Answer / vaibhavi_dixit

Dual table is know as magic table, which has only one
columns with name as "DUMMY" and a row with value X.
One can describe DUAL with desc dual; command.
It is mainly used for testing some math expressions or some
character functions like
select (2+2) from dual;
It is automatically created,assigned to SYS but accessible
to all users.

VD

Answer / santosh

Dual is a magic table

Answer / roopesh kumar

In oracle Dual is a magic table.

Answer / shekharjchandra

We can view the structure of the DUAL table by

SQL> DESCRIBE DUAL

or being in SYS user

SYS> SELECT DBMS_METADATA('TABLE','DUAL','SYS') FROM DUAL ;

Before that use below set command

SQL> SET PAGESIZE 100 -- or whatever you like so that you can see whole structure of the create table definition

Regards
J

Answer / annam.n

dual is an imaginary table.it only used for process any
functions on there, but we can't view the structure of the
dual table.so the dual table is a magic table

Answer / brahma

They are two tables in MS Sql Server
1.Delete table
2.Update table

what is meant by urlencode and urldocode? : Sql dba

0 Answers  

What is program debugging?

0 Answers  

i have a table like this. cityno cityname mails 1 BANGALORE 8KM 2 HSR LAYOUT 20KM 3 MEJISTIC 30KM 4 JAYADEVA 55KM 5 ITPL 80KM 6 HEBBAL 115KM I HAVE DATA LIKE THIS I WANT O/P LIKE THIS DISTANCE NO.OFCITY 0-50KM 3 51-100KM 2 101-150KM 4 AND SO ON pls give me answer. i want urgent

6 Answers  

How many triggers can be applied to a table?

0 Answers  

What is the need of merge statement?

0 Answers  

Under what condition it is possible to have a page level lock and row lock at the same time for a query? : Transact sql

0 Answers  

What is the main difference between a UNION statement and a UNION ALL statement? 1. A UNION statement eliminates duplicate rows; a UNION ALL statement includes duplicate rows. 2. A UNION statement can be used to combine any number of queries; a UNION ALL statement can be used to combine a maximum of two queries. 3. A UNION statement can only combine queries that have parallel fields in the SELECT list; a UNION ALL statement can combine queries with differing SELECT list structures. 4. A UNION statement cannot be used with aggregate functions; a UNION ALL statement can be used with aggregate functions. 5. There is no difference between the two statements; they are interchangeable.

2 Answers   Saman Bank, Sonata,

What is the difference between stored procedure and view?

0 Answers  

How do I sort a table in sql?

0 Answers  

what is the use of double ampersand (&&) in sql queries?

0 Answers  

Does inner join return duplicate rows?

0 Answers  

what is sql optimization

1 Answers   Fidelity,