MySQL UNION 和多个 table 一样。第1064章【=11=】

Question

感谢您阅读我的问题。我试图将多个表的 3 列连接在一起，然后找到与 LIKE 请求匹配的 nameProduct 列。所有表格都有不同的列，看起来就像 3 列：名称、ID 和比率。这是我的代码：

(
    SELECT
        nameProduct,
        rate,
        idProduct
    FROM
        tblaptoplist 

)
UNION
    (
    SELECT
        nameProduct,
        rate,
        idProduct
    FROM
        tbcpulist 
)
UNION
    (
    SELECT
        nameProduct,
        rate,
        idProduct
    FROM
        tbgraphicslist
)
UNION
    (
    SELECT
        nameProduct,
        rate,
        idProduct
    FROM
        tbpccaselist 
)
UNION
    (
    SELECT
        nameProduct,
        rate,
        idProduct
    FROM
        tbradiatorslist 
)
UNION
    (
    SELECT
        nameProduct,
        rate,
        idProduct
    FROM
        tbramlist 

)WHERE nameProduct LIKE 'Asus'
;

并且 MySQL 是报告：

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE
    nameProduct LIKE 'Asus' LIMIT 0, 25' at line 54

我做错了什么？请帮助我

Answer 1

您不能将 WHERE 直接应用于 UNION 的结果。您可以在 SELECT:

中过滤 UNION 的每个子选择或包装结果的查询

SELECT *
  FROM (
      (
      SELECT
        nameProduct,
        rate,
        idProduct
      FROM
        tblaptoplist 
      )
      UNION ...
  ) AS r
 WHERE r.nameProduct LIKE 'Asus'

MySQL UNION 和多个 table 一样。第1064章【=11=】

MySQL UNION and like multiple table . #1064 Mysql

mysql

sql

union

sql-like