Types of joins?
Answers were Sorted based on User's Feedback
Answer / sangeetha meda
1. Self Join
Self join is a query in which a table is Joined to itself.
Self joins are used to compare the values in a column to
the other values in the same column in the same table.
2.Equi Join or Inner join
Equi join is a join in which the rows are retrieved the
equality of the relation ship between columns in the tables.
Select only those rows that have values in common in the
columns specified in the ON clause.
3.Non Equi Join or Outer Join
Left Outer Join:
Retrieves the matching records in both the table and non
matching records in the first or left table.
Right Outer Join
retrieves the matching records in both the table and non
matching records in the second or the right table.
Full Outer Join
Retrieves all the records (means matching and non matching
records in both the tables).
Is This Answer Correct ? | 5 Yes | 0 No |
Answer / deeksha
4 types
1.equijoin
2.non-equijoin
3.self join
4.outer join
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / mohana sundaram
self joins,natural joins,cross joins,inner joins,outer
joins,equi and nonequi joins.
Is This Answer Correct ? | 2 Yes | 0 No |
(1) Inner or Equei join
(2) Outer or no - equei join
(a) left outer
(b) right outer
(c) full outer
(3) Cartision or cross join
(4) Self join
(5) Natural join
Is This Answer Correct ? | 2 Yes | 0 No |
a procedure one in two out parameters i am waiting it in a sql query can i get the output
Is vs as in pl sql?
Which query operators in sql is used for pattern matching?
Explain Connect by Prior?
Which is faster subquery or join?
what is the difference between rownum pseudo column and row_number() function? : Sql dba
how to convert dates to character strings? : Sql dba
Define a temp table?
What is the difference among union, minus and intersect?
what are the security recommendations while using mysql? : Sql dba
I have done oracle 10g. I need a project knowledge. So if u please send a project how it should be done,Or you can send email link. I will be very grateful to u.
What is the purpose of the primary key?