每季度檢查一次sql

Question

如何在sql db2中檢查特定月份在特定月份中的特定季度。 像月1-4季度1喜歡比我想查個月-1是否是在今年的季度

Answer 1

試試這個

SELECT 
    MyDate, 
    CASE 
     WHEN MONTH(MyDate) BETWEEN 1 AND 3 THEN convert(char(4), YEAR(MyDate) - 1) + 'Q3' 
     WHEN MONTH(MyDate) BETWEEN 4 AND 6 THEN convert(char(4), YEAR(MyDate) - 1) + 'Q4' 
     WHEN MONTH(MyDate) BETWEEN 7 AND 9 THEN convert(char(4), YEAR(MyDate) - 0) + 'Q1' 
     WHEN MONTH(MyDate) BETWEEN 10 AND 12 THEN convert(char(4), YEAR(MyDate) - 0) + 'Q2' 
    END AS Quarter 
FROM 
    MyTable 
order by Quarter 

OR

SELECT 
    date 
    , CASE 
     WHEN MONTH(date) BETWEEN 7 AND 9 THEN 'First Quarter' 
     WHEN MONTH(date) BETWEEN 10 AND 12 THEN 'Second Quarter' 
     WHEN MONTH(date) BETWEEN 1 AND 3 THEN 'Third Quarter' 
     WHEN MONTH(date) BETWEEN 4 AND 6 THEN 'Fourth Quarter' 
    END AS quarter 
FROM Stuff 

Answer 2

DB2有一個內置的QUARTER function，做我認爲你想要的：

SELECT QUARTER(CURRENT TIMESTAMP) FROM SYSIBM.SYSDUMMY1