Cross Join in SQL-Server

Cross Joins produce results that consist of every combination of rows from two or more tables. That means if table A has n rows and table B has m rows, a CROSS JOIN will result in n X m rows.

There is no Where Condition used in cross join

SQL CROSS JOIN syntax:

SELECT * FROM [TABLE 1] CROSS JOIN [TABLE 2]

SELECT * FROM [TABLE 1], [TABLE 2]

Example

CREATE TABLE [dbo].[Student]

(

[StudID] [int] IDENTITY(1,1) NOT NULL,

[StudName] [varchar](50)

)

CREATE TABLE [dbo].[Division]

(

[DivisionID] [int] IDENTITY(1,1) NOT NULL,

[DivisionName] [varchar](50)

)

INSERT INTO Student(StudName) VALUES('ABC')

INSERT INTO Student(StudName) VALUES('XYZ')

INSERT INTO Division(DivisionName) VALUES('Division 1')

INSERT INTO Division(DivisionName) VALUES('Division 2')

INSERT INTO Division(DivisionName) VALUES('Division 3')

SELECT * FROM Student

CROSS JOIN Division

OUTPUT

We have two table Student and Division corresponding 2 and 3 rows in table cross join return

2 X 3 = 6 Rows

Comments

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