將字符串添加到結果集中包含的select語句

Question

我試圖向mysql結果集中添加一個字符串，以保存以後用php操作結果。

這是我想要做的，但它給了我一個錯誤。

SELECT 'new' AS condition 
    UNION 
SELECT p.Name AS title, p.meta_desc AS description, p.product_Id AS id from products AS p 

我可以這樣做：

SELECT p.Name AS title, p.meta_desc AS description, p.product_Id AS id, 'new' from products AS p 

但它提供了新的=>新的，我非常希望結果列被稱爲「descripiton」和檢索「條件」 =>「新」

Answer 1

SELECT p.Name AS title, 
     p.meta_desc AS description, 
     p.product_Id AS id, 
     'new' AS `condition` 
FROM products AS p 

您可以爲字面別名。 Condition是保留字，所以你必須使用反引號。