Can we join two tables without any relation?
The answer to this question is yes, you can join two unrelated tables in SQL and in fact, there are multiple ways to do this, particularly in the Microsoft SQL Server database.
The most common way to join two unrelated tables is by using CROSS join, which produces a cartesian product of two tables..
How do you join a table on its own?
The self-join is a special kind of joins that allow you to join a table to itself using either LEFT JOIN or INNER JOIN clause. You use self-join to create a result set that joins the rows with the other rows within the same table.
How can I join two table data in mysql without joining?
Re: MYSQL: how to select data from two tables without join statement !!Create a temporary table (include table 1 and table 2 columns).Query the matched records from table 1 and table2, and insert them into the temporary table.Query the not matched records from table 1, and insert it into the temporary table.More items…•
Can we join tables without primary key?
A primary key is not required. A foreign key is not required either. You can construct a query joining two tables on any column you wish as long as the datatypes either match or are converted to match. No relationship needs to explicitly exist.
Can we join 2 tables without common column?
Yes, you can! The longer answer is yes, there are a few ways to combine two tables without a common column, including CROSS JOIN (Cartesian product) and UNION. The latter is technically not a join but can be handy for merging tables in SQL.