PG数据库获取最近四个小时 使用产品的用户审计信息

SELECT
    审计表.COUNT,
    gspuser.code 
FROM
    gspuser
    JOIN (
    SELECT
        gspaudit1912.userid,
        COUNT ( 1 ) 
    FROM
        gspaudit1912 
    WHERE
        datetime > ( SELECT now() - INTERVAL '4 hour' ) 
    GROUP BY
        userid 
    ORDER BY
        2 DESC 
    ) 审计表 ON 审计表.userid = gspuser.ID 
ORDER BY
    1 DESC