Blogs about: Foreign Key
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Most asked SQL queries in Software Testing Interview
Display the dept information from department table. select * from dept; Display the details of all employees. select * from emp; Display the name and job for all employees. select ename, job from… more →
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DB Constraints
wrote 2 weeks ago: First of all what is constraint: It is a property assigned to a column or the set of columns in a ta … more →
Relationships in Databases
wrote 2 weeks ago: Everything in databases are related to another item, so they are relational. The creator can link da … more →
Database updates
wrote 1 month ago: This week has been a busy one, but by no means unproductive. I am glad to say that everything works … more →
Banco de dados (Hands-On)
wrote 1 month ago: Tudo gira em torno da informação e sem armazenar e obter constantemente os dados, a informática iria … more →
Normalization หลักการและจุดประสงค์ ตอนที่ 1
wrote 1 month ago: ก่อนอื่นเลยเรามีดูกันก่อนว่าความหมายของการทำนอร์มัลไลเซชัน หรือที่หลายๆ คนเรียกันว่า นอร์มัลไลเนี่ยม … more →
Untrusted Foreign Keys
wrote 1 month ago: https://www.simple-talk.com/sql/database-administration/foreign-keys-and-their-states/ ALTER TABLE t … more →
Can we have multiple primary keys in a single table?
wrote 1 month ago: No we Cannot. For example, CREATE TABLE IF NOT EXISTS `usr` ( `id` int(11) NOT NULL, `survey_id` int … more →
Login with Email Address with Django 1.5
wrote 1 month ago: For at least a year we have known that Django 1.5 would contain functionality to significantly alter … more →
SQL Server - Delete vs Truncate
wrote 1 month ago: A common misconception about DELETE and TRUNCATE statements is that they do the same thing. This … more →
In MySQL, what are the differences between primary, foreign, and unique keys?
— 2 comments
wrote 2 months ago: The one thing that primary, unique, and foreign keys all have in common is the fact that each type o … more →
Create table in SQL
wrote 2 months ago: To create a table in Oracle a user will need to use the SQL language to achieve this. For example a … more →
Foreign Key
wrote 2 months ago: Constrainsts Constraint`lər məlumatları müəyyən qaydaya uyğun olaraq nizamlayan mexanizmdir. Constra … more →
Difference between Primary key and a Unique key? What is foreign key?
wrote 3 months ago: Both primary key and unique enforce uniqueness of the column on which they are defined. But by defau … more →
How to add Foreign Key in SQL Management Studio
wrote 3 months ago: In this post , I am going to show you , how to add a Foreign Key to a table from an another table in … more →
Cursor in SQL Server
wrote 4 months ago: Introduction: Hello guys, In the recent week i got an opportunity to work with cursors in sql serve … more →
Database Normalization and Normal Forms
wrote 4 months ago: Database Normalization: If you are doing database work from some time, you possibly have heard about … more →
Maintaining Data Integrity Easily With SQL Server Relationship Cascade Delete & Update Rule
wrote 4 months ago: Maintaining Data Integrity Easily With SQL Server Relationship Cascade Delete & Update Rule SQL … more →
Table Locks and Foreign Keys
wrote 5 months ago: Brief Description: After reading “Expert Indexing in Oracle Database 11g ” book, I decided to share … more →
Base de datos
wrote 6 months ago: Base de datos Descripción SQL Inserción y modificación de datos Estructura de las tablas Llaves prim … more →
