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phpmysql購(gòu)物車代碼(php和mysql如何實(shí)現(xiàn)購(gòu)物車的功能)
1如果沒(méi)有把DD設(shè)置為常量， DD應(yīng)該換成相應(yīng)的數(shù)字或變量，假如stu_id為int型，則應(yīng)為 lt？PHP sql = quotselect * from STUDENT where room = select room from STUDENT where stu_id = 1quot？ 或 l...