Use
A Join is used to link columns in different tables.
Procedure
To link two columns from two different tables, first select a column from the first table and drag this to a column in the second table. You can identify a link between columns in different tables by the line connecting the columns.
To specify the join more precisely, select the join to be specified with the right mouse button and then choose Show Join Definition. You can now specify the join type and a corresponding relational operator.
To delete a join, select it using the right mouse button and then choose Delete Join.
If a table is used twice, SQL Studio assigns aliases. This allows tables to be used for self joins.