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UNIQUE | PRIMARY KEY

Description

Specifies that the column can contain only unique values. In Snowflake, both UNIQUE and PRIMARY KEY are used to document and structure data, but they do not have active data validation functionality in the sense that you might expect in other database systems that enforce these restrictions at the storage level.

Click here to navigate to the Amazon Redshift docs page for this syntax.

In Snowflake, unique, primary and foreign keys are used for documentation and do not enforce constraints or uniqueness. They help describe table relationships but don't impact data integrity or performance.

Grammar Syntax

UNIQUE | PRIMARY KEY

Sample Source Patterns

Input Code:

IN -> Redshift_01.sql
CREATE TABLE table1 (
    col1 INTEGER PRIMARY KEY,
    col2 INTEGER UNIQUE
);

Output Code:

OUT -> Redshift_01.sql
CREATE TABLE table1 (
    col1 INTEGER PRIMARY KEY,
    col2 INTEGER UNIQUE
)
COMMENT = '{ "origin": "sf_sc", "name": "snowconvert", "version": {  "major": 0,  "minor": 0,  "patch": "0" }, "attributes": {  "component": "redshift",  "convertedOn": "09/17/2024" }}'
;

Related EWIs

There are no known issues.

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