MySQL Query抛出错误'mysql_num_rows（）期望参数1是资源，布尔给定'

Question

我对mysql有些新手，我有一个错误的查询，我无法弄明白。

SELECT field1, field2, field3, field4 AS name, title, url, description FROM table_data

Answer 1

你试过这个吗？

SELECT field1 as 'name'
      , field2 as 'title'
      , field3 as 'url'
      , field4 as 'description'
FROM  table_data