更新錶行同桌

Question

table image with columns and rows here

你好，我想LANGUAGE_CODE更新所有行數= RO是與一個與LANGUAGE_CODE = EN（唯一的名字，meta_description，SHORT_DESCRIPTION，描述和head_title相同）我已經嘗試

UPDATE lc_products_info lc LEFT JOIN lc_products_info lc2 ON (lc.product_id=lc2.product_id AND lc.name='' AND lc2.language_code='en') SET lc.name = lc2.name; 

，但它似乎刪除行與leanguage代碼內容= EN如果任何人能幫助我....預先感謝

Answer 1

使用Where：

UPDATE lc_products_info lc 
LEFT JOIN lc_products_info lc2 ON lc.product_id=lc2.product_id AND lc2.language_code='en' SET lc.name = lc2.name 
WHERE lc.name='' 
AND lc.language_code='ro'; 

Answer 2

UPDATE lc SET name=lc2.name FROM lc_products_info lc LEFT JOIN lc_products_info lc2 ON lc.product_id=lc2.product_id AND lc.name='' AND lc2.language_code='en'