MySQL does allow using ORDER BY in the queries merged with UNION or UNION ALL. October 30, 2012. The first select query returns data related to the exact place search .

The SQL ORDER BY Keyword. Use UNION if you want to select rows one after the other from several tables or several sets of rows from a single table all as a single result set. We can use ORDER BY with this to filter records. To do this, we just need to wrap each query into a set of parentheses: ( SELECT value1 AS value FROM grouping GROUP BY value1 ORDER BY NULL ) UNION ( SELECT value2 AS value FROM grouping GROUP BY value2 ORDER BY NULL ) LIMIT 10 We can use ORDER BY with this to filter records. I often see developers trying following syntax while using ORDER BY. You can use UNION ALL to avoid sorting, but UNION ALL will return duplicates. SQL Union with results in Order of Union. Use UNION if you want to select rows one after the other from several tables or several sets of rows from a single table all as a single result set. I'm surprised you see this order: UNION without ALL implies DISTINCT which in turn is usually implemented by a sort by a primary-or-otherwise-unique key if one exists ... MySQL: Optimize UNION with “ORDER BY” in … I am fetching different types of record based on different criteria from a table based on distance for a search on my site. 本日はMySQLで2テーブルの、フィールド名が違う2フィールドを結合し、ソートするテクニックをご紹介します。 複数SELECT文の結合はUNIONを使いますが、ネットを検索しても、なかなか異なるフィールド名を結合してからのソートが掲載されてなかったので、ブログに書きました。 Instead of this approach SELECT UNION all the tables and, in the final result you can ORDER BY the Close Date:data:200 as DESC. Without a transformation, a statement that contains both ORDER BY and UNION would require two separate sorting steps-one to satisfy ORDER BY and one to satisfy UNION (Currently Derby uses sorting to eliminate duplicates from a UNION. UNION を使って取得したデータを結合する場合に、それぞれの SELECT 文に対して ORDER BY 句や LIMIT 句を設定する場合は SELECT 文を括弧で囲った上で各 SELECT 文に対して設定してください。 mysqlでunionとorder by句を使用する (6) これは、結果セット全体をソートしているため、ソートしたり、ユニオンのすべての部分を別々にソートしたり、ORDER BY（何かサブクエリ距離）を使用することができます。

ORDER BY Syntax Looks like you are sorting by close_date column in all the tables in DESC order then UNION. 今回は前半で「UNIONの種類」「UNIONの使い方」といった基礎的な内容を見ていきましょう。そして後半で、よく疑問として上がるUNION後に「ORDER BY」などをかける方法について見てきましょう。 SELECT {fieldName(s) | *} FROM tableName(s) is the statement containing the fields and table(s) from which to get the result set from. HERE. UNION ALL 演算子でつなげ、複数テーブルをSelectして その結果に対して、SUM と Group By を使ってみた Select 商品CD, SUM(売上金額) AS 合計金額 From ( Select 商品CD, 売上金額 From T_2002年売上 UNION ALL Select 商品CD, 売上金額 From T_2003年売上 UNION ALL Select 商品CD, 売上金額 From T_2004年売上 ) Group By 商品CD This section describes when MySQL can use an index to satisfy an ORDER BY clause, the filesort operation used when an index cannot be used, and execution plan information available from the optimizer about ORDER BY.. An ORDER BY with and without LIMIT may return rows in different orders, as discussed in Section 8.2.1.17, “LIMIT Query Optimization”. The ORDER BY keyword sorts the records in ascending order by default.