new MySqlConnection(M_str_sqlcon);
"SELECT value FROM metatableWHERE(ProductID = 16 AND MetaKey = 'SKU') AND " +
"SELECT value FROM metatable WHERE(ProductID =16 AND MetaKey = 'Price') AND "
我还设置了一个名为metaTable的元数据表,它有一个flag column来在查询完成后发出信号.resetflag:0b
(2)检查metaTable中的标志列,如果0b设置为1b。if[select flag from metaTable where id like "A*"=resetflag;update flag:setflag from metaTable where idchkflg:select flag from