Question : In Postgres 9.x, for a column of type UUID, how do I specify a UUID to be generated […]
Tag: default-value
Is DEFAULT NULL and ‘nullable value without default’ completely the same?
Question : ALTER TABLE test_table ADD COLUMN a DEFAULT NULL; vs. ALTER TABLE test_table ADD COLUMN a; Both columns will […]
PostgreSQL, what is the hostname address of my default database?
Question : I just created a PostgreSQL database on my laptop (following these instructions), which is running Linux CentOS 7. […]
Confused on how a value gets added with the DEFAULT constraint
Question : A recent definition I’ve read about Default Constraints: DEFAULT is specified for a column to assign a column […]
How do I an add a DEFAULT on a column if the table already exists?
Question : I want to add a DEFAULT for a timestamp column in PostgreSQL. With SQL Server you use ALTER […]
Performance: ALTER TABLE with default value vs. iterating over all records to set new value [closed]
Question : Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this […]
Missing right parenthesis after (or before) default 0, Oracle
Question : I am trying to create a table with Oracle SQL where two columns of the table should have […]
How to create column in DB with default value random string
Question : Can I create column in DB table (PostgreSQL) which have default value random string, and how ? If […]
Duplicate row with Primary Key in PostgreSQL
Question : Assume I have a table as follows named people, where id is a Primary Key: +———–+———+———+ | id […]
Foreign key default value
Question : I have a master table and another table with foreign key. I can easily add data to master […]