Mysql selecting user friendes likes - mysql

Question

i have these tables
posts table
CREATE TABLE `users_posts` (
`pid` INT(11) NOT NULL AUTO_INCREMENT, /*post id*/
`uid` INT(11) NOT NULL, /*user who created the post, owner*/
`created_date` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
`updated_date` DATETIME NOT NULL,
`post_status` TINYINT(1) NOT NULL,
`content` TEXT NULL COLLATE 'utf8_general_ci',
PRIMARY KEY (`pid`),
)
connections table
CREATE TABLE `users_connections` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`user_1_uid` INT(11) NOT NULL, /*user id*/
`user_2_uid` INT(11) NOT NULL, /*friend user id of user id*/
`connections_status` TINYINT(4) NOT NULL,
PRIMARY KEY (`id`)
)
likes table
CREATE TABLE `post_ups` (
`upid` INT(11) NOT NULL AUTO_INCREMENT,
`uid` INT(11) NOT NULL, /*user id who like the post*/
`puid` INT(11) NOT NULL, /*post owner user id=users_posts.uid*/
`pid` INT(11) NOT NULL, /*post id=users_posts.pid*/
`up_status` TINYINT(1) NOT NULL,
PRIMARY KEY (`upid`),
INDEX `uid` (`uid`),
INDEX `up_status` (`up_status`),
INDEX `pid` (`pid`)
)
i need to select all posts and inside the query i need to check if some of my friend has like the post i'm currently selecting and if true , i can show this post on top of other post to show more relevant content
SELECT *,IF(CHECK IF FREIND LIKED THIS POST PUID == F_UID) FROM users_posts
is this possible ??

Answer 1

Query must like below:
SELECT up.*,
(SELECT count(*) FROM post_ups pups
WHERE up.pid=pups.pid AND up.uid <> pups.uid/*exclude own like*/
AND EXISTS (SELECT 0 FROM users_connections uc
WHERE uc.user_1_uid=up.uid/*pups.puid*/ AND uc.user_2_uid=pups.uid)) relevance
FROM users_posts up
ORDER BY relevance DESC;