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Status: published
Programming, Software and application
2020-12-07 03:13:23
CROSS JOIN
1809
Introduction to Oracle Database Oracle Tables and Data definition Modifying data Oracle Query and Filter Oracle data types Joining tables Oracle Operators Grouping data Constraints
এই কোর্সে যা থাকছে
৩টি বিষয়
৮০টি লাইভ ক্লাস
The CROSS JOIN specifies that all rows from first table join with all of the rows of second table. If there are "x" rows in table1 and "y" rows in table2 then the cross join result set have x*y rows. It normally happens when no matching join columns are specified.
In simple words you can say that if two tables in a join query have no join condition, then the Oracle returns their Cartesian product.
Syntax
SELECT * FROM table1 CROSS JOIN table2;
Or
SELECT * FROM table1, table2
Both the above syntax are same and used for Cartesian product. They provide similar result after execution.