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Cassandra数据库Java訪问
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a. 我们首先建立一个Schema:<pre name="code" class="java">ResultSet results = session.execute("SELECT * FROM simplex.playlists "); System.out.println(String.format("%-30s\t%-20s\t%-20s\n%s", "title", "album", "artist", "-------------------------------+-----------------------+--------------------")); for (Row row : results) { System.out.println(String.format("%-30s\t%-20s\t%-20s", row.getString("title"), row.getString("album"), row.getString("artist"))); } System.out.println();
session.execute("CREATE KEYSPACE simplex WITH replication " + "= {‘class‘:‘SimpleStrategy‘, ‘replication_factor‘:3};"); b.建立一个Table:
session.execute( "CREATE TABLE simplex.songs (" + "id uuid PRIMARY KEY," + "title text," + "album text," + "artist text," + "tags set<text>," + "data blob" + ");");c. 插入数据:
session.execute( "INSERT INTO simplex.songs (id, title, album, artist, tags) " + "VALUES (" + "756716f7-2e54-4715-9f00-91dcbea6cf50," + "‘La Petite Tonkinoise‘," + "‘Bye Bye Blackbird‘," + "‘Joséphine Baker‘," + "{‘jazz‘, ‘2013‘})" + ";");d. 查询数据:
ResultSet results = session.execute("SELECT * FROM simplex.playlists "); System.out.println(String.format("%-30s\t%-20s\t%-20s\n%s", "title", "album", "artist", "-------------------------------+-----------------------+--------------------")); for (Row row : results) { System.out.println(String.format("%-30s\t%-20s\t%-20s", row.getString("title"), row.getString("album"), row.getString("artist"))); } System.out.println();
Cassandra数据库Java訪问
标签:into str clu schema rom add 2.0 lex name
本文系统来源:http://www.cnblogs.com/lxjshuju/p/6837304.html
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