如何显示数据块中的所有视图

Question

我用过

CREATE [OR REPLACE] [[GLOBAL] TEMPORARY] VIEW

创建一些视图。我想显示所有视图。

下面的命令不起作用。

  show views

但是当我使用

 show tables

结果包括视图。 我很困惑

Answer 1

此article有助于了解如何在Azure Databricks中使用“视图”。

示例：

-- Create a persistent view view_deptDetails in database1. The view definition is recorded in the underlying metastore
CREATE VIEW database1.view_deptDetails
    AS SELECT * FROM company JOIN dept ON company.dept_id = dept.id;

-- Create or replace a local temporary view from a persistent view with an extra filter
CREATE OR REPLACE TEMPORARY VIEW temp_DeptSFO
    AS SELECT * FROM database1.view_deptDetails WHERE loc = 'SFO';

-- Access the base tables through the temporary view
SELECT * FROM temp_DeptSFO;

-- Create a global temp view to share the data through different sessions
CREATE GLOBAL TEMP VIEW global_DeptSJC
    AS SELECT * FROM database1.view_deptDetails WHERE loc = 'SJC';

-- Access the global temp views
SELECT * FROM global_temp.global_DeptSJC;

-- Drop the global temp view, temp view, and persistent view.
DROP VIEW global_temp.global_DeptSJC;
DROP VIEW temp_DeptSFO;
DROP VIEW database1.view_deptDetails;

此article有助于了解如何在Azure Databricks中使用“显示表​​”。

示例：

SHOW TABLES [{FROM|IN} db_name] [LIKE 'pattern']

希望这会有所帮助。

Answer 2

• SHOW VIEWS;
• SHOW VIEWS FROM DATABASE;
• SHOW VIEWS IN DATABASE;

这些所有查询都适用于 Databricks-DeltaLake 集群，不适用于 Databaricks 集群。