Correct way to select from two tables in SQL Server with no common field to join on

Question

Back in the old days, I used to write select statements like this:

SELECT 
table1.columnA, table2.columnA

FROM
table1, table2

WHERE
table1.columnA = \'Some         


        

Answer 1

Cross join will help to join multiple tables with no common fields.But be careful while joining as this join will give cartesian resultset of two tables. QUERY:

SELECT 
   table1.columnA
 , table2,columnA
FROM table1 
CROSS JOIN table2

Alternative way to join on some condition that is always true like

SELECT 
   table1.columnA
 , table2,columnA
FROM table1 
INNER JOIN table2 ON 1=1

But this type of query should be avoided for performance as well as coding standards.