How do you flatten a JSON in a snowflake?

How does flatten work in Snowflake?

Flattens (explodes) compound values into multiple rows. FLATTEN is a table function that takes a VARIANT, OBJECT, or ARRAY column and produces a lateral view (i.e. an inline view that contains correlation referring to other tables that precede it in the FROM clause).

What does lateral flatten do in Snowflake?

Snowflake LATERAL with FLATTEN Table Function. The FLATTEN function is a table function which takes an object or array object and explodes the values into rows. The flatten function produces a lateral view. Flatten function is most commonly used in converting array values to table rows.

How do I read a JSON file in a snowflake?

Loading JSON file into Snowflake table. Loading a JSON data file to the Snowflake Database table is a two-step process. First, using PUT command upload the data file to Snowflake Internal stage. Second, using COPY INTO , load the file from the internal stage to the Snowflake table.

What is coalesce in Snowflake?

Returns the first non-NULL expression among its arguments, or NULL if all its arguments are NULL.

What is Snowflake join?

A JOIN operation combines rows from two tables (or other table-like sources, such as views or table functions) to create a new combined row that can be used in the query. The JOIN subclause specifies (explicitly or implicitly) how to relate rows in one table to the corresponding rows in the other table. …

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How do you transpose columns to rows in a snowflake?

Rotates a table by transforming columns into rows. UNPIVOT is a relational operator that accepts two columns (from a table or subquery), along with a list of columns, and generates a row for each column specified in the list. In a query, it is specified in the FROM clause after the table name or subquery.

How do you flatten an array in SQL?

To convert an ARRAY into a set of rows, also known as “flattening,” use the UNNEST operator. UNNEST takes an ARRAY and returns a table with a single row for each element in the ARRAY . Because UNNEST destroys the order of the ARRAY elements, you may wish to restore order to the table.

How does lateral flatten work?

You can use a LATERAL JOIN and a FLATTEN function to separate events into individual JSON objects while preserving the global data. FLATTEN returns a row for each object, and the LATERAL modifier joins the data with any information outside of the object — in this example, the device type and version.

What is flatten Google Sheets?

Flattens all the values from one or more ranges into a single column.

What is flatten the data?

Data flattening usually refers to the act of flattening semi-structured data, such as name-value pairs in JSON, into separate columns where the name becomes the column name that holds the values in the rows. Data unflattening is the opposite; adding nested structure to relational data.