SQL HAVING Clause

Submitted by admin on

The HAVING Clause is always used after the GROUP BY clause, it can not come without the GROUP BY clause. It works the same as the WHERE Clause, it is therefore also used to apply conditions on the aggregate_functions which was impossible by using simple WHERE clause.

The HAVING clause simply contains the conditions to filter data just like in WHERE clause.

SQL HAVING Syntax

Hotel Reservation System in MS Access

Submitted by itachi_philip on
This System is created based on the Hotel Reservation System of Mr. Jomar Pabuaya a.k.a Admin here in Sourcecodester... by the way... I uploaded there the application with the undone source code, its because you are demanding it to upload the code and eager to see the source code..then you can download it now...and its also due to the request of the ADMIN itself... and if you want to improve it

Online Enrollment And Grading System using MVC 3 (Razor)

Submitted by tony_fear2003@… on
This Tonyfear's Online Enrollment System using ASP.Net's MVC3 technology (Razor) The purpose of this project is for those who wish 1.) to know web application development 2.) to know the MVC architecture 3.) to know how to use the ORM frameworks like nHibernate or Entity Framework 4.) to know how to implement custom membership service for LOGIN 5.) how to implement webgrid 6.) how to implement

SQL PRIMARY KEY Constraint

Submitted by admin on

Every table must be identified with a unique key or the Primary Key. Primary Key uniquely identifies each record in the table. It makes searching of record faster.
A Primary Key cannot contain a NULL values and must be unique in every record.

Different DBMS have different implementations to set the primary keys, so let’s see each of them below.

SQL PRIMARY KEY Syntax

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