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csdn
12 年
mysql_stmt_send_long_data 能支持update语句吗?
sprintf(sql,"update DATE1 set Photo=? and Size=%d where UserID='%s'",iSize,AccountID); MYSQL_STMT* smtt = NULL; 新增这样的操作。那么更新怎么办?需要把原数据delete?再插入?这样效率降低了把! 那么二进制数据如何执行更新呢?
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