mysql怎么查询树形结构的数据

Question

现有id,pid,name三个字段，要查找id为某值下面的所有数据，应该怎么写效率最高

Answer 1

select a.*,b.name pname from table a,table b where a.pid=b.id and b.id=3

Answer 2

SELECT fileds FROM table_name WHERE pid=id; 

If the amount of data is not large, the program can recursively traverse the query spanning tree;

Answer 3

Oracle has a syntax that supports tree queries. For MySQL, you can only process it through code

Answer 4

Use php+mysql to implement through recursion
Portal:
http://blog.csdn.net/u0102656...