NettetSay I have a table that is has a primary key like: product -id -modified_at There are other tables that have the product_id as a foreign key: inventory -id -product_id options -id -product_id I want to update the product.modified_at column every time there is an update to any of the other tables inventory and options. Can I use a trigger to do ... Nettet11. feb. 2024 · How to Create Primary Key in SQL Server We can Create a Primary Key in 2 ways: 1. SQL Server Management Studio 2. T-SQL: Create Primary while …
Create Primary Keys in SQL Server - SQL Server Microsoft Learn
Nettet14. jan. 2024 · Here’s how: First, open the PostgreSQL shell by typing psql at the command prompt, or opening your database in Beekeeper Studio. Once you’re … NettetSQL : How to add an integral primary key to a table created with SELECT INTOTo Access My Live Chat Page, On Google, Search for "hows tech developer connect"S... janelle mackinnon occupational therapist
sql - How to add a foreign key when creating a table to a table …
NettetIf you want to add a new column say deptId to the existing table say department then you can do it using the below code. ALTER TABLE department ADD COLUMN deptID INT; … Nettet12. apr. 2024 · 2 Answers Sorted by: 1 Either create the second table first. Or use alter table. That is, create the first table without the reference and then do: alter table table1 add constraint fk_table1_team foreign key (team_id) REFERENCES table2 (team_id); The declaration for table1 would be: Nettet12. apr. 2024 · SQL : How to create a Postgres table with unique combined primary key? Delphi 29.7K subscribers Subscribe 0 Share No views 1 minute ago SQL : How to create a Postgres … janelle lacey and richard dreyfuss