По същество правите Съюз на ЛЯВО и ДЯСНО ПРИСЪЕДИНЯВАНЕ.
Всъщност имате интересна бръчка, тъй като искате да ограничите редовете до 3. За да разрешите това, трябва да
- Ограничете и двете Избиранията „ляво“ и „дясно“ с 3
- След това използвайте резултата от UNION във вграден изглед
- след това ограничете съюза отново с 3
АКТУАЛИЗИРАНЕ За съжаление, освен ако не греша, не можете да направите това директно в UNION, така че трябва да добавите още един слой вградени изгледи преди UNION
ОГРАНИЧЕНИЯТА вътре в UNION ще предложат някаква полза от производителността и след това лимита ще ви даде правилните резултати.
SELECT title,
teaser,
nid,
DATE,
image,
image_tid
FROM (SELECT title,
teaser,
nid,
DATE,
image,
image_tid,
created
FROM (SELECT DISTINCT n.title,
nr.teaser,
n.nid,
Date_format(From_unixtime(n.created),
'%M %e, %Y') AS
DATE,
f.filepath
AS
image,
tn_img.tid
AS
image_tid
,
n.created
FROM node n
JOIN node_revisions nr
ON n.nid = nr.nid
LEFT JOIN content_field_related_images cfri
ON ( n.nid = cfri.nid
AND cfri.delta = 0 )
LEFT JOIN content_field_att_file cfaf
ON cfri.field_related_images_nid = cfaf.nid
LEFT JOIN files f
ON cfaf.field_att_file_fid = f.fid
JOIN term_node tn2
ON n.nid = tn2.nid
LEFT OUTER JOIN term_node tn_img
ON cfri.field_related_images_nid = tn_img.nid
WHERE n.status = 1
AND n.TYPE = 'article'
AND nr.body LIKE '%kimberly-clark%'
AND tn2.tid = 143
ORDER BY n.created DESC
LIMIT 3) tleft
UNION
SELECT title,
teaser,
nid,
DATE,
image,
image_tid,
created
FROM (SELECT DISTINCT n.title,
nr.teaser,
n.nid,
Date_format(From_unixtime(n.created),
'%M %e, %Y') AS
DATE,
f.filepath
AS
image,
tn_img.tid
AS
image_tid
,
n.created
FROM node n
JOIN node_revisions nr
ON n.nid = nr.nid
LEFT JOIN content_field_related_images cfri
ON ( n.nid = cfri.nid
AND cfri.delta = 0 )
LEFT JOIN content_field_att_file cfaf
ON cfri.field_related_images_nid = cfaf.nid
LEFT JOIN files f
ON cfaf.field_att_file_fid = f.fid
JOIN term_node tn2
ON n.nid = tn2.nid
RIGHT OUTER JOIN term_node tn_img
ON cfri.field_related_images_nid = tn_img.nid
WHERE n.status = 1
AND n.TYPE = 'article'
AND nr.body LIKE '%kimberly-clark%'
AND tn2.tid = 143
ORDER BY n.created DESC
LIMIT 3) tright) t
ORDER BY created DESC
LIMIT 3
АКТУАЛИЗИРАНЕ Използвайки предложенията spencer7593 и ypercube, ето алтернативен подход, използващ два оператора UNION ALL и без вградени изгледи.
SELECT DISTINCT n.created,
n.title,
nr.teaser,
n.nid,
Date_format(From_unixtime(n.created), '%M %e, %Y') AS DATE,
f.filepath AS image,
tn_img.tid AS image_tid
FROM node n
JOIN node_revisions nr
ON n.nid = nr.nid
LEFT JOIN content_field_related_images cfri
ON ( n.nid = cfri.nid
AND cfri.delta = 0 )
LEFT JOIN content_field_att_file cfaf
ON cfri.field_related_images_nid = cfaf.nid
LEFT JOIN files f
ON cfaf.field_att_file_fid = f.fid
JOIN term_node tn2
ON n.nid = tn2.nid
LEFT OUTER JOIN term_node tn_img
ON cfri.field_related_images_nid = tn_img.nid
WHERE n.status = 1
AND n.TYPE = 'article'
AND nr.body LIKE '%kimberly-clark%'
AND tn2.tid = 143
UNION ALL
SELECT DISTINCT n.created,
n.title,
nr.teaser,
n.nid,
Date_format(From_unixtime(n.created), '%M %e, %Y') AS DATE,
f.filepath AS image,
tn_img.tid AS image_tid
FROM node n
JOIN node_revisions nr
ON n.nid = nr.nid
LEFT JOIN content_field_related_images cfri
ON ( n.nid = cfri.nid
AND cfri.delta = 0 )
LEFT JOIN content_field_att_file cfaf
ON cfri.field_related_images_nid = cfaf.nid
LEFT JOIN files f
ON cfaf.field_att_file_fid = f.fid
JOIN term_node tn2
ON n.nid = tn2.nid
RIGHT JOIN term_node tn_img
ON cfri.field_related_images_nid = tn_img.nid
WHERE n.status = 1
AND n.TYPE = 'article'
AND nr.body LIKE '%kimberly-clark%'
AND tn2.tid = 143
AND cfri.field_related_images_nid IS NULL
ORDER BY 1 DESC
LIMIT
3
