what is a join? what are the types of joins?
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Answer / m m naidu
JOIN: A join is a query using which we can query data from
more than one table
TYPES OF JOINS:
1.EQUI JOIN
2.SELF JOIN
3.OUTER JOIN
a.left outer join
b.right outer join
c.full outer join
4.cartesian join
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / arkchowdary
Join----------------- Ajoin is fetch the data 1 or more
tables this is known as join.
Types of Joins-------------- Equi Join,
Nonequi join,
Self Join,
Cartesoin Join,
Outer Joins
Leftouter Join,
Rightouter join,
Full outer Join.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / palzkumar
Both are right.. but slight changes... joins is used to
fetch the records/data item from two or more queries (no
tables in cognos) using
type of joins like...
1.EQUI / SIMPLE JOIN (eg. 1:1 = 1:n)
2.SELF JOIN
3.OUTER JOIN
a.left outer join (eg. 1:0 = 1:n)
b.right outer join (eg. 1:1 = 1:0)
c.full outer join (eg. 1:0 = n:0)
| Is This Answer Correct ? | 0 Yes | 2 No |
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