Is prefixing each field name in a table with abbreviated table name a good practice?

Question

Do you prefix each field in a table with abbreviated table name?

Example:

Table: User

Fields:
user_id
user_name
user_password

Or d

Answer 1

It's ok to name fields that way(minimally), but for primary key and captions/name. If you consistently name all your primary key as ID, and name as Name, constructing query will degenerate into superfluous aliases:

select i.id as invoice_id

v.id as vendor_id, p.id as product_id, 
v.name as vendor, p.name as product, b.name as branch, c.name as parcel,

i.total_amount,
i.discount,
i.invoice_date

from invoice i
join product p on i.product_id = p.id
join vendor v on i.vendor_id = v.id
join branch b on i.branch_id = b.id
join parcel c on i.parcel_id = c.id

As joining tables and displaying the entity's caption/name is the norm rather than exception, I name my primary key in full form, and for caption/name field, the same name as table name.

create table product
(
product_id uuid not null, -- primary key
product text not null,
bar_code text not null default '',
rfid_code text  not null default '',
current_qty int default 0
);

create table vendor
(
vendor_id uuid not null, -- primary key
vendor text not null,
is_active boolean not null default true
);

create table branch
(
branch_id uuid not null, -- primary key
branch text not null,
sub_branch_of_id uuid,
current_sales money not null default 0,        
);

create table user
(
user_id uuid not null, -- primary key
user text not null,
password text not null default ''
);

So your query won't have superfluous aliases:

select i.invoice_id, p.product_id, v.vendor, p.product, b.branch, c.parcel,

i.total_amount,
i.discount,
i.invoice_date

from invoice i
join product p on o.product_code = p.product_code
join vendor v on o.vendor_code = v.vendor_code
join branch b on o.branch_code = b.branch_code
join parcel c on o.parcel_code = c.parcel_code