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Distinct語句用于mysql一次只返回一個唯一結(jié)果

Distinct語句用于mysql一次只返回一個唯一結(jié)果

PHP
UYOU 2021-08-28 08:57:38
共有三張表:tbl住宿表--------------  -----------------------fldProductID     fldAccommodationName--------------  -----------------------tbl住宿表-------------  --------------------  ---------------------fldProductID   fldAccommodationText  fldAccommodationText1-------------  --------------------  ---------------------tbl住宿表------------  --------fldProductID  seo_url------------  --------具有不同的三表連接查詢$sql = "SELECT         DISTINCT         tblAccommodation.fldProductID,        tblAccommodationText.fldAccommodationTextTitle,        seo_url,        tblAccommodation.fldAccommodationName    FROM tblAccommodation     LEFT JOIN tblAccommodationText         ON tblAccommodationText.fldProductID = tblAccommodation.fldProductId    LEFT JOIN tblProduct        ON tblProduct.fldProductID = tblAccommodation.fldProductID    WHERE        seo_url = 'yacht-4'";代碼結(jié)果------------ ------------------------- ------- ------ --------------fldProductID fldAccommodationTextTitle seo_url fldAccommodationName------------ ------------------------- ------- ------ --------------6 海豚別墅 4 游艇 4 上艙6 Aqua Suite 游艇 - 4 Aqua Suite with Pool6 海豚別墅 4 游艇 4 上艙6 Aqua Suite 游艇 - 4 Aqua Suite with Pool為什么重復(fù)相同的值兩次請幫幫我
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1 回答

?
慕蓋茨4494581

TA貢獻(xiàn)1850條經(jīng)驗 獲得超11個贊

您可以使用GROUP BY


SELECT tblAccommodation.fldProductID,fldAccommodationText1,tblAccommodationText.fldAccommodationTextTitle,seo_url,tblAccommodation.fldAccommodationName 

    FROM tblAccommodation 

        LEFT JOIN tblAccommodationText ON tblAccommodationText.fldProductID = tblAccommodation.fldProductID 

        LEFT JOIN tblProduct ON tblProduct.fldProductID = tblAccommodation.fldProductID 

        WHERE seo_url='yacht-4' 

    GROUP by tblAccommodationText.fldAccommodationTextTitle


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?
一只斗牛犬

TA貢獻(xiàn)1784條經(jīng)驗 獲得超2個贊

代碼首先工作我刪除distinct并按功能在group后添加....


正確的查詢是


$ SQL =“SELECT tblAccommodation.fldProductID,fldAccommodationText1,tblAccommodationText.fldAccommodationTextTitle,seo_url,tblAccommodation.fldAccommodationName FROM tblAccommodation LEFT JOIN tblAccommodationText ON tblAccommodationText.fldProductID = tblAccommodation.fldProductID LEFT JOIN tblProduct ON tblProduct.fldProductID = tblAccommodation.fldProductID其中seo_url ='yacht- 4' GROUP by tblAccommodationText.fldAccommodationTextTitle"


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