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Primary Key.

Q153. Define Primary Key.

Ans. Primary Key is set of one or more attributes that can uniquely identify tuples within a relation.

Difference between Primary Key Foreign Key

Main Difference

The principle contrast between primary key and the foreign key is that the primary key is a segment or an arrangement of segments that can be utilized to interestingly recognize a line in a table while the foreign key is a segment or an arrangement of sections that allude to a primary key or a hopeful key of another table. 940 more words


Titik Balik

Well, UTS semester 3 sudah berlalu. Semoga hasilnya memuaskan ya, hihi.

Challenge berikutnya adalah menghadapi UAS. Persiapan ini ya bisa dengan memperkaya pemahaman materi, ketahanan fisik, dan yang paling penting adalah kedekatan kita dengan yang Maha pemilik ilmu, Alloh SWT. 418 more words

Primary Key

How to Quickly Rename all Primary Keys in Oracle

Are you working with someone else’s schema and they haven’t declared nice names for all their constraints?

Unfortunately, it is all too easy to create a table like this: 529 more words


SQL Server - Transact SQL - Specify Fill Factor when creating primary key


Fill Factor is an important component to think of when creating an index.

It is pretty well known how to use the with clause to specify Fill Factor, targeted groups when creating an Index. 229 more words


SQL Server -Dump Info on Keys

Here’s a short stored procedure that could be useful when trying to understand a SQL Server database.

Let’s say that you have a simple schema like the one below.¬† 471 more words

SQL Server

Primary Key

In this blog, we’ll discuss about ¬†Primary key.

  1. Primary key is one of the most commonly in use constraint in MS SQL.
  2. Only 1 Primary key can be defined in a table.
  3. 1,099 more words
Constraints In SQL