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使用DTS導入Excel表中的資料

近日,工作關系涉及将Excel表中的資料導入SQL SERVER資料庫中,先将自己在過程中的心得總結如下:

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1 )使用SQL Server 自帶的導入導出功能非常不友善,校驗很強,容易造成導入失敗。建議使用DTS 工具,沒有那麼強的校驗,操作與自帶的導入導出基本一樣,很好用。

2 )在導入之前盡量去掉各種限制條件,例如“不許為空”,“關聯依賴”等,使源資料盡量“簡單輕便”。如果是Excel ,建議将資料的表頭(一般為Excel 中的第一行)用資料庫表中的英文替代,這樣在導入時做校驗時好判斷是否導入正确的字段列。

3 )一般如果要将源資料導入庫中的多張關聯表時,建議可以先将他們放入一張表,然後一次性導入,再在資料庫中“折騰”。當然,視情況而定,如果一對多的話也隻能多次導入了。

4 )在資料庫中,将一張表的記錄複制到另一張表,可使用語句

SELECT *

INTO 目标表名

FROM 源表名

其中,‘* ’可替換為源資料表中的指定列。這條語句相當于建立目标表,再插入資料。注意,使用這條語句時,資料庫中目标表應該不存在。如果存在,需要先删除該表

如果不想建立表,也即目标表已經存在,那麼我們可以使用如下SQL

INSERT INTO 目标表名

SELECT 屬性列

FROM 源表名

WHERE 判斷條件

注意:子查詢的選擇清單必須與INSERT 語句列的清單比對。如果沒有指定列的清單,選擇清單必須與正向其插入的表或視圖的列比對。