Skip to main content

Types Of Join In SQL

Sql joins are used to fetch/retrieve data from two or more data tables, based on a join condition. A join condition is a relationship among some columns in the data tables that take part in Sql join. Basically data tables are related to each other with keys. We use these keys relationship in sql joins.

Inner Join
Outer Join
Cross Join


Join
Cross Join
Cross join


Comments

Post a Comment

Popular posts from this blog

Create Strong Name Assembly

From a VS.NET command prompt, enter the following: 1. Generate a KeyFile sn -k keyPair.snk 2. Get the MSIL for the assembly ildasm SomeAssembly.dll /out:SomeAssembly.il 3. Rename the original assembly, just in case ren SomeAssembly.dll SomeAssembly.dll.orig 4. Build a new assembly from the MSIL output and your KeyFile ilasm SomeAssembly.il /dll /key= keyPair.snk   more read visit : http://www.geekzilla.co.uk/ViewCE64BEF3-51A6-4F1C-90C9-6A76B015C9FB.htm
2 comments
Read more

Remove Duplicate Row in Sql Query

Method 1: -- Create Sample Table DECLARE @ table TABLE ( data VARCHAR ( 20 ) ) -- Insert Some Data INSERT INTO @ table VALUES ( 'not duplicate row' ) INSERT INTO @ table VALUES ( 'duplicate row' ) INSERT INTO @ table VALUES ( 'duplicate row' ) -- Find out Duplicate rows in table : SELECT   data , COUNT ( data ) nr FROM     @ table GROUP BY data HAVING   COUNT ( data ) > 1 -- Remove Duplicate rows from table SET NOCOUNT ON SET ROWCOUNT 1 WHILE 1 = 1    BEGIN       DELETE    FROM @ table       WHERE     data IN ( SELECT   data                                FROM     @ table            ...
Post a Comment
Read more