使用SQL（MySQL）從日期列中獲取所有獨特的年份

Question

我有一個名爲'created'的日期時間列的MySQL表，其中包含記錄插入的日期和時間。這個表格現在有大約30條記錄。我想從這張表中獲得所有發生年份（獨特的，不是每個記錄）。有沒有辦法使用MySQL查詢來做到這一點？

Answer 1

SELECT DISTINCT YEAR(created) FROM table 

Answer 2

SELECT EXTRACT(year from created) as year 
FROM your_table 
GROUP BY year 

應該工作:)在這些線路上

Answer 3

的東西應該工作（注意：提前未經測試的代碼）

select year(created) as year, count(*) as count from table_name group by year 

這也給的每年記錄數。

Answer 4

Select 
EXTRACT(year from your_column_name) as MYEAR from your_table_name 
group by EXTRACT(year from your_column_name) 

以上爲我工作...

Answer 5

SELECT DISTINCT YEAR（日期）AS MYR FROM YOUR_DBF_HERE ORDER BY MYR