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我有这样的mysql表。如何根据同一行中的其他列值更新mysql表列
table_categories - scid, scname, scimage
我想更新每一行的scimage领域 “/images/subcategories/"scid".png”
update table_categories set scimage = "/images/subcategories/" + <What should i write here, so it take scid value> + ".png"
使用['CONCAT'](http://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_concat):'set scimage = CONCAT(“/ images/subcategories /” ,scid,“.png”)' –
如果'scid'不是'varchar',那么你也必须'CAST'。 –