Answer / kamal

/* INNER JOIN -- Matched Rows only from Tables */
SELECT NR.RequestId, U.UserId FROM ITWP_NewRequest NR

INNER JOIN ITWP_Users U ON U.UserId = NR.UserId

/* OUTER JOIN -- Matched Rows only from Tables
RIGHT OUTER JOIN -all the rows from Right table and matched
rows from Left Table.

LEFT OUTER JOIN - all the rows from Left table and matched
rows from Right Table.

FULL OUTER JOIN - all the rows from Left table and from
Right Table.
*/
SELECT NR.RequestId, U.UserId FROM ITWP_NewRequest NR

RIGHT OUTER JOIN ITWP_Users U ON U.UserId = NR.UserId

SELECT NR.RequestId, U.UserId FROM ITWP_NewRequest NR

LEFT OUTER JOIN ITWP_Users U ON U.UserId = NR.UserId

SELECT NR.RequestId, U.UserId FROM ITWP_NewRequest NR

FULL OUTER JOIN ITWP_Users U ON U.UserId = NR.UserId

/* A Join without having any condition is known
as Cross Join, in cross join every row in first table is
joins with every row in second table.
*/
SELECT NR.RequestId, U.UserId FROM ITWP_NewRequest NR

CROSS JOIN ITWP_Users U

Answer / veeresh kethari

1.Inner join:All the matched records from the both tables.
2.Left outer join: All the matched records from the both
tables and unmatched records from the left table.
3.Right outer join:All the matched records from the both
tables and unmatched records from the right table.
4.Self join:Joining the table itself.
5.Cross join:Cross join will give u the Cartesian product
from the 2 tables,it won't allow 'where' clause.

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