text: SELECT if(tsii.buy-tsii.sell>0, tsii.buy-tsii.sell,0) AS '買超',
         if(tsii.sell-tsii.buy>0, tsii.sell-tsii.buy,0) AS '賣超',
         stock_price.Close AS '股價',
         tsii.date AS date
  FROM taiwan_stock_institutional_investors AS tsii
  INNER JOIN taiwan_stock_info AS si ON si.stock_id = tsii.stock_id
  INNER JOIN taiwan_stock_price AS stock_price ON tsii.stock_id = stock_price.StockID
  AND tsii.date = stock_price.Date
  WHERE tsii.name = 'Investment_Trust'
    AND si.stock_name = '台積電'
    AND tsii.date >= '2015-01-02'