使用AND/OR逻辑运算符的SQL查询

2010-11-09 85 views 0 likes

fI似乎是一个相对简单的AND/OR子句，它让我头疼。使用AND/OR逻辑运算符的SQL查询

$query = "SELECT stv.name,stc.tmplvarid,stc.contentid,stv.type,stv.display,stv.display_params,stc.value"; 
$query .= " FROM ".$tb1." stc LEFT JOIN ".$tb2." stv ON stv.id=stc.tmplvarid "; 
$query .= " LEFT JOIN $tb_content tb_content ON stc.contentid=tb_content.id "; 
$query .= " WHERE stv.name='".$region."' AND stc.contentid IN (".implode($cIDs,",").") "; 
$query .= " OR stv.name='".$countries."' AND stc.contentid IN (".implode($cIDs,",").") "; 
$query .= " AND tb_content.pub_date >= '$pub_date' "; 
$query .= " AND tb_content.published = 1 "; 
$query .= " ORDER BY stc.contentid ASC;";

我需要从两个$region和$countries检索值。但是，它只是返回值$countries。如果我删除OR的行，它将返回值$region，但它不会同时返回。我做错了什么？

来源

2010-11-09 Vecta

回答

尝试把括号条款的OR的两侧。见下：

$query = "SELECT stv.name,stc.tmplvarid,stc.contentid,stv.type,stv.display,stv.display_params,stc.value"; 
$query .= " FROM ".$tb1." stc LEFT JOIN ".$tb2." stv ON stv.id=stc.tmplvarid "; 
$query .= " LEFT JOIN $tb_content tb_content ON stc.contentid=tb_content.id "; 
$query .= " WHERE (stv.name='".$region."' AND stc.contentid IN (".implode($cIDs,",").")) "; 
$query .= " OR (stv.name='".$countries."' AND stc.contentid IN (".implode($cIDs,",").")) "; 
$query .= " AND tb_content.pub_date >= '$pub_date' "; 
$query .= " AND tb_content.published = 1 "; 
$query .= " ORDER BY stc.contentid ASC;";

来源

2010-11-09 15:45:00 RedFilter

谢谢，但它仍然只是返回$国家。如果有帮助，以下是完整的功能：http://pastebin.com/E4CdnQNj – Vecta 2010-11-09 15:51:51

看起来你缺少括号，不是吗？

A或B和C或d是模糊的，你需要使用括号要清楚你的意思（A或B）和（C或d）

来源

2010-11-09 15:48:47

使用AND/OR逻辑运算符的SQL查询

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