這個oracle查詢有什麼問題？

Question

SELECT * 
    FROM (SELECT ROWNUM rnum, 
       query.* 
     FROM (WITH myQuery AS(
        SELECT column_b 
         FROM table_a a 
        WHERE a.column_a = 1234) 
     SELECT b.column_e AS some_column 
      FROM table_b b, 
       table_c c, 
       table_a a 
     LEFT JOIN table_d d ON c.column_c = d.column_d 
      JOIN myQuery mq ON a.column_b = mq.column_b 
      WHERE b.column_b = a.column_b) query) 
WHERE rnum > 0 

Answer 1

不要混合使用ANSI-88和ANSI-92 JOIN語法，選擇一個或其他。下面是使用ANSI-92語法查詢：

WITH myQuery AS (
    SELECT column_b 
    FROM table_a a 
    WHERE a.column_a = 1234) 
SELECT x.* 
    FROM (SELECT b.column_e AS some_column, 
       ROWNUM 'rnum' 
      FROM table_b b 
      JOIN TABLE_A a ON a.column_b = b.column_b 
      JOIN myQuery mq ON mq.column_b = a.column_b 
      JOIN table_c c ON c.? = ?? --need join criteria here 
    LEFT JOIN table_d d ON c.column_c = d.column_d) x 
WHERE x.rnum > 0 

你舉的例子沒有什麼TABLE_C加入到 - 因此?和??

我不知道WITH子句可以在子查詢中被定義 - 我當然，我以前在10g嘗試過時遇到了一個錯誤。