GROUP BY 和 COUNT關鍵字，關於這2個關鍵字的用法，網上有很多，這裡不再贅述。

-- 分組統計每天的總點選量
SELECT 
        DISTINCT to_char(TB.CRT_TIME, 'yyyy-MM-dd') DATE, COUNT(TB.BLOG_ID) SUM_OF_CLICK
FROM 
        TT_BLOG TB
WHERE 
        1 = 1  
        GROUP BY to_char(TB.CRT_TIME, 'yyyy-MM-dd')


-- 分組統計每天的總點選人數
SELECT 
        DISTINCT to_char(TB.CRT_TIME, 'yyyy-MM-dd') DATE, COUNT(DISTINCT TB.CRT_USER) SUM_OF_USER
FROM 
        TT_BLOG TB 
WHERE 
        1 = 1 
        GROUP BY to_char(TB.CRT_TIME, 'yyyy-MM-dd')