When we prefix an SQL query with the keyword \"explain\" we get a table with some columns. Please tell me what is the \"type\" column. What does eq_ref and re
eq_ref
re
The "type" refers to the join type made in your request. From best to worst, here is the list :
You will find a more detailed explanation at the MySQL documentation : http://dev.mysql.com/doc/refman/5.0/en/explain-output.html