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I am implementing similar website like and i have two table one having tweet information and one having followers information and i want to show data from tweet where in tweet table userid=@userid as well as in Followers table userid=FollowTOid.
for example:
in tweet table user id=1 and in followers table i want to know that userid 1s following list so in follow table userid(1)=FollowToid.

bcoz in twitters news feed we can see our own tweets as well as following tweet

so please tell me how i can write query for it in sql.

It looks like you want to join the two tables together like the following

select t.* from TweetTable t left join FollowerTable F on t.userid = f.followTOid where t.userid = @userid

There are different types of joins and your old friend google, will have lots of information on this subject
Select * from Tweet where userid in (select FollowToId from Follow where userid =@userid)

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