Translate match operator

reference/operators/like.md

@@ -5,11 +5,11 @@ layout: en
 
 # `LIKE` operator
 
-PGroonga converts `column LIKE '%KEYWORD%'` condition to `column @@ 'KEYWORD'` internally. [`@@` operator](match.html) does full text search with index. It's fast rather than `LIKE` operator without index.
+PGroonga converts `column LIKE '%KEYWORD%'` condition to `column %% 'KEYWORD'` internally. [`%%` operator](match.html) does full text search with index. It's fast rather than `LIKE` operator without index.
 
-Both beginning `%` and ending `%` are important. `'KEYWORD%'`, `'%KEYWORD'` and so on aren't converted to `column @@ 'KEYWORD'`. PGroonga returns no records for these patterns. Because PGroonga can't search these patterns with index.
+Both beginning `%` and ending `%` are important. `'KEYWORD%'`, `'%KEYWORD'` and so on aren't converted to `column %% 'KEYWORD'`. PGroonga returns no records for these patterns. Because PGroonga can't search these patterns with index.
 
-The original `LIKE` operator searches against text as is. But `@@` operator does full text search against normalized text. It means that search result of `LIKE` operator with index and search result of the original `LIKE` operator may be different.
+The original `LIKE` operator searches against text as is. But `%%` operator does full text search against normalized text. It means that search result of `LIKE` operator with index and search result of the original `LIKE` operator may be different.
 
 For example, the original `LIKE` operator searches with case sensitive. But `LIKE` operator with index searches with case insensitive.
 

reference/operators/match.md

@@ -1,8 +1,18 @@
 ---
-title: "@@ operator"
+title: "%% operator"
 layout: en
 ---
 
-# `@@` operator
+# `%%` operator
 
-TODO
+You can do full text search with one keyword by `%%` operator:
+
+```sql
+SELECT * FROM memos WHERE content %% '全文検索';
+--  id |                      content
+-- ----+---------------------------------------------------
+--   2 | Groongaは日本語対応の高速な全文検索エンジンです。
+-- (1 行)
+```
+
+If you want to do full text search with multiple keywords or AND/OR search, use [`%%` operator](query.html).

reference/operators/query.md

@@ -1,11 +1,25 @@
 ---
-title: "%% operator"
+title: "@@ operator"
 layout: en
 ---
 
-# `%%` operator
+# `@@` operator
 
-TODO
+`キーワード1 OR キーワード2`のようにクエリー構文を使って全文検索をする
+ときは`@@`演算子を使います。
+
+```sql
+SELECT * FROM memos WHERE content @@ 'PGroonga OR PostgreSQL';
+--  id |                                  content
+-- ----+---------------------------------------------------------------------------
+--   3 | PGroongaはインデックスとしてGroongaを使うためのPostgreSQLの拡張機能です。
+--   1 | PostgreSQLはリレーショナル・データベース管理システムです。
+-- (2 行)
+```
+
+クエリー構文の詳細は
+[Groognaのドキュメント](http://groonga.org/ja/docs/reference/grn_expr/query_syntax.html)
+を参照してください。
 
 ただし、`カラム名:@キーワード`というように「`カラム名:`」から始まる構
 文は無効にしてあります。そのため、前方一致検索をしたい場合は「`カラム