Question

I’m trying to match up two bits of data, adding to an existing query.

I’m hoping the query itself explains what i’m trying to do. The line I’m having trouble with is LEFT JOIN practitioners p ON insolvencies.practitioner = practitioners.id,

SELECT DISTINCT     i.id            AS  id,
                    i.company       AS  company,
                    i.insolvencyDate AS insolvency_date,
                    i.city          AS  city,
                    i.createdOn     AS  createdOn,
                    1               AS  rank_id,
                    t.entryCopy     AS  insolvency_type,
                    i.businessNature AS business_nature,
                    p.name          AS pract_comp_name,
                    'I'             AS  i_type 
    FROM     insolvencies i, 
        LEFT JOIN practitioners p ON insolvencies.practitioner = practitioners.id, 
        lookupcopy t 
    WHERE    i.checked   =  1    
        AND t.id     =  i.insolvencyType 
        AND i.insolvencyDate    >=  {ts '2010-01-22 00:00:00'} 
        AND i.insolvencyDate    <=  {ts '2011-10-20 00:00:00'} 
        AND (LOWER(p.name)   LIKE   '%Hodgsons%') 
    GROUP BY     id

Answer 1

I think you are looking for something like this:

SELECT DISTINCT i.id AS id
     , i.company AS company
     , i.insolvencyDate AS insolvency_date
     , i.city AS city
     , i.createdOn AS createdOn
     , 1 AS rank_id
     , t.entryCopy AS insolvency_type
     , i.businessNature AS business_nature
     , p.name AS pract_comp_name
     , 'I'     AS i_type 
  FROM insolvencies i
  LEFT JOIN practitioners p ON insolvencies.practitioner = practitioners.id
  CROSS JOIN lookupcopy t 
  WHERE i.checked   =  1    
    AND t.id     =  i.insolvencyType 
    AND i.insolvencyDate    >=  {ts '2010-01-22 00:00:00'} 
    AND i.insolvencyDate    <=  {ts '2011-10-20 00:00:00'} 
    AND (LOWER(p.name)   LIKE   '%Hodgsons%') 
GROUP BY id

The , between tables is the same as CROSS JOIN.

But anyway you should read about cross join, inner join and outer join and use the most appropriate in your case.