列定義的含糊SQL加

-3

我試圖在SQL運行這個加號，但它給我這個錯誤列定義的含糊SQL加

SELECT reviewer_address, reviewer_name, review_date 
FROM reviewers, reviews 
INNER JOIN reviews ON reviewers.reviewer_address = reviews.review_date 
INNER JOIN reviewers ON reviews.review_date = reviewers_address; 

ERROR at line 1: 
ORA-00918: column ambiguously defined

有誰知道我做錯了嗎？

這些評語表和評審

CREATE TABLE reviewers (
    reviewer_id   NUMBER (6), 
    reviewer_name  VARCHAR2 (30), 
    review_name   VARCHAR2 (15), 
    reviewer_address REF address_type SCOPE IS addresses 
); 

CREATE TABLE reviews (
    review_id   NUMBER (6), 
    review_name   VARCHAR2 (30), 
    review_date   DATE, 
    reviewer_id   NUMBER (6) NOT NULL, 
    venue_id   NUMBER (6) NOT NULL 
);

而這些插件爲他們兩個表

--reviews 
INSERT INTO reviews (review_id, review_name, review_date, reviewer_id, venue_id) 
VALUES (1, 'MIKE POWELL', '03-DEC-2015', 1, 1); 

INSERT INTO reviews (review_id, review_name, review_date, reviewer_id, venue_id) 
VALUES (2, 'JOHN MAYER', '15-MAY-2004', 2, 2); 

INSERT INTO reviews (review_id, review_name, review_date, reviewer_id, venue_id) 
VALUES (3, 'SETH CONNOR', '25-JAN-2011', 3, 3); 

INSERT INTO reviews (review_id, review_name, review_date, reviewer_id, venue_id) 
VALUES (4, 'JULIA SMITH', '08-AUG-2013', 4, 4); 

INSERT INTO reviews (review_id, review_name, review_date, reviewer_id, venue_id) 
VALUES (5, 'MADONNA MARLEY', '30-NOV-2001', 5, 5); 


--reviewers 
INSERT INTO reviewers (reviewer_id, reviewer_name, review_name, reviewer_address) 
SELECT 1, 'MIKE POWELL', 'TEST REVIEW', REF(a) 
FROM addresses a 
WHERE street = '13 JAMES ROAD'; 

INSERT INTO reviewers (reviewer_id, reviewer_name, review_name, reviewer_address) 
SELECT 2, 'JOHN MAYER', 'MAIN REVIEW', REF(a) 
FROM addresses a 
WHERE street = '54 BRIDGE STREET'; 

INSERT INTO reviewers (reviewer_id, reviewer_name, review_name, reviewer_address) 
SELECT 3, 'SETH CONNOR', 'CAR REVIEW', REF(a) 
FROM addresses a 
WHERE street = '10 LIME STREET'; 

INSERT INTO reviewers (reviewer_id, reviewer_name, review_name, reviewer_address) 
SELECT 4, 'JULIA SMITH', 'BEAUTY REVIEW', REF(a) 
FROM addresses a 
WHERE street = '1 PALL MALL STREET'; 

INSERT INTO reviewers (reviewer_id, reviewer_name, review_name, reviewer_address) 
SELECT 5, 'MADONNA MARLEY', 'CLOTHES REVIEW', REF(a) 
FROM addresses a 
WHERE street = '28 MAIN ROAD';

我希望這使得它更容易爲你們

來源

2016-04-19 Stephanie Iruthayanathan

你知道你從每個表中選擇兩次？ – jarlh

切勿將舊的隱式連接語法與現代的顯式'JOIN'語法混合使用！ – jarlh

你真的在比較一個表中的地址和另一個表中的日期嗎？或者是一個錯誤（可能來自編輯）？ – mathguy

切勿混用舊的隱式連接語法，使用現代的，明確的JOIN語法。並且不要複製選擇列表中的表格。

SELECT reviewer_address, reviewer_name, review_date 
FROM reviewers 
INNER JOIN reviews ON reviewers.reviewer_id = reviews.reviewer_id

來源

2016-04-19 13:38:27 jarlh

ERROR位於第3行： ORA-00932：不一致的數據類型：預期數量得到DATE 我已經改變了一些位上，它只是嘗試，這將更好地工作和新的代碼是這樣 –

SELECT rs.reviewer_address，rs.reviewer_name ，r.review_id 來自評論者rs INNER JOIN評論r ON rs.reviewer_address = r.review_id; –

但現在錯誤在第4行這個錯誤： ORA-00932：不一致的數據類型：預計的REF有NUMBER –

請使用兩種：

SELECT reviewer_address, reviewer_name, review_date 
FROM reviewers, reviews 
where reviewers.reviewer_address = reviews.review_date

或本

SELECT reviewer_address, reviewer_name, review_date 
FROM reviewers 
INNER JOIN reviews ON reviewers.reviewer_address = reviews.review_date

來源

2016-04-19 13:45:56

如果使用它並在sql上運行該文件並指出此錯誤錯誤在第1行： ORA-00932：數據類型不一致：期望NUMBER得到DATE –

列定義的含糊SQL加

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