Tags » Primary Key

Difference Between Primary Key and Unique Key

PRIMARY KEY UNIQUE KEY NULL It doesn’t allow Null values.
Because of this we refer 309 more words
Sql Server

Primary Key Script

The below script generates primary key across all the tables in the database.

;with CTE as (select distinct COLUMN_NAME,ORDINAL_POSITION,TABLE_NAME,b.name,c.index_id,
b. as ObjectID,b.parent_object_id as
from INFORMATION_SCHEMA.KEY_COLUMN_USAGE A Inner Join sys.key_constraints B on…
197 more words

General

Basis data

Praktikum minggu 8 gue belajar mengenai basis data. Basis data terdiri dari field-field (tabel) yang berisi atribut (isi tabel) dan memiliki primary key (kode unik yang berbeda sama sekali antar tabel) serta foreign key (primary key yang ada pada tabel induk menjadi isi dari tabel anak). 638 more words

Tugas Penkom

partition key, composite key and clustering key in Cassandra

There is a lot of confusion around this, I will try to make it as simple as possible.

The primary key is a general concept to indicate one or more columns used to retrieve data from a Table. 560 more words

Java

Pinang

Assalamu’alaykum semua (:

Sudah lama tidak menulis lagi di white board ini.
Banyak yang ingin kuceritakan di sini, semoga bermanfaat bagi saya pribadi dan kamu. Kamu, iya kamu, readers yang semoga dirahmati Alloh (: 585 more words

Primary Key

SQL: Alter script to change the Primarykey Column datatype

–This will drop the primary key constraint
ALTER TABLE DROP CONSTRAINT PK_TARGET_TYPE

–Alter datatype
ALTER TABLE ALTER COLUMN INT NOT NULL

–Add Primary key constraint… 21 more words

Sql Server