從具有不同和限制的列中選擇多個字段

Question

這是我的原始代碼，我只得到標題的結果。

$result = $db->fetchRowList("select Distinct `title` from ".TABLE_ADS." where `title` like '$term%' limit 10");

我想要從其他列和字段中獲取結果

$result = $db->fetchRowList("select Distinct `title` from ".TABLE_ADS." where `title` like '$term%' and ".TABLE_MESSANGES." where `messange` like '$term%'  and ".TABLE_CARS." where `model` like '$term%' limit 10");

Answer 1

我猜您正在嘗試同時從3個不同的表中選擇一個列。 在這種情況下，您想使用Union 。

"(SELECT `title` FROM ".TABLE_ADS." WHERE `title` LIKE '$term%') UNION (SELECT `messange` FROM ".TABLE_MESSANGES." WHERE `messange` LIKE '$term%') UNION (SELECT `model` FROM ".TABLE_CARS." WHERE `model` LIKE '$term%') LIMIT 10"

請務必注意，您將無法分辨哪些行來自哪些表。 您需要添加一個控制列以進行標識，如下所示：

"(SELECT `title`, 'ad' as `table` FROM ".TABLE_ADS." WHERE `title` LIKE '$term%') UNION (SELECT `messange`, 'messange' as `table` FROM ".TABLE_MESSANGES." WHERE `messange` LIKE '$term%') UNION (SELECT `model`, 'car' as `table` FROM ".TABLE_CARS." WHERE `model` LIKE '$term%') LIMIT 10"