How-To Guides – Page 3

How to export data from Redshift database to a csv file

Use the ‘unload‘ command as shown below to extract data from Redshift database to a csv file. unload (‘SELECT *

Once the table in created – Redshift does not support altering column to remove a not-null constraint defined on a

You might encounter the below error while trying to drop a table from Amazon Redshift database. Error : [Amazon](500310) Invalid

You might encounter the below message while creating a stored procedure in Amazon Redshift database. Error : [Amazon](500310) Invalid operation:

You might encounter the below error while accessing a database object in Redshift database. Error : [Amazon](500310) Invalid operation: permission

Manually Refresh: Below is the syntax to manually refresh a materialized view where mv_name is the name of the materialized

Identify the constraint that you would like to drop using below sql and copy the constraint name. select * from

Use the below command to modify the column width in Redshift. ALTER TABLE table_name ALTER COLUMN column_name TYPE new_data_type; Example,

You can define a column to not accept null values and provide a default value for the column while creating

To modify the existing sort key of a table: ALTER TABLE tablename ALTER SORTKEY (columnname); or ALTER TABLE tablename ALTER