I am using Postgres. I would like to change column type in all tables where column name is "description" from varchar(255) to text. If anyone knows that I would be very glad for your help.
I am trying to run an alter query on a table, and its giving me a Lost connection to MySQL server during query MySQL server has gone away. The query that I am running is alter table table_name ...
I need to change a datatype from INT to BIGINT in a 600GB MySQL table. The column has a unique index. I might be good with unsigned INT, but I assume changing to that or BIGINT will be pretty much ...
I want to make an ALTER TABLE expression which adds a new column and sets a default value and additionaly defines the allowed values for that column. It's a text column, and allowed should be only ...
How do most "popular" (MySQL, Postgres...) database system handle altering tables on live production databases (like adding, deleting or changing the type of colums)? I know the correct way is to ...
Edit: It was a default constraint as a result of setting a default value when adding the column. The name gave it away when starting with 'DF__'. Anyway, solved it by adding the column and manually ...
I am using PostgreSQL database. I have a table with millions of rows. I have a varchar column with 2000 size and i want to make it to 4000. I ran the alter table command, but it is taking too much ...
I have a table in PostgreSQL where one column "vat" has type money but I would like to alter it to decimal instead. How can I do it? I tried with: alter table my_table alter column vat type ...