Question

尝试在hive中执行以下查询。抛出异常无法识别＆＃39; SELECT＆＃39; ＆＃39; DISTINCT＆＃39; ＆＃39;（＆＃39;在表达规范中。感谢任何帮助。

SELECT DISTINCT (FISCAL_QUARTER_START_DATE)
      FROM TEST_STAGE.TEST_TABLE
     WHERE     FISCAL_YEAR_ID =
                  (SELECT FISCAL_YEAR_ID
                     FROM TEST_STAGE.TEST_TABLE
                    WHERE CALENDAR_DATE = FROM_UNIXTIME (UNIX_TIMESTAMP ()))
           AND SUBSTR (FISCAL_QUARTER_NAME, 0, 2) =
                  (SELECT SUBSTR (FISCAL_QUARTER_NAME, 0, 2)
                     FROM TEST_STAGE.TEST_TABLE
                    WHERE CALENDAR_DATE = FROM_UNIXTIME (UNIX_TIMESTAMP ()))

由于

Answer 1

使用适当的表别名和IN子句代替=进行子查询。

SELECT DISTINCT (t1.FISCAL_QUARTER_START_DATE)
FROM TEST_STAGE.TEST_TABLE t1
WHERE t1.FISCAL_YEAR_ID IN (
        SELECT t2.FISCAL_YEAR_ID
        FROM TEST_STAGE.TEST_TABLE t2
        WHERE t2.CALENDAR_DATE = FROM_UNIXTIME(UNIX_TIMESTAMP())
        )
    AND SUBSTR(t1.FISCAL_QUARTER_NAME, 0, 2) IN (
        SELECT SUBSTR(t3.FISCAL_QUARTER_NAME, 0, 2)
        FROM TEST_STAGE.TEST_TABLE t3
        WHERE t3.CALENDAR_DATE = FROM_UNIXTIME(UNIX_TIMESTAMP())
        );

我认为您的查询是等效的，可以使用EXISTS转换为单个子查询。

SELECT DISTINCT t1.FISCAL_QUARTER_START_DATE
FROM TEST_STAGE.TEST_TABLE t1
WHERE EXISTS (
        SELECT 1
        FROM TEST_STAGE.TEST_TABLE t2
        WHERE SUBSTR(t1.FISCAL_QUARTER_NAME, 0, 2) = SUBSTR(t2.FISCAL_QUARTER_NAME, 0, 2)
            AND t1.FISCAL_YEAR_ID = t2.FISCAL_YEAR_ID
            AND t1.CALENDAR_DATE = FROM_UNIXTIME(UNIX_TIMESTAMP())
        );

无法识别＆＃39; SELECT＆＃39;附近的输入＆＃39; DISTINCT＆＃39; ＆＃39;（＆＃39;在表达式规范中--Hive

1 个答案: