about joins# Database - 数据库
s*i
1 楼
I read that a temp table is always created for
joins, with number of rows equals to the multiple
of all tables. is this true? sounds terrible if
I join two or more tables if the rows are not small...
joins, with number of rows equals to the multiple
of all tables. is this true? sounds terrible if
I join two or more tables if the rows are not small...