datetimesqlserver
① sqlserver datetime為空對應的時間是多少
sql server中datetime類型欄位設置默認值的方法:
一、在企業管理器中選中要修改的表格,點擊滑鼠右鍵,彈出菜單點擊「設計表」
2、選中要設置的欄位,在默認值中綁定默認值
默認值為當前時間:getdate()
默認值為指定時間:'20160101',該格式各資料庫版本有細微差異,示例在SQL2000環境測試:
② 向sqlserver插入DateTime時有失去了datetime溢出異常
估計插了個最小的值 即DateTime.MinValue
原因:datetime 時間類型範圍值必須在1753 年 1 月 1 日到 9999 年 12 月 31 日這個區間內
解決
要麼插入值在這個范圍類
要麼修改數據類型 改為datetime2
③ sqlserver:格式化時間datetime
select cast(convert(varchar(10),getdate(),120) as datetime)
④ sqlserver datetime類型數據查詢問題
SELECT * FROM table WHERE time > CONVERT(CHAR(8),DATEADD(Month,-1,GETDATE()),120)+'26 23:59:59:999' AND time < CONVERT(CHAR(8),GETDATE(),120)+'25'
⑤ SqlServer中DateTime類型怎樣把輸出的秒去掉,只取出年月日和幾點幾分
sql
convert
用法
convert(data_type,expression[,style])
convert(varchar(10),欄位名,轉換格式)
說明:
此樣式一般在時間類型(datetime,smalldatetime)與字元串類型(nchar,nvarchar,char,varchar)
相互轉換的時候才用到.
例子:
select
convert(varchar(30),getdate(),101)
now
結果為:
now
---------------------------------------
|09/15/2001
===================================================================
style數字在轉換時間時的含義如下:
------------------------------------------------------------------------------------------------------------
style(2位表示年份)
|
style(4位表示年份)
|
輸入輸出格式
------------------------------------------------------------------------------------------------------------
0
|
100
|
mon
dd
yyyy
hh:miam(或pm)
------------------------------------------------------------------------------------------------------------
1
|
101
美國
|
mm/dd/yy
------------------------------------------------------------------------------------------------------------
2
|
102
ansi
|
yy-mm-dd
------------------------------------------------------------------------------------------------------------
3
|
103
英法
|
dd/mm/yy
------------------------------------------------------------------------------------------------------------
4
|
104
德國
|
dd.mm.yy
----------------------------------------------------
⑥ 怎麼插入datetime 一條數據 sqlserver
可以使用 CONVERT 函數,將 字元串類型的數據,轉換為 datetime 類型。
CONVERT(DATETIME, '2012-01-02 09:06:18', 120)
其中那個 120 的參數, 取決於你前面的字元串信息是什麼格式的。
執行下面的語句, 就可以一一對應得上。
SELECT 0 AS ID , Convert(VARCHAR(30), GETDATE(), 0 ) AS result UNION ALL
SELECT 100 AS ID , Convert(VARCHAR(30), GETDATE(), 100) AS result UNION ALL
SELECT 1 AS ID , Convert(VARCHAR(30), GETDATE(), 1 ) AS result UNION ALL
SELECT 101 AS ID , Convert(VARCHAR(30), GETDATE(), 101) AS result UNION ALL
SELECT 2 AS ID , Convert(VARCHAR(30), GETDATE(), 2 ) AS result UNION ALL
SELECT 102 AS ID , Convert(VARCHAR(30), GETDATE(), 102) AS result UNION ALL
SELECT 2 AS ID , Convert(VARCHAR(30), GETDATE(), 2 ) AS result UNION ALL
SELECT 102 AS ID , Convert(VARCHAR(30), GETDATE(), 102) AS result UNION ALL
