invoice_hearing_aids t2 WHERE t2.contact_id = invoice_hearing_aids.contact_id) ) sel
LEFT JOIN hearing_aid_makes makes ON makes.id= sel.make_id
LEFT JOIN contacts ON contacts.id = sel.
我想使用join和left join来显示我的数据库。但看起来效果不太好。pdt.ProductName,dbpjs.CodeName,ordercustline.id as oid, pdt.LanguageID LEFT JOINproducts ON products.id = ordercustline.ProductID JO
.*, b.id, b.name, b.subject, b.url FROM news AS nf JOIN blog_news AS fnb ON nf.id1=fnb.id1 JOIN blog我尝试在php中使用while循环来显示结果,但在while循环开始之前我收到了一个mysql_fetch_error()。我的目标也是让每个表在DESC顺序中按order_id排序。
这个想法是,在给定的一天中有两种用餐选择,例如:10/02/16 meal id 4 OR meal id 12select * from meals JOIN menu ON meals.id = menu.option1 AND meals.id=menu.option2
但每次我运行这个命令时,我都会收到一条错误消息
如何显示一行中的所有记录,即使存在空值,例如sub1和sub2和sub3的值不为空值,反之亦然。任何帮助都将不胜感激,因为我现在几乎整个下午都在处理这个查询解决方案。curdate())=YEAR(paidd) GROUP BY y,INNER JOINcurdate())=YEAR(pdate2) GROUP BY y,
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