sql - UNION ALL 和 inner join 在另一边

Question

我想要查询想要实现的位置我的内部连接具有相同的价值应该是他们唯一的价值作为第一个价值专栏，图片在这里：

而我只想输出就是图中的红线

这是我的查询：

  SELECT it.Date AS 'Date', it.invoice AS 'Invoice No.', 
         it.company AS 'Company', it.total_amount AS 'Total Amount'
  FROM invoicesummary_tbl it
  WHERE it.total !=0 
  UNION ALL
  SELECT itt.Date AS 'Date',rt.revises_no AS 'Invoice_No.', itt.company AS 
  'Company', 
       itt.total_amount AS 'Total Amount'   
  FROM revises_tbl rt
  INNER JOIN invoicesummary_tbl itt
  ON itt.invoice=rt.invoice

Answer 1

使用DISTINCT关键字：

SELECT DISTINCT *
  FROM (SELECT it.Date AS 'Date',
               it.invoice AS 'Invoice No.',
               it.company AS 'Company',
               it.total_amount AS 'TotalAmount'
          FROM invoicesummary_tbl it
         WHERE it.total != 0
        UNION ALL
        SELECT itt.Date AS 'Date',
               rt.revises_no AS 'Invoice_No.',
               itt.company AS 'Company',
               itt.total_amount AS 'Total Amount'
          FROM revises_tbl rt
               INNER JOIN invoicesummary_tbl itt ON itt.invoice = rt.invoice
) AS a

Answer 2

我猜你的第二个查询会重复数据。你可以试试

 SELECT it.Date AS 'Date', it.invoice AS 'Invoice No.', 
         it.company AS 'Company', it.total_amount AS 'Total Amount'
  FROM invoicesummary_tbl it
  WHERE it.total !=0 
  UNION ALL
  SELECT DISTINCT itt.Date AS 'Date',rt.revises_no AS 'Invoice_No.', itt.company AS 
  'Company', itt.total_amount AS 'Total Amount'   
  FROM revises_tbl rt
  INNER JOIN invoicesummary_tbl itt
  ON itt.invoice = rt.invoice

sql - UNION ALL 和 inner join 在另一边

sql - UNION ALL and inner join in the other side

mysql

sqlyog