Snowpark Migration Accelerator： Values

描述

在查询中创建可立即使用的临时表。有关更多信息，请参阅 Databricks SQL 语言参考 VALUES (https://docs.databricks.com/en/sql/language-manual/sql-ref-syntax-qry-select-values.html)。

您可使用 SELECT 语句的 FROM 子句中的 VALUES 子句定义一组固定值,以创建特定数量的行。（Snowflake SQL 语言参考 VALUES）

语法

VALUES {expression | ( expression [, ...] ) } [, ...] [table_alias]

SELECT expression [, ...] [table_alias]
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SELECT ...
FROM ( VALUES ( <expr> [ , <expr> [ , ... ] ] ) [ , ( ... ) ] ) [ [ AS ] <table_alias> [ ( <column_alias> [, ... ] ) ] ]
[ ... ]
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示例源模式

设置数据

Databricks

CREATE TEMPORARY VIEW number1(c) AS VALUES (3), (1), (2), (2), (3), (4);
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Snowflake

CREATE TEMPORARY TABLE number1(c int);
INSERT INTO number1 VALUES (3), (1), (2), (2), (3), (4);
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模式代码

Databricks

-- single row, without a table alias
> VALUES ("one", 1);
  one    1

-- Multiple rows, one column
> VALUES 1, 2, 3;
 1
 2
 3

-- three rows with a table alias
> SELECT data.a, b
    FROM VALUES ('one', 1),
                ('two', 2),
                ('three', NULL) AS data(a, b);
   one    1
   two    2
 three NULL

-- complex types with a table alias
> SELECT a, b
  FROM VALUES ('one', array(0, 1)),
              ('two', array(2, 3)) AS data(a, b);
 one [0, 1]
 two [2, 3]

-- Using the SELECT syntax
> SELECT 'one', 2
 one 2
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c

3

1

2

4

Snowflake

-- single row, without a table alias
SELECT * FROM (VALUES ('one', 1));

-- Multiple rows, one column
SELECT * FROM (VALUES (1), (2), (3));

-- three rows with a table alias
SELECT a, b
    FROM (VALUES ('one', 1),
                ('two', 2),
                ('three', NULL)) AS data(a, b);

-- complex types with a table alias
SELECT a, b 
    FROM 
    (VALUES ('one', '[0, 1]'), 
            ('two', '[2, 3]')
            ) AS data(a, b);

-- Using the SELECT syntax
SELECT 'one', 2
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c

3

1

2

4

已知问题

未发现任何问题

语言: 中文