Question : MYSQL query syntax, subquery joins alias

The following query returns an error saying that I have invalid syntax near ' ' at line 1. The basics of this is:

I have a stock_history table that stores historical stock prices, a stock company table that stores the company name and symbol, and a stock transaction table that stores each buy/sell transaction.

I'm writing the query to display someones portfolio - so it will show the company names, the number of shares the person owns and the most recent price of each company's shares, ie: google - 200 - $12.54

If i remove the subquery in the where clause, the query executes just fine.

I will also have to eventually modify this query so that it will only use use qty rows from the stock_transaction table when the date of the transaction is greater than the date the company was activated.

Code Snippet:

         
           
           
             SELECT b.sc_name AS company, sum( a.st_qty ) AS 'shares', (
  SELECT c.sh_value
  FROM stock_history c
  WHERE c.sh_id = b.sc_id
  ORDER BY c.sh_date DESC
  LIMIT 1
) AS 'value'
FROM stock_transaction a
INNER JOIN stock_company b ON a.st_company = b.sc_id
WHERE a.st_owner =1
GROUP BY b.sc_name ASC
           
         

Open in New Window

Select All

Answer : MYSQL query syntax, subquery joins alias

SELECT b.sc_name AS company, sum( a.st_qty ) AS shares, c.sh_value AS value
FROM stock_transaction a
INNER JOIN stock_company b ON a.st_company = b.sc_id
INNER JOIN stock_history c ON c.sh_company = b.sc_id AND c.sh_id = ( SELECT c1.sh_id
FROM stock_history c1
WHERE c1.sh_company = b.sc_id
ORDER BY c1.sh_date DESC
LIMIT 1)
WHERE a.st_owner = 1
GROUP BY b.sc_name ASC