我正在使用JDBC驱动程序和ResultSet读写mysqlJSON类型。如何将ResultSet中的JSON类型提取为字符串JSON,以便用于java程序?mysql> set names UTF8MB4; // so that json values can be inserted using jdbc driver otherwise it was complainingString myjsonString = "{x: y}";
: "New York", townSize: 25, duration: 408我有一个sql查询来选择要显示的结果Call_Setup_Success_Rate WHERE dat BETWEEN '$date_begin' AND '$date_fin' AND nomcel='$cell'";
$te = mysql</em