how to merge multiple rows into one row in sql

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Hi all ,

i have records like this.

ID TYPE

1 0
1 1
1 2
2 1
2 2

now i would like to have a query which gives me out put like this .

ID Type1 TYPE2 TYPE3

1 TRUE TRUE TRUE
2 FALSE TRUE TRUE

i tried some group by kind of things but not applied as my table have multiple joins and some where conditions as well so i can not put the whole code. above is just the basic thing which i want to do.

Posted 8-Dec-14 2:07am

ravikhoda

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Tomas Takac · Accepted Answer · 2014-12-08T02:22:00

Solution 1

Use PIVOT[^] like this:

SQL

SELECT id, [0], [1], [2]
FROM (SELECT id, [type] FROM mytable) AS src
PIVOT (COUNT([type]) FOR [type] IN ([0],[1],[2])) AS pvt

You can optionally rename the columns or replace 0/1 with TRUE/FALSE.

Posted 8-Dec-14 2:22am

Tomas Takac