how to select data from multiple tables in sql server 2008

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1.11/5 (3 votes)

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SQL-Server-2008R2

i have 3 tables named as registration , lkg and ukg now i want total data from these tables.
i used the following query
select * from registration,lkg,ukg.
it displays out put but all those data displayed in 3 times
how can i retrieve this data
...........
thank you

Posted 7-Oct-14 1:12am

Member 11065510

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aarif moh shaikh · Answer 1 · 2014-10-10T02:59:00

Solution 3

Use Inner Join To Reduce Your Problem

Posted 10-Oct-14 2:59am

aarif moh shaikh

Thanks7872 · Answer 2 · 2014-10-07T01:27:00

Solution 1

See this recent answer and follow the link mentioned there : How to get data from two tables[^]

Posted 7-Oct-14 1:27am

Thanks7872

Kornfeld Eliyahu Peter · Answer 3 · 2014-10-07T01:30:00

Solution 2

The syntax you are using here is called 'implicit cross join' and that IS a cross join after all and for that it displays all combination of data can be produced from the tables you have. As you have 3 tables you see data 3 times...
You have to learn about SQL joins and how to use them...
http://en.wikipedia.org/wiki/Join_(SQL)[^]
Visual Representation of SQL Joins[^]

Posted 7-Oct-14 1:30am

Kornfeld Eliyahu Peter

Comments

Member 11065510 7-Oct-14 7:48am

my problem is these three tables contain same column names

Kornfeld Eliyahu Peter 7-Oct-14 7:50am

That is the good part! But sing fully qualified column names can get you over it!
MyTable1.Id, MyTabl2.Id and so on...