_value = wm2.post_id
AND wm2.meta_key = '_wp_attached_file'
AND wm2.meta_value IS NOT NULL
)LEFT JOIN
wp_term_relationships wtr
ON
(
object_id=p1.id
)
WHERE
p1.post_status='publish'
AND p1.post_type='post'
AND 'term_taxonomy_id'='454'
ORDER BY p1.post_date DESC
LIMIT 0,10
How can I improve this query to return results?
You have an error in SQL's WHERE clause:
AND 'term_taxonomy_id'='454'
The string 'term_taxonomy_id' will never be equal to the string '454'.
First, to check, remove this condition entirely from your query. If you get results back and you still want to filter by this taxonomy_id then remove the single quote marks around the field name:
SELECT p1.*,
wm2.meta_value
FROM wp_posts p1
LEFT JOIN wp_postmeta wm1 ON (
wm1.post_id = p1.id
AND wm1.meta_value IS NOT NULL
AND wm1.meta_key = '_thumbnail_id'
)
LEFT JOIN wp_postmeta wm2 ON (
wm1.meta_value = wm2.post_id
AND wm2.meta_key = '_wp_attached_file'
AND wm2.meta_value IS NOT NULL
)
LEFT JOIN wp_term_relationships wtr ON (object_id = p1.id)
WHERE p1.post_status = 'publish'
AND p1.post_type = 'post'
AND term_taxonomy_id = '454'
ORDER BY p1.post_date DESC LIMIT 0,10
In MySQL you can use backticks around field names, but single quotes are used around string literals. If you mix those up, you'll be in trouble.
If you are still not getting results consider removing the p1.post_status and p1.post_type restrictions to see if you get results back and tweak accordingly.
When i run the below query in mysql it took 78 sec to display record. Is there other way to write this query. Here is my
mysql query -> "
select distinct nuqta1.post_id from wp_postmeta as nuqta1
inner join wp_postmeta as nuqta2 on (nuqta1.post_id = nuqta2.post_id)
inner join wp_postmeta as nuqta4 on (nuqta1.post_id = nuqta4.post_id)
inner join wp_postmeta as nuqta5 on (nuqta1.post_id = nuqta5.post_id)
inner join wp_postmeta as nuqta6 on (nuqta1.post_id = nuqta6.post_id)
inner join wp_postmeta as nuqta7 on (nuqta1.post_id = nuqta7.post_id)
inner join wp_postmeta as nuqta8 on (nuqta1.post_id = nuqta8.post_id)
inner join wp_postmeta as nuqta9 on (nuqta1.post_id = nuqta9.post_id)
inner join wp_postmeta as nuqta10 on (nuqta1.post_id = nuqta10.post_id)
inner join wp_postmeta as nuqta11 on (nuqta1.post_id = nuqta11.post_id)
inner join wp_postmeta as nuqta12 on (nuqta1.post_id = nuqta12.post_id)
where (nuqta2.meta_key = 'checkin' and nuqta2.meta_value LIKE '%10/31/2012%')
and (nuqta4.meta_key = 'guests' and nuqta4.meta_value ='1')
and (nuqta5.meta_key = 'roomtype' and nuqta5.meta_value LIKE '%Entire home/apt%')
and (nuqta6.meta_key = 'price' and cast(nuqta6.meta_value as signed) BETWEEN '10' and '99999')
and (nuqta7.meta_key = 'amenities' and nuqta7.meta_value LIKE '%Wireless Internet%')
and (nuqta8.meta_key = 'amenities' and nuqta8.meta_value LIKE '%TV%')
and (nuqta9.meta_key = 'amenities' and nuqta9.meta_value LIKE '%Kitchen%')
and (nuqta10.meta_key = 'amenities' and nuqta10.meta_value LIKE '%Wireless Internet%')
and (nuqta11.meta_key = 'amenities' and nuqta11.meta_value LIKE '%TV%')
and (nuqta12.meta_key = 'amenities' and nuqta12.meta_value LIKE '%Kitchen%')
and 1=1 order by nuqta1.post_id asc
".
And and i am using wordpress table wp_postmeta to run this query
You have a lot of LIKE '%whatever%' clauses in this query. Each of these clauses necessarily causes a full table scan of wp_postmeta. It's actually pretty good that you got them done in less than ten seconds each.
If you know more about your meta_value column's values, so you can use LIKE 'whatever%' (getting rid of the leading % wildcard term) you'll speed things up a lot.
Also it's not clear why you have nuqta10, nuqta11, nuqta12. Those seem to search for the same stuff as 7,8,9. Considering the cost of the searches, you might consider eliminating those.
Try using Fulltext Search
What you'll do is something like
SELECT
*
FROM
tableName
WHERE
MATCH ( columnName ) AGAINST ( 'Keyword1', 'Keyword2', 'Keyword3' )