在mysql中获取相关标签（需要帮助）

Question

i have a table in mysql

Table name: related_tags

 tag_1   |   tag_2
....................
 iphone      ipod
 ipad        ipone
 iphone      mac
 iphone      apple
 ipod        ipone
 iphone      ipod
 apple       iphone

i want to print related tags to the iphone from this table..

and the tags which is used more times with iphone should be at 1st

eg: ipod (used 3 times), apple used 2 times

ipod should be 1st and apple must be 2nd and so on.

what will be the exect query

Answer 1

The fact that you're numbering your columns shows that something is wrong with your schema in the first place. You should have one table containing all tags (tagID, tagName) and then a second table where you store the relations (tagID, tagID). This way you can easily query your relations.