我想行轉換2行作爲SQL 2000中2列，而無需使用樞

Question

我想行轉換2行的2列在SQL 2000 不使用樞

如：

A B C 
---- ---- ------- 
78 68 3 

我要輸出作爲

Projects Count 
--------- ------- 
A   78 
B   68 
C   3 

Answer 1

如果我理解正確的話，你確實需要一個支點查詢：

select 'A' as Projects, A as my_count from mytab 
union all 
select 'B' as Projects, B as my_count from mytab 
union all 
select 'C' as Projects, C as my_count from mytab 

（我用count替換count爲my_count，因爲COUNT是SQL中的保留字）。

Answer 2

SELECT 
    pivot.field, 
    CASE pivot.field 
    WHEN 'A' THEN A 
    WHEN 'B' THEN B 
    WHEN 'C' THEN C 
    END as value 
FROM 
    my_table 
CROSS JOIN 
    (SELECT 'A' AS field UNION ALL SELECT 'B' UNION ALL SELECT 'C') AS pivot