What is Undrop in Snowflake?
Restores the most recent version of a dropped table. CREATE TABLE , ALTER TABLE , DROP TABLE , SHOW TABLES , DESCRIBE TABLE.
How do you Undrop a table in SQL?
You can recover a dropped table by doing the following:
- Identify the dropped table by invoking the LIST HISTORY DROPPED TABLE command.
- Restore a database- or table space-level backup image taken before the table was dropped.
- Create an export directory to which files containing the table data are to be written.
How do you Undrop a snowflake?
With the UNDROP feature in Snowflake you can recover that lost data instantaneously with a single command:
- UNDROP TABLE
- UNDROP SCHEMA
- UNDROP DATABASE
How do you roll back a dropped table in a snowflake?
How to restore the dropped table in Snowflake
- Step 1: Log in to the account. We need to log in to the snowflake account.
- Step 2: Create Database in Snowflake.
- Step 3: Select Database.
- Step 4: Create a table in Snowflake using Create Statement.
- Step 5: Remove or Drop Table.
- Step 5: Restore the Dropped Table.
Can we Undrop database in Snowflake?
UNDROP relies on the Snowflake Time Travel feature. An object can be restored only if the object was deleted within the Data Retention Period. The default value is 24 hours.
What is time travel in Snowflake?
Snowflake Time Travel allows you to access Historical Data (that is, data that has been updated or removed) at any point in time. It is an effective tool for doing the following tasks: Restoring Data-Related Objects (Tables, Schemas, and Databases) that may have been removed by accident or on purpose.
What is data Time Travel?
Using Time Travel, you can perform the following actions within a defined period of time: Query data in the past that has since been updated or deleted. Create clones of entire tables, schemas, and databases at or before specific points in the past. Restore tables, schemas, and databases that have been dropped.
Can we create stored procedure in Snowflake?
Stored procedures and user-defined functions can have the same names if they have different numbers of arguments or different data types for arguments. However, Snowflake does not allow creating stored procedures with the same name as any of the system-defined functions.
Can you drop public schema snowflake?
Dropping public schema is not a good choice. That’s the behaviors of snowflake to create table in the public schema to when user haven’t specified the schema. So do a role based access control if you don’t wanted to use public schema.
What is cluster key in Snowflake?
A clustering key is a subset of columns in a table (or expressions on a table) that are explicitly designated to co-locate the data in the table in the same micro-partitions.
What is transient table in Snowflake?
Snowflake Transient Tables are comparable to Permanent Tables, except that they don’t have a fail-safe period. As a result, Transient Tables are meant for temporary data that must be kept after each session but do not require the same level of data protection and recovery as Permanent Tables.
What is materialized view database?
In computing, a materialized view is a database object that contains the results of a query. For example, it may be a local copy of data located remotely, or may be a subset of the rows and/or columns of a table or join result, or may be a summary using an aggregate function.
Can Time Travel is possible?
Time travel to the past is theoretically possible in certain general relativity spacetime geometries that permit traveling faster than the speed of light, such as cosmic strings, traversable wormholes, and Alcubierre drives.
What SQL is used in Snowflake?
Snowflake is a data platform and data warehouse that supports the most common standardized version of SQL: ANSI. This means that all of the most common operations are usable within Snowflake.