wht is d/f b/w inner join and outer join ? d/f group by and order by having by ?
Answers were Sorted based on User's Feedback
Answer / srinivasa yadav
INNER JOIN: ALL THE MATCHED ROWS FROM BOTH THE TABLES ARE
DISPLAYED IN THE RESULTANT TABLE.
OUTER JOIN: THERE ARE THREE TYPES OF OUTER JOIN
THEY ARE
1)LEFT OUTER JOIN
2)RIGHT OUTER JOIN
3)FULL OUTER JOIN
LEFT OUTER JOIN:- ALL THE MATCHED AND UNMATCHED ROWS FROM
BOTH TABLES FROM THE LEFT TABLE ARE DISPLAYED IN THE
RESULTANT TABLES
RIGHT OUTER JOIN:- ALL THE MATCHED AND UNMATCHED ROWS FROM
BOTH RIGHT TABLE ARE DISPLAYED IN THE RESULTANT TABLE.
FULL OUTER JOIN:- ALL THE MATCHED AND UNMATCHED ROWS FROM
BOTH THE TABLES ARE DISPLAYED IN THE RESULTANT TABLE.
GROUP BY CLAUSE:- IT IS USED ON GROUP OF DATA AND PROCESS AN
SQL QUERY.
ORDER BY:- IT IS USED TO SORT THE DATA IN ASCENDING OR
DESCENDING ORDER.
EX:- SELECT EMPID FROM EMP_TBL ORDER BY
DSC (OR) ORDER BY 1.
ORDER BY 1 i.e THE COLUMN NUMBER (EMPID)
HAVING BY:- IT IS USED FOR CONDITION CHECKING.
Is This Answer Correct ? | 5 Yes | 1 No |
Answer / lu
u have 2 table (a,b), u join together,u get colunms
matching it's called inner....
u have 2 tables (a,b), u select a colunm(b) doesn't exist
in a...it's called outer...
goup by using for a row...
having by using for column
Is This Answer Correct ? | 2 Yes | 0 No |
What is dbrm in db2 database?
What is DYNSLT keyword? How do you perform selection using DYNSLT
How do you simulate the explain of an embedded sql statement in spufi/qmf?
Where could you look if you had a question about whether a column has been defined as an index?
Can you access the DB2 Directory table using SQL?
How to find the number of rows in db2 tables?
How many types of page locks can be held in db2?
How to find the number of rows in a db2 table?
What language is db2 written in?
When is the results table for the query in a DECLARE CURSOR statement created?
How to solved 818 error
4 Answers Keane India Ltd, Wipro,
What is image copy?