隨機記錄SQL Server的條款

Question

我有一列[Star]（Integer），可以有1或2或3

值我有很多記錄的表。

我如何選擇我的表100分的記錄，首先選擇它[Star]列3個值 然後選擇[Star] 2值和最終選擇[Star] 1倍的值？

Answer 1

，2，然後1，但只有前100用途：

Select Top (100) * 
from your_table 
where [Star] in (1,2,3) 
Order by [Star] desc 

如果不是，請添加一些澄清/樣本數據並輸出到您的問題。

Answer 2

select top 100 * from your_table where star = 1 
union all 
select top 100 * from your_table where star = 2 
union all 
select top 100 * from your_table where star = 3 

Answer 3

SELECT TOP 100 * FROM <TABLE> WHERE [Star] = 3 
UNION ALL 
SELECT TOP 100 * FROM <TABLE> WHERE [Star] = 2 
UNION ALL 
SELECT TOP 100 * FROM <TABLE> WHERE [Star] = 1 

Answer 4

訂購NEWID（）會產生隨機結果。

SELECT * 
FROM (
      SELECT TOP (100) * FROM TABLE_NAME 
      WHERE [Star] = 3 
      ORDER BY NEWID() 
    ) r3 
UNION ALL 
SELECT * 
FROM (
      SELECT TOP (100) * FROM TABLE_NAME 
      WHERE [Star] = 2 
      ORDER BY NEWID() 
    ) r2 
UNION ALL 
SELECT * 
FROM (
      SELECT TOP (100) * FROM TABLE_NAME 
      WHERE [Star] = 1 
      ORDER BY NEWID() 
    ) r3 

如果一共只有100個隨機記錄您可以根據需要調整TOP（n）的，如果你想第一個3