SQL命令建议

Question

如何在sql中使shipdate年大于2013年。这是我到目前为止的代码：

SELECT shipdate, COUNT(*)
  FROM dw.orderline
  GROUP BY shipdate
  ORDER BY 1;

Answer 1

这样的事情可以解决问题：

SELECT shipdate, COUNT(*) AS SHIP_COUNT
FROM dw.orderline
WHERE shipdate >= '01/01/2013'
GROUP BY shipdate;

编辑：

根据您的意见：

SELECT YEAR(shipdate), COUNT(*) AS SHIP_COUNT
FROM dw.orderline
WHERE YEAR(shipdate) > 2013
GROUP BY shipdate

编辑2：

对于基于Oracle的SQL：

SELECT EXTRACT(year FROM shipdate), COUNT(*) AS SHIP_COUNT
FROM dw.orderline
WHERE EXTRACT(year FROM shipdate) > 2013
GROUP BY shipdate

请参阅SQL Fiddle here

上的工作示例

Answer 2

不应该

SELECT 
    shipdate, COUNT(*)
FROM 
    dw.orderline
WHERE 
    Year(shipdate)>2013
GROUP BY 
    shipdate

也应排除2013年的每个日期。或者我的问题解释不正确？

Answer 3

正确查询：

SELECT shipdate, COUNT(*) ships_counter
  FROM dw.orderline
     WHERE shipdate > '01/01/2013'
        GROUP BY shipdate;