#1066 - Not unique table/alias:

Question

Can you please help me out. I have this SQL query:

SELECT l.url 
FROM (b INNER JOIN links ON b.parent_id = l.id) 
INNER JOIN b ON l.id = b.link 
WHERE l.url          


        

Answer 1

SELECT l.url from b inner join links as l on l.id = l.parent_id
inner join b as b1 on b1.link = l.id
where l.url like 'http:domain%' limit 0,30

In this query we r join two table first b and second links and self join b as b1 alias ok

Answer 2

You seem to be selecting from the same table twice. Each of these occurrences needs its own alias:

SELECT
    l.url
FROM
    b as b1 /* <-- */
    INNER JOIN links as l
      ON b1.parent_id = l.id
    INNER JOIN b as b2 /* <-- */
      ON l.id = b2.link
WHERE l.url LIKE 'http://domain%' LIMIT 0, 30

Please note that I also added the missing alias l for the links table.