本文整理了Java中com.datastax.driver.core.querybuilder.Select.groupBy()方法的一些代码示例，展示了Select.groupBy()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Select.groupBy()方法的具体详情如下：
包路径：com.datastax.driver.core.querybuilder.Select
类名称：Select
方法名：groupBy

Select.groupBy介绍

[英]Adds a GROUP BY clause to this statement.

Note: support for GROUP BY clause is only available from Cassandra 3.10 onwards.
[中]将GROUP BY子句添加到此语句中。
注：对GROUP BY子句的支持仅在Cassandra 3.10之后提供。

代码示例

代码示例来源：origin: com.datastax.cassandra/cassandra-driver-core

/**
 * Adds a {@code GROUP BY} clause to this statement.
 *
 * <p>Note: support for {@code GROUP BY} clause is only available from Cassandra 3.10 onwards.
 *
 * @param columns the columns to group by.
 * @return the {@code SELECT} statement this {@code WHERE} clause is part of.
 * @throws IllegalStateException if a {@code GROUP BY} clause has already been provided.
 */
public Select groupBy(Object... columns) {
 return statement.groupBy(columns);
}

代码示例来源：origin: com.datastax.cassandra/cassandra-driver-core

assertThat(select().all().from("foo").groupBy("c1", column("c2"), raw("c3")).toString())
  .isEqualTo("SELECT * FROM foo GROUP BY c1,c2,c3;");
assertThat(
      .all()
      .from("foo")
      .groupBy("c1", column("c2"), raw("c3"))
      .orderBy(asc("c1"))
      .toString())
  .isEqualTo("SELECT * FROM foo WHERE x=42 GROUP BY c1,c2,c3 ORDER BY c1 ASC;");
try {
 select().all().from("foo").groupBy("foo").groupBy("bar");
 fail("Should not allow GROUP BY twice");
} catch (IllegalStateException e) {

代码示例来源：origin: com.datastax.cassandra/cassandra-driver-core

select("a", "b", "e", count("b"), max("e"))
          .from(table)
          .groupBy("a", "b")
          .limit(2)))
  .containsExactly(row(1, 2, 6, 2L, 12), row(1, 4, 12, 2L, 24));
        select("a", "b", "e", count("b"), max("e"))
          .from(table)
          .groupBy("a", "b")
          .perPartitionLimit(1)))
  .containsExactly(row(1, 2, 6, 2L, 12), row(2, 2, 6, 1L, 6), row(4, 8, 24, 1L, 24));
        select("a", "b", "e", count("b"), max("e"))
          .from(table)
          .groupBy("a", "b")
          .perPartitionLimit(1)
          .limit(2)))
assertThat(session().execute(select("a", count("a")).distinct().from(table).groupBy("a")))
  .containsExactly(row(1, 1L), row(2, 1L), row(4, 1L));
    session().execute(select("a", count("a")).distinct().from(table).groupBy("a").limit(2)))
  .containsExactly(row(1, 1L), row(2, 1L));
 session().execute(select().column("a").column("b").max("d").from(table).groupBy("a"));
 fail("Expecting IQE");
} catch (InvalidQueryException e) {
assertThat(session().execute(select("a", "b", max("d")).from(table).groupBy("a", "b")))

代码示例来源：origin: com.datastax.dse/dse-java-driver-core

assertThat(select().all().from("foo").groupBy("c1", column("c2"), raw("c3")).toString())
  .isEqualTo("SELECT * FROM foo GROUP BY c1,c2,c3;");
assertThat(
      .all()
      .from("foo")
      .groupBy("c1", column("c2"), raw("c3"))
      .orderBy(asc("c1"))
      .toString())
  .isEqualTo("SELECT * FROM foo WHERE x=42 GROUP BY c1,c2,c3 ORDER BY c1 ASC;");
try {
 select().all().from("foo").groupBy("foo").groupBy("bar");
 fail("Should not allow GROUP BY twice");
} catch (IllegalStateException e) {

代码示例来源：origin: com.datastax.dse/dse-java-driver-core

select("a", "b", "e", count("b"), max("e"))
          .from(table)
          .groupBy("a", "b")
          .limit(2)))
  .containsExactly(row(1, 2, 6, 2L, 12), row(1, 4, 12, 2L, 24));
        select("a", "b", "e", count("b"), max("e"))
          .from(table)
          .groupBy("a", "b")
          .perPartitionLimit(1)))
  .containsExactly(row(1, 2, 6, 2L, 12), row(2, 2, 6, 1L, 6), row(4, 8, 24, 1L, 24));
        select("a", "b", "e", count("b"), max("e"))
          .from(table)
          .groupBy("a", "b")
          .perPartitionLimit(1)
          .limit(2)))
assertThat(session().execute(select("a", count("a")).distinct().from(table).groupBy("a")))
  .containsExactly(row(1, 1L), row(2, 1L), row(4, 1L));
    session().execute(select("a", count("a")).distinct().from(table).groupBy("a").limit(2)))
  .containsExactly(row(1, 1L), row(2, 1L));
 session().execute(select().column("a").column("b").max("d").from(table).groupBy("a"));
 fail("Expecting IQE");
} catch (InvalidQueryException e) {
assertThat(session().execute(select("a", "b", max("d")).from(table).groupBy("a", "b")))