SELECT 3 AS ID , Convert(VARCHAR(30), GETDATE(), 3 ) AS result UNION ALL
SELECT 103 AS ID , Convert(VARCHAR(30), GETDATE(), 103) AS result UNION ALL
SELECT 4 AS ID , Convert(VARCHAR(30), GETDATE(), 4 ) AS result UNION ALL
SELECT 104 AS ID , Convert(VARCHAR(30), GETDATE(), 104) AS result UNION ALL
SELECT 5 AS ID , Convert(VARCHAR(30), GETDATE(), 5 ) AS result UNION ALL
SELECT 105 AS ID , Convert(VARCHAR(30), GETDATE(), 105) AS result UNION ALL
SELECT 6 AS ID , Convert(VARCHAR(30), GETDATE(), 6 ) AS result UNION ALL
SELECT 106 AS ID , Convert(VARCHAR(30), GETDATE(), 106) AS result UNION ALL
SELECT 7 AS ID , Convert(VARCHAR(30), GETDATE(), 7 ) AS result UNION ALL
SELECT 107 AS ID , Convert(VARCHAR(30), GETDATE(), 107) AS result UNION ALL
SELECT 8 AS ID , Convert(VARCHAR(30), GETDATE(), 8 ) AS result UNION ALL
SELECT 108 AS ID , Convert(VARCHAR(30), GETDATE(), 108) AS result UNION ALL
SELECT 9 AS ID , Convert(VARCHAR(30), GETDATE(), 9 ) AS result UNION ALL
SELECT 109 AS ID , Convert(VARCHAR(30), GETDATE(), 109) AS result UNION ALL
SELECT 10 AS ID , Convert(VARCHAR(30), GETDATE(), 10 ) AS result UNION ALL
SELECT 110 AS ID , Convert(VARCHAR(30), GETDATE(), 110) AS result UNION ALL
SELECT 11 AS ID , Convert(VARCHAR(30), GETDATE(), 11 ) AS result UNION ALL
SELECT 111 AS ID , Convert(VARCHAR(30), GETDATE(), 111) AS result UNION ALL
SELECT 12 AS ID , Convert(VARCHAR(30), GETDATE(), 12 ) AS result UNION ALL
SELECT 112 AS ID , Convert(VARCHAR(30), GETDATE(), 112) AS result UNION ALL
SELECT 13 AS ID , Convert(VARCHAR(30), GETDATE(), 13 ) AS result UNION ALL
SELECT 113 AS ID , Convert(VARCHAR(30), GETDATE(), 113) AS result UNION ALL
SELECT 14 AS ID , Convert(VARCHAR(30), GETDATE(), 14 ) AS result UNION ALL
SELECT 114 AS ID , Convert(VARCHAR(30), GETDATE(), 114) AS result UNION ALL
SELECT 20 AS ID , Convert(VARCHAR(30), GETDATE(), 20 ) AS result UNION ALL
SELECT 120 AS ID , Convert(VARCHAR(30), GETDATE(), 120) AS result UNION ALL
SELECT 21 AS ID , Convert(VARCHAR(30), GETDATE(), 21 ) AS result UNION ALL
SELECT 121 AS ID , Convert(VARCHAR(30), GETDATE(), 121) AS result
⑦ 判斷sql server中datetime欄位是否為null的問題
首先要看看你表裡那個欄位是否允許為null
如果允許,可以
update
表名
set
欄位名=null
where
欄位名='2009-08-25'
如果表裡欄位不允許為null,那要先改表欄位的屬性,後再update
⑧ mybatis查詢sqlServer中的datetime類型查無資料怎麼回事
用myeclipse查詢資料庫datetime類型的欄位結果多了「.0」是因為時間精確到毫秒。
如果在應用程序中使用以下語句設定日期格式,那麼就會多出毫秒。
DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")
比如:
假設時間為-2016-03-11 12:50:49.00
{0:yyyy-MM-dd hh:mm:ss.fff}:使用12小時制格式化日期
⑨ 怎麼向sqlserver插入datetime 格式數據
可以插入短日期的字元形式,也可以插入長日期的字元形式。
1、創建測試表:
createtabletest
(ttimedatetime);
2、插入短日期:
insertintotestvalues('2015-09-14');
結果截圖: