尝试使用内部联接将 3 个表联接在一起时出现错误 1052

Question

I am having trouble using an inner join to join 3 tables together. The tables are as follows.

mysql> SELECT * FROM tbldvdactors;

ACTORID	FName	LName
1	Val	Kilmer
2	Johnny	Depp
3	John	Cleese
4	Michael	Keaton
5	Roy	Scheider

mysql> SELECT * FROM tbldvdtitles;

ASIN	Title	Price
6304711905	Tombstone	1.95
783229526	Fear and Loathing in Las Vegas	8.46
B00005O3VC	Monty Python and the Holy Grail	8.88
B001CCIRG4	Beetlejuice	9.60
B007STBUHI	Jaws	7.62

mysql> SELECT * FROM tblrelantionships;

ASIN	ACTORID
6304711905	1
783229526	2
B0000503VC	3
B001CCIRG4	4
B007STBUHI	5

Here is the command I am using

    mysql> SELECT ASIN, Title, ACTOR_ID, FName, LName, Price
    -> FROM tblrelantionships
    -> INNER JOIN tbldvdtitles
    -> ON tblrelantionships.ASIN = tbldvdtitles.ASIN
    -> INNER JOIN tbldvdactors
    -> ON tblrelantionships.ACTORID = tbldvdactors.ACTORID;
    ERROR 1052 (23000): Column 'ASIN' in field list is ambiguous

Thanks in advance for any help you guys can provide.

Answer 1

The ASIN column is defined in more than one table, so you have to explicitly select one.
Using tables aliases makes query shorter and easier to read IMHO.

SELECT 
   tt.ASIN, tt.Title, ta.ACTOR_ID, ta.FName, ta.LName, tt.Price
FROM tblrelantionships tr
INNER JOIN tbldvdtitles tt 
   ON tr.ASIN = tt.ASIN
INNER JOIN tbldvdactors ta 
   ON tr.ACTORID = ta.ACTORID;

Answer 2

On the first line, you should specify the table from which you are selecting the field ANSI. Try this:

 mysql> SELECT tblrelantionships.ASIN, Title, ACTOR_ID, FName, LName, Price
-> FROM tblrelantionships
-> INNER JOIN tbldvdtitles
-> ON tblrelantionships.ASIN = tbldvdtitles.ASIN
-> INNER JOIN tbldvdactors
-> ON tblrelantionships.ACTORID = tbldvdactors.ACTORID;