PostgreSQL – How to Rename a Sequence

ByAdmin September 5, 2023September 5, 2023

You can rename a sequence using the ALTER SEQUENCE statement with the RENAME TO clause in PostgreSQL database. Here’s the basic syntax for renaming a sequence:

ALTER SEQUENCE old_sequence_name RENAME TO new_sequence_name;

where old_sequence_name is the current name of the sequence you want to rename, and new_sequence_name is the new name you want to assign to the sequence.

Please note that when you rename a sequence, it does not impact the objects (such as tables) that use the sequence. You may need to update those objects manually to use the new sequence name if necessary.

Be cautious when renaming sequences, especially if they are used by other database objects, to avoid breaking dependencies in your database.

How-To Guides

PostgreSQL – How to Get DDL of a Materialized View

ByAdmin September 8, 2023September 8, 2023

To retrieve the Data Definition Language (DDL) for a materialized view in PostgreSQL, you can use the pg_get_viewdef function, which is a built-in function for getting the definition (DDL) of various database objects, including materialized views. Here’s the syntax to retrieve the DDL for a materialized view: SELECT pg_get_viewdef(‘your_materialized_view_name’::regclass, true); where your_materialized_view_name is the name…

How-To Guides

PostgreSQL – How to Rename a View

ByAdmin September 14, 2023September 14, 2023

You can rename a view using the ALTER VIEW statement with the RENAME TO clause in PostgreSQL database. Renaming a view can be useful when you want to change its name to something more meaningful or descriptive. Here’s the basic syntax for renaming a view: ALTER VIEW old_view_name RENAME TO new_view_name; where old_view_name is the…

How-To Guides

PostgreSQL – How to Drop a View

ByAdmin September 4, 2023September 4, 2023

To drop (delete) a view in PostgreSQL, you can use the DROP VIEW statement followed by the name of the view you want to remove. Here’s the basic syntax for dropping a view: DROP VIEW [IF EXISTS] view_name; where Here’s an example of how to drop a view in PostgreSQL: DROP VIEW IF EXISTS high_salary_employees;…

How-To Guides

PostgreSQL – Change Data Type of a Column

ByAdmin September 5, 2023September 5, 2023

To change the data type of a column in PostgreSQL, you can use the ALTER TABLE statement along with the ALTER COLUMN clause. Here are the steps to change the data type of a column: ALTER TABLE table_name ALTER COLUMN column_name TYPE new_data_type; where Here’s an example that changes the data type of a column…

How-To Guides

PostgreSQL – How to Change a User’s Password

ByAdmin September 5, 2023September 5, 2023

To change a user’s password in PostgreSQL, you can use the ALTER USER statement. Here’s how you can change a user’s password: Connect to PostgreSQL: You need to connect to your PostgreSQL server using a user account with superuser or administrative privileges, as only superusers can change the passwords of other users. Change the Password:To…

How-To Guides

PostgreSQL – How to Convert Date to String

ByAdmin September 20, 2023January 22, 2024

You can convert a date to a string using the TO_CHAR function in PostgreSQL database. TO_CHAR function allows you to format the date as a string with a specific format. Here’s how you can do it: SELECT TO_CHAR(your_date_column, ‘YYYY-MM-DD’) AS date_string FROM your_table; In the above syntax, The format string ‘YYYY-MM-DD’ specifies the desired format…

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