How to apply a join query in asp.net using vb

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I am having two tables i.e a parent table & a child table such as

Category table with fields -> catid,category_name

& The other table is item -> itemid,catid,itemname,details,price.

What I need to do i bind a gridview on the items page where I need to display few details such as categoryname,itemname,details & price.

So what help I need is how to query, so that I get the category name from the category table through the catid stored in item table.

Tables is like

Category

Catid category_name
1 mouse
2 keyboard
3 mobile

Item

itemid catid itemname details price
1 1 logitech mouse 500
2 3 mobile mobile 5000

when in the gridview of the items page I want category name instead of that catid.

Please help.

Posted 23-Apr-14 0:44am

onlybigb321

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Comments

Er Daljeet Singh 23-Apr-14 6:47am

you need to use sql join for that

onlybigb321 23-Apr-14 6:53am

That I know, but how.
Can you suggest me the query?

3 solutions

Solution 3

Try something like this for inner join if you want to show all the data from both the table.

SQL

SELECT table1.*,table2.* From table1 inner join table2 on table1.Column = table2.column where table1.column = '1'

Posted 23-Apr-14 0:57am

ravikhoda

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OriginalGriff · Accepted Answer · 2014-04-23T00:54:00

Solution 1

Try:

SQL

SELECT it.itemId, it.catid, it.itemName, ct.Category_name, it.Price
FROM ItemTable it
JOIN CetegoryTable ct
ON it.Catid=ct.catid

Posted 23-Apr-14 0:54am

OriginalGriff

Sunasara Imdadhusen · Accepted Answer · 2014-04-23T00:55:00

Solution 2

Hello,

Following are the SQL query for getting complete result as you want:

SQL

SELECT C.Catid, C.category_name, I.itemid, I.itemname, I.details, I.price FROM Category C INNER JOIN Item I ON C.Catid == I.Catid

Thanks,

Posted 23-Apr-14 0:55am

Sunasara Imdadhusen