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我是 SQL 的初学者，我对 Teradata 的一个查询有疑问。当我运行它时，我得到这个错误：

“数据库中没有更多的假脱机空间”。

根据我在互联网上的研究，问题可能来自于我的查询不够优化，除了我不知道如何简化它。请你帮助我好吗？

查询错误来自哪里：

INSERT INTO DESTINATION_TABLE
(YEAR,
QUARTER,
LABEL,
NUMBER,
TIMESTAMP)
VALUES
((SELECT YEAR FROM DATE TABLE),
(SELECT QUARTER DATE TABLE),
'ANY LABEL',
(SELECT COUNT(*)
FROM DATE_TABLE AS TMP
FULL OUTER JOIN TABLE_1 AS T1 ON TMP.PRG_DT = T1.INN_DT
FULL OUTER JOIN TABLE_2 AS T2 ON TMP.PRG_DT = T2.INN_DT
INNER JOIN TABLE_3 AS T3 ON TMP.PRG_DT = T3.INN_DT),
CURRENT_TIMESTAMP);

查询应该做什么：

Year processed = year of DATE_TABLE
Quarter processed = quarter of DATE_TABLE
Label = ‘ANY LABEL’
Number = sum of the number of occurrences of TABLE_1 + number of occurrences of TABLE_2 + number of occurrences of TABLE_3 having for INN_DT the PRG_DT of DATE_TABLE
Timestamp = Current timestamp
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1 回答 1

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你不想要full join第三个组件！

相反，您似乎希望使用以下逻辑INSERT . . . SELECT：

INSERT INTO DESTINATION_TABLE (YEAR, QUARTER, LABEL, NUMBER, TIMESTAMP)
    SELECT YEAR, QUARTER, 'ANY LABEL',
           ( (SELECT COUNT(*)
              FROM table1 t1
              WHERE dt.PRG_DT = t1.INN_DT
             ) +
             (SELECT COUNT(*)
              FROM table2 t2
              WHERE dt.PRG_DT = t2.INN_DT
             )
           ),
           CURRENT_TIMESTAMP
    FROM DATE_TABLE dt;
于 2021-06-24T11:32:34.337 回答