What technique is used to retrieve data from more than one
table in a single SQL statement?
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Answer / mani
Both UNION or UNION ALL and JOIN can be used.
The purpose of retreiving data from more than one table in a
single statement generally happens when the ouput of the
involved tables has same table structure and in this case
either UNION (to eliminate the duplicates in the resultant
table)or UNION ALL (to retain the duplicates in the
resultant table)could be used.
If retrieval is based on seletion criterion then JOINS could
also be used but here the resultant table structure can be
different from that of the tables involved in join operation.
| Is This Answer Correct ? | 6 Yes | 0 No |
Answer / ravi
We can do this by using JOINS as well as Sub Queries
| Is This Answer Correct ? | 4 Yes | 2 No |
Answer / rahul
select <column name of 1st table>,<column name of 2nd table>
from <Table name 1st>,<Table name2nd>;
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / anjireddy vintha
By using JOINS and UNIONS we can retive data from
morethan one table.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / karthik
select <column name of 1st table>,<column name of 2nd table>
from <Table name 1st> join <Table name2nd> where
table1.columnname = table2.columnname;
atleast one column should be unique in both the tables.
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / ajay rana
join techniques is used to to retrieve data from more than
one table in a single SQL statement.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / biryuk
UNION could be used to retrieve data from more than one
table as well.
| Is This Answer Correct ? | 2 Yes | 3 No |
Answer / bala
Using Temp Table data can be retrieved from more than one
table.
| Is This Answer Correct ? | 0 Yes | 3 No |
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