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

Question

我对mysql有点新，而且我有一个查询抛出一个错误，我无法弄清楚。

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

Answer 1

你试过吗？

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