Vitsliputsli

function university_files() {
    wp_enqueue_scripts(...);
    ...
}
add_action('wp_enqueue_scripts', 'university_files');

SELECT 
        * 
    FROM workers 
    WHERE id>=2 AND id<=6
    ORDER BY age

WITH recursive hours (n) AS (
    SELECT (@q:=0) n FROM dual
    UNION ALL
    SELECT (@q:=@q+1) n FROM hours WHERE @q<24
)
SELECT hours.n, ваш_запрос.* FROM ваш_запрос
    RIGHT JOIN hours ON ваш_запрос.час = hours.n

WITH recursive hours (n) AS (
    SELECT CONCAT("0",CAST(@q:=0 as varchar(1))) n FROM dual
    UNION ALL
    SELECT LPAD(CAST(@q:=@q+1 as varchar(2)),2,"0") n FROM hours WHERE @q<24
)
SELECT hours.n, ваш_запрос.* FROM ваш_запрос
    RIGHT JOIN hours ON  ваш_запрос.час = hours.n

WITH discussion_count AS (
    SELECT count(*) cnt FROM discussion WHERE author_id=?
),
discussion_messages_count AS (
    SELECT count(*) cnt FROM discussion_messages WHERE author_id=?
)
SELECT 
        p.name, dc.cnt discussions, dmc.cnt dcount
    FROM people p, discussion_count dc, discussion_messages_count dmc
    WHERE p.id=?

SELECT
        table1.*
    FROM table1
    LEFT JOIN table2 ON table1.searchArticle=table2.searchArticle AND table1.brand=table2.brand
    WHERE table2.brand is null // здесь лучше указать table2.id