我有100條記錄,其中我可以在查詢中使用「TOP 10」選擇前10名。同樣有什麼可以獲得20到30的記錄?查詢與TOP 10類似以選擇中間記錄?
2
A
回答
3
由於您使用的是SQL Server 2005,因此您可以使用「新」ROW_NUMBER()函數。這會給你排11〜20:
SELECT Description, Date
FROM (SELECT ROW_NUMBER() OVER (ORDER BY Date DESC)
AS Row, Description, Date FROM LOG)
AS LogWithRowNumbers
WHERE Row >= 11 AND Row <= 20
如果你有很多的記錄,內部SELECT子句中使用TOP X,因爲沒有使用返回1000條記錄,如果你只可以加快事情有點經歷20搶到記錄11:
SELECT Description, Date
FROM (SELECT TOP 20 ROW_NUMBER() OVER (ORDER BY Date DESC)
AS Row, Description, Date FROM LOG)
AS LogWithRowNumbers
WHERE Row >= 11 AND Row <= 20
1
您應該使用ROWNUMBER()用於獲取結果集的記錄數和過濾它在那裏的原因。
SELECT * FROM (SELECT ROW_NUMBER() OVER(ORDER BY name) AS
rownum, name , age FROM Table) AS Table1
WHERE rownum >= 2 AND rownum <= 5
----------------------------
rownum | name | age |
----------------------------
2 |John | 25 |
3 |Adam | 23 |
4 |Tom | 19 |
5 |Jame | 22 |
----------------------------