如何把2行從查詢返回到成單排2列在Oracle SQL

Question

我運行，返回2行

SELECT a FROM TABLE-A WHERE condition=something; 

ROW1值1

2行值2

查詢

現在，我希望把它放在一個新表中單列的2列

SELECT column1, column2 FROM TABLE-B WHERE condition=something; 

ROW1列1列2

value1 value2 

能否請你幫我這個？

Answer 1

目前還不清楚要如何挑選哪一行進入哪一列 - 這裏有幾個選項：

SELECT MIN(a) AS minimum_value, 
     MAX(a) AS maximum_value 
FROM table_a 
WHERE 1=1; 

或

SELECT MAX(a) KEEP (DENSE_RANK FIRST ORDER BY ROWNUM) AS first_value, 
     MAX(a) KEEP (DENSE_RANK LAST ORDER BY ROWNUM) AS last_value 
FROM table_a 
WHERE 1=1; 

或

SELECT * 
FROM (SELECT a, ROWNUM AS rn FROM table_a WHERE 1=1) 
PIVOT (MAX(a) FOR rn IN (1 AS first_value, 2 AS second_value));