Stringsql="select distinct `column_name`,`column_comment` from `information_schema`.`COLUMNS` where `TABLE_SCHEMA` = '"+database+"' and `TABLE_NAME` = '"+tableName+"';";
Stringsql="select distinct `column_name` as columnName,`column_comment` as columnComment from `information_schema`.`COLUMNS` where `TABLE_SCHEMA` = '"+database+"' and `TABLE_NAME` = '"+tableName+"';